./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/popl20-counter-fun.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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:29:45,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:29:45,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:29:45,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:29:45,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:29:45,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:29:45,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:29:45,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:29:45,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:29:45,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:29:45,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:29:45,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:29:45,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:29:45,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:29:45,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:29:45,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:29:45,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:29:45,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:29:45,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:29:45,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:29:45,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:29:45,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:29:45,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:29:45,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:29:45,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:29:45,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:29:45,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:29:45,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:29:45,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:29:45,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:29:45,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:29:45,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:29:45,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:29:45,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:29:45,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:29:45,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:29:45,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:29:45,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:29:45,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:29:45,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:29:45,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:29:45,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:29:45,753 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:29:45,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:29:45,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:29:45,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:29:45,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:29:45,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:29:45,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:29:45,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:29:45,757 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:29:45,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:29:45,758 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:29:45,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:29:45,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:29:45,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:29:45,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:29:45,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:29:45,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:29:45,759 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:29:45,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:29:45,760 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:29:45,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:29:45,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:29:45,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:29:45,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:29:45,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:29:45,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:29:45,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:29:45,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:29:45,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:29:45,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:29:45,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:29:45,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:29:45,763 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:29:45,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:29:45,763 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:29:45,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:29:46,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:29:46,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:29:46,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:29:46,088 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:29:46,089 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:29:46,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-31 02:29:47,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:29:47,565 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:29:47,565 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-31 02:29:47,570 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/945b1611b/a289e770ebee4262b7959582a3308de5/FLAGff6e362bd [2023-08-31 02:29:47,581 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/945b1611b/a289e770ebee4262b7959582a3308de5 [2023-08-31 02:29:47,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:29:47,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:29:47,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:29:47,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:29:47,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:29:47,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b68fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47, skipping insertion in model container [2023-08-31 02:29:47,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:29:47,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:29:47,772 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/popl20-counter-fun.wvr.c[2681,2694] [2023-08-31 02:29:47,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:29:47,792 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:29:47,830 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/popl20-counter-fun.wvr.c[2681,2694] [2023-08-31 02:29:47,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:29:47,844 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:29:47,846 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:29:47,851 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:29:47,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47 WrapperNode [2023-08-31 02:29:47,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:29:47,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:29:47,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:29:47,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:29:47,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,910 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2023-08-31 02:29:47,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:29:47,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:29:47,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:29:47,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:29:47,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:29:47,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:29:47,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:29:47,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:29:47,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (1/1) ... [2023-08-31 02:29:47,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:29:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:48,004 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) [2023-08-31 02:29:48,020 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 [2023-08-31 02:29:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:29:48,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:29:48,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:29:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:29:48,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:29:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:29:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:29:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:29:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:29:48,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:29:48,047 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:29:48,205 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:29:48,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:29:48,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:29:48,651 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:29:48,652 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 02:29:48,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:29:48 BoogieIcfgContainer [2023-08-31 02:29:48,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:29:48,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:29:48,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:29:48,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:29:48,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:29:47" (1/3) ... [2023-08-31 02:29:48,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3749860c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:29:48, skipping insertion in model container [2023-08-31 02:29:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:29:47" (2/3) ... [2023-08-31 02:29:48,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3749860c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:29:48, skipping insertion in model container [2023-08-31 02:29:48,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:29:48" (3/3) ... [2023-08-31 02:29:48,673 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-08-31 02:29:48,680 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:29:48,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:29:48,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:29:48,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:29:48,754 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 02:29:48,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 155 transitions, 326 flow [2023-08-31 02:29:48,870 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2023-08-31 02:29:48,870 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:29:48,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 13/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-31 02:29:48,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 155 transitions, 326 flow [2023-08-31 02:29:48,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-08-31 02:29:48,890 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:29:48,923 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-08-31 02:29:48,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-08-31 02:29:48,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-08-31 02:29:48,976 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2023-08-31 02:29:48,976 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:29:48,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-31 02:29:48,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-31 02:29:53,813 INFO L134 LiptonReduction]: Checked pairs total: 553 [2023-08-31 02:29:53,814 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-31 02:29:53,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:29:53,830 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;@f6ce0c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:29:53,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 02:29:53,835 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-08-31 02:29:53,835 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:29:53,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:53,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:53,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:53,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash -511726821, now seen corresponding path program 1 times [2023-08-31 02:29:53,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:53,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829095310] [2023-08-31 02:29:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:53,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:29:54,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829095310] [2023-08-31 02:29:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829095310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:54,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:54,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:29:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756766136] [2023-08-31 02:29:54,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:54,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:29:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:29:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:29:54,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 305 [2023-08-31 02:29:54,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:54,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 305 [2023-08-31 02:29:54,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:54,518 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2023-08-31 02:29:54,518 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 02:29:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-31 02:29:54,521 INFO L137 encePairwiseOnDemand]: 301/305 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-08-31 02:29:54,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-08-31 02:29:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:29:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:29:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-31 02:29:54,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830601092896175 [2023-08-31 02:29:54,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-31 02:29:54,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-31 02:29:54,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:54,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-31 02:29:54,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,562 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 442 transitions. [2023-08-31 02:29:54,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-08-31 02:29:54,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 02:29:54,566 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-08-31 02:29:54,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-08-31 02:29:54,573 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-31 02:29:54,573 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-08-31 02:29:54,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:54,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:54,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:29:54,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:54,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:54,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1737231503, now seen corresponding path program 1 times [2023-08-31 02:29:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:54,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058395496] [2023-08-31 02:29:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:29:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:54,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058395496] [2023-08-31 02:29:54,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058395496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:54,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701118095] [2023-08-31 02:29:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:54,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 305 [2023-08-31 02:29:54,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:54,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 305 [2023-08-31 02:29:54,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:54,961 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2023-08-31 02:29:54,962 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 02:29:54,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 179 events. 94/179 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 576 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 144. Up to 88 conditions per place. [2023-08-31 02:29:54,964 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-08-31 02:29:54,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2023-08-31 02:29:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-31 02:29:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577049180327869 [2023-08-31 02:29:54,967 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-31 02:29:54,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-31 02:29:54,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:54,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-31 02:29:54,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,974 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 698 transitions. [2023-08-31 02:29:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2023-08-31 02:29:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:29:54,977 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2023-08-31 02:29:54,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-31 02:29:54,978 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-08-31 02:29:54,978 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2023-08-31 02:29:54,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:54,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:54,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:29:54,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:54,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -940242461, now seen corresponding path program 1 times [2023-08-31 02:29:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125596303] [2023-08-31 02:29:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:54,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:29:55,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125596303] [2023-08-31 02:29:55,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125596303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670821655] [2023-08-31 02:29:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:55,098 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) [2023-08-31 02:29:55,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:29:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:29:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:29:55,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:29:55,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670821655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:55,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:29:55,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-31 02:29:55,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49222472] [2023-08-31 02:29:55,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:29:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:55,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:29:55,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:29:55,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:29:55,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:55,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:29:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:55,460 INFO L130 PetriNetUnfolder]: 91/206 cut-off events. [2023-08-31 02:29:55,460 INFO L131 PetriNetUnfolder]: For 234/256 co-relation queries the response was YES. [2023-08-31 02:29:55,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 206 events. 91/206 cut-off events. For 234/256 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 859 event pairs, 60 based on Foata normal form. 44/240 useless extension candidates. Maximal degree in co-relation 451. Up to 132 conditions per place. [2023-08-31 02:29:55,464 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 20 selfloop transitions, 2 changer transitions 23/47 dead transitions. [2023-08-31 02:29:55,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 239 flow [2023-08-31 02:29:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2023-08-31 02:29:55,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2023-08-31 02:29:55,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2023-08-31 02:29:55,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2023-08-31 02:29:55,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:55,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2023-08-31 02:29:55,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,473 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,473 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 5 states and 690 transitions. [2023-08-31 02:29:55,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 239 flow [2023-08-31 02:29:55,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 02:29:55,477 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 98 flow [2023-08-31 02:29:55,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-31 02:29:55,478 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-08-31 02:29:55,478 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 98 flow [2023-08-31 02:29:55,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:55,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:55,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:29:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:55,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:55,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash 166324188, now seen corresponding path program 1 times [2023-08-31 02:29:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604752236] [2023-08-31 02:29:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:29:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:55,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604752236] [2023-08-31 02:29:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604752236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:55,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945984172] [2023-08-31 02:29:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:55,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-31 02:29:55,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:55,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-31 02:29:55,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:55,914 INFO L130 PetriNetUnfolder]: 114/218 cut-off events. [2023-08-31 02:29:55,915 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-31 02:29:55,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 218 events. 114/218 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 40 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 618. Up to 133 conditions per place. [2023-08-31 02:29:55,917 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 38 selfloop transitions, 7 changer transitions 10/55 dead transitions. [2023-08-31 02:29:55,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 335 flow [2023-08-31 02:29:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 02:29:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 02:29:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-31 02:29:55,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2023-08-31 02:29:55,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-31 02:29:55,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-31 02:29:55,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:55,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-31 02:29:55,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,926 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 98 flow. Second operand 6 states and 828 transitions. [2023-08-31 02:29:55,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 335 flow [2023-08-31 02:29:55,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 317 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 02:29:55,930 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 150 flow [2023-08-31 02:29:55,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-31 02:29:55,932 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-08-31 02:29:55,932 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 150 flow [2023-08-31 02:29:55,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:55,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:55,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:55,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 02:29:55,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:55,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1772606940, now seen corresponding path program 2 times [2023-08-31 02:29:55,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:55,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353544417] [2023-08-31 02:29:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:55,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:29:56,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:56,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353544417] [2023-08-31 02:29:56,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353544417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:56,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:56,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053318419] [2023-08-31 02:29:56,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:56,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:56,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:56,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-31 02:29:56,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:56,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-31 02:29:56,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:56,148 INFO L130 PetriNetUnfolder]: 117/224 cut-off events. [2023-08-31 02:29:56,148 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-08-31 02:29:56,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 224 events. 117/224 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 38 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 786. Up to 125 conditions per place. [2023-08-31 02:29:56,150 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 45 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2023-08-31 02:29:56,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 371 flow [2023-08-31 02:29:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-31 02:29:56,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577049180327869 [2023-08-31 02:29:56,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-31 02:29:56,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-31 02:29:56,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:56,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-31 02:29:56,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,158 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 150 flow. Second operand 5 states and 698 transitions. [2023-08-31 02:29:56,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 371 flow [2023-08-31 02:29:56,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 341 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-31 02:29:56,161 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 185 flow [2023-08-31 02:29:56,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-31 02:29:56,162 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-08-31 02:29:56,162 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 185 flow [2023-08-31 02:29:56,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:56,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 02:29:56,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:56,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1182769632, now seen corresponding path program 1 times [2023-08-31 02:29:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:56,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153799139] [2023-08-31 02:29:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:29:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153799139] [2023-08-31 02:29:56,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153799139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338331071] [2023-08-31 02:29:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:56,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:56,241 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) [2023-08-31 02:29:56,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:29:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:29:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:29:56,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 02:29:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338331071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:56,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 02:29:56,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-31 02:29:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910107162] [2023-08-31 02:29:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:29:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:29:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:29:56,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:29:56,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:56,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:29:56,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:56,523 INFO L130 PetriNetUnfolder]: 119/249 cut-off events. [2023-08-31 02:29:56,523 INFO L131 PetriNetUnfolder]: For 633/648 co-relation queries the response was YES. [2023-08-31 02:29:56,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 249 events. 119/249 cut-off events. For 633/648 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 968 event pairs, 67 based on Foata normal form. 22/256 useless extension candidates. Maximal degree in co-relation 882. Up to 202 conditions per place. [2023-08-31 02:29:56,525 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 28 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-08-31 02:29:56,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 303 flow [2023-08-31 02:29:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:29:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:29:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-31 02:29:56,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44754098360655736 [2023-08-31 02:29:56,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-31 02:29:56,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-31 02:29:56,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:56,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-31 02:29:56,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,531 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 185 flow. Second operand 4 states and 546 transitions. [2023-08-31 02:29:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 303 flow [2023-08-31 02:29:56,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:29:56,534 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 202 flow [2023-08-31 02:29:56,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-31 02:29:56,535 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-08-31 02:29:56,535 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 202 flow [2023-08-31 02:29:56,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:56,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:29:56,741 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,SelfDestructingSolverStorable5 [2023-08-31 02:29:56,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:56,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -919263952, now seen corresponding path program 1 times [2023-08-31 02:29:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915276759] [2023-08-31 02:29:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915276759] [2023-08-31 02:29:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915276759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728659436] [2023-08-31 02:29:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:56,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-31 02:29:56,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:56,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-31 02:29:56,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:56,955 INFO L130 PetriNetUnfolder]: 105/203 cut-off events. [2023-08-31 02:29:56,956 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-08-31 02:29:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 203 events. 105/203 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 36 based on Foata normal form. 6/208 useless extension candidates. Maximal degree in co-relation 733. Up to 124 conditions per place. [2023-08-31 02:29:56,958 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 35 selfloop transitions, 9 changer transitions 8/52 dead transitions. [2023-08-31 02:29:56,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 381 flow [2023-08-31 02:29:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-08-31 02:29:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4550819672131148 [2023-08-31 02:29:56,961 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-08-31 02:29:56,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-08-31 02:29:56,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:56,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-08-31 02:29:56,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,967 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,967 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 202 flow. Second operand 5 states and 694 transitions. [2023-08-31 02:29:56,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 381 flow [2023-08-31 02:29:56,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 365 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 02:29:56,970 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 211 flow [2023-08-31 02:29:56,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-31 02:29:56,971 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-31 02:29:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 211 flow [2023-08-31 02:29:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:56,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:56,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 02:29:56,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:56,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1922624012, now seen corresponding path program 2 times [2023-08-31 02:29:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768944718] [2023-08-31 02:29:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:57,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768944718] [2023-08-31 02:29:57,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768944718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:57,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451915602] [2023-08-31 02:29:57,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:29:57,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:57,061 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) [2023-08-31 02:29:57,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:29:57,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:29:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:29:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:29:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:29:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451915602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:29:57,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:29:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:29:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300823865] [2023-08-31 02:29:57,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:29:57,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:29:57,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:29:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:29:57,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:29:57,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:57,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:29:57,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:57,358 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2023-08-31 02:29:57,358 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-08-31 02:29:57,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 195 events. 104/195 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 16 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 743. Up to 92 conditions per place. [2023-08-31 02:29:57,360 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-08-31 02:29:57,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 402 flow [2023-08-31 02:29:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-31 02:29:57,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491803278688525 [2023-08-31 02:29:57,363 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-31 02:29:57,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-31 02:29:57,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:57,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-31 02:29:57,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,368 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 211 flow. Second operand 5 states and 685 transitions. [2023-08-31 02:29:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 402 flow [2023-08-31 02:29:57,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 02:29:57,372 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 233 flow [2023-08-31 02:29:57,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-31 02:29:57,373 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-08-31 02:29:57,374 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 233 flow [2023-08-31 02:29:57,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:57,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:57,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:29:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:57,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:57,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1388345664, now seen corresponding path program 1 times [2023-08-31 02:29:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:57,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376355634] [2023-08-31 02:29:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:57,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376355634] [2023-08-31 02:29:57,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376355634] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:57,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213131502] [2023-08-31 02:29:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:57,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:57,648 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) [2023-08-31 02:29:57,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:29:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:29:57,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:29:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213131502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:29:57,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:29:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:29:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318106224] [2023-08-31 02:29:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:29:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:29:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:29:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:29:57,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:29:57,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:57,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:29:57,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:57,972 INFO L130 PetriNetUnfolder]: 112/209 cut-off events. [2023-08-31 02:29:57,973 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-08-31 02:29:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 209 events. 112/209 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 624 event pairs, 20 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 796. Up to 102 conditions per place. [2023-08-31 02:29:57,975 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-08-31 02:29:57,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 437 flow [2023-08-31 02:29:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-31 02:29:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518032786885246 [2023-08-31 02:29:57,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-31 02:29:57,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-31 02:29:57,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:57,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-31 02:29:57,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,982 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 233 flow. Second operand 5 states and 689 transitions. [2023-08-31 02:29:57,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 437 flow [2023-08-31 02:29:57,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 02:29:57,985 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 273 flow [2023-08-31 02:29:57,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-31 02:29:57,986 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-08-31 02:29:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 273 flow [2023-08-31 02:29:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:57,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:57,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:57,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 02:29:58,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:58,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:58,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:58,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1906605968, now seen corresponding path program 2 times [2023-08-31 02:29:58,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:58,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36661921] [2023-08-31 02:29:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:58,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36661921] [2023-08-31 02:29:58,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36661921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:58,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520475872] [2023-08-31 02:29:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:29:58,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:58,264 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) [2023-08-31 02:29:58,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:29:58,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:29:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:29:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 02:29:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:58,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:29:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520475872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:29:58,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:29:58,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 02:29:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882576542] [2023-08-31 02:29:58,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:29:58,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 02:29:58,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:58,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 02:29:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 02:29:58,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:29:58,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:58,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:29:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:58,649 INFO L130 PetriNetUnfolder]: 128/237 cut-off events. [2023-08-31 02:29:58,650 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-31 02:29:58,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 237 events. 128/237 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 746 event pairs, 20 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 962. Up to 112 conditions per place. [2023-08-31 02:29:58,652 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 54 selfloop transitions, 16 changer transitions 1/71 dead transitions. [2023-08-31 02:29:58,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 544 flow [2023-08-31 02:29:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:29:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:29:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1091 transitions. [2023-08-31 02:29:58,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471311475409836 [2023-08-31 02:29:58,655 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1091 transitions. [2023-08-31 02:29:58,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1091 transitions. [2023-08-31 02:29:58,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:58,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1091 transitions. [2023-08-31 02:29:58,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.375) internal successors, (1091), 8 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,662 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,662 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 273 flow. Second operand 8 states and 1091 transitions. [2023-08-31 02:29:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 544 flow [2023-08-31 02:29:58,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 02:29:58,666 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 326 flow [2023-08-31 02:29:58,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-31 02:29:58,667 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-08-31 02:29:58,667 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 326 flow [2023-08-31 02:29:58,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:58,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:58,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:29:58,873 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,SelfDestructingSolverStorable9 [2023-08-31 02:29:58,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:58,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash 694440902, now seen corresponding path program 3 times [2023-08-31 02:29:58,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:58,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984407235] [2023-08-31 02:29:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:58,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:58,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:58,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984407235] [2023-08-31 02:29:58,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984407235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:58,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:58,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:58,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125760751] [2023-08-31 02:29:58,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:58,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:58,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:58,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-31 02:29:58,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:58,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:58,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-31 02:29:58,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:59,061 INFO L130 PetriNetUnfolder]: 118/217 cut-off events. [2023-08-31 02:29:59,062 INFO L131 PetriNetUnfolder]: For 909/909 co-relation queries the response was YES. [2023-08-31 02:29:59,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 217 events. 118/217 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 36 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 970. Up to 140 conditions per place. [2023-08-31 02:29:59,064 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 13 changer transitions 1/52 dead transitions. [2023-08-31 02:29:59,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 470 flow [2023-08-31 02:29:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-31 02:29:59,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45049180327868854 [2023-08-31 02:29:59,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:59,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,079 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 326 flow. Second operand 5 states and 687 transitions. [2023-08-31 02:29:59,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 470 flow [2023-08-31 02:29:59,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 02:29:59,084 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 304 flow [2023-08-31 02:29:59,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-08-31 02:29:59,084 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-08-31 02:29:59,084 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 304 flow [2023-08-31 02:29:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:59,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:59,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 02:29:59,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:59,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1217746086, now seen corresponding path program 3 times [2023-08-31 02:29:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:59,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066993943] [2023-08-31 02:29:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:59,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066993943] [2023-08-31 02:29:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066993943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:29:59,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:29:59,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:29:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581917193] [2023-08-31 02:29:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:29:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:29:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:29:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:29:59,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 305 [2023-08-31 02:29:59,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 40 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:29:59,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 305 [2023-08-31 02:29:59,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:29:59,258 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-08-31 02:29:59,259 INFO L131 PetriNetUnfolder]: For 759/759 co-relation queries the response was YES. [2023-08-31 02:29:59,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 192 events. 107/192 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 547 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 839. Up to 139 conditions per place. [2023-08-31 02:29:59,260 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-08-31 02:29:59,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 446 flow [2023-08-31 02:29:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:29:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:29:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-31 02:29:59,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45049180327868854 [2023-08-31 02:29:59,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:29:59,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-31 02:29:59,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,268 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 304 flow. Second operand 5 states and 687 transitions. [2023-08-31 02:29:59,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 446 flow [2023-08-31 02:29:59,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 405 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-31 02:29:59,271 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 275 flow [2023-08-31 02:29:59,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-08-31 02:29:59,272 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-08-31 02:29:59,272 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 275 flow [2023-08-31 02:29:59,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:29:59,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:29:59,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:29:59,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 02:29:59,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:29:59,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:29:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash -813997192, now seen corresponding path program 1 times [2023-08-31 02:29:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:29:59,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178443008] [2023-08-31 02:29:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:59,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:29:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:29:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:29:59,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178443008] [2023-08-31 02:29:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178443008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:29:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000730131] [2023-08-31 02:29:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:29:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:29:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:29:59,590 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) [2023-08-31 02:29:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:29:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:29:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:29:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:29:59,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-31 02:29:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:59,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:29:59,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-31 02:29:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:29:59,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000730131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:29:59,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:29:59,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-31 02:29:59,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331781444] [2023-08-31 02:29:59,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:29:59,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:29:59,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:29:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:29:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:29:59,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 305 [2023-08-31 02:30:00,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:00,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:00,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 305 [2023-08-31 02:30:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:00,271 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-08-31 02:30:00,271 INFO L131 PetriNetUnfolder]: For 1330/1375 co-relation queries the response was YES. [2023-08-31 02:30:00,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 474 events. 265/474 cut-off events. For 1330/1375 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1919 event pairs, 25 based on Foata normal form. 25/481 useless extension candidates. Maximal degree in co-relation 1423. Up to 197 conditions per place. [2023-08-31 02:30:00,275 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 63 selfloop transitions, 31 changer transitions 5/105 dead transitions. [2023-08-31 02:30:00,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 836 flow [2023-08-31 02:30:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:30:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:30:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1011 transitions. [2023-08-31 02:30:00,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414344262295082 [2023-08-31 02:30:00,278 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1011 transitions. [2023-08-31 02:30:00,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1011 transitions. [2023-08-31 02:30:00,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:00,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1011 transitions. [2023-08-31 02:30:00,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.375) internal successors, (1011), 8 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:00,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:00,285 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:00,285 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 275 flow. Second operand 8 states and 1011 transitions. [2023-08-31 02:30:00,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 836 flow [2023-08-31 02:30:00,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 760 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-31 02:30:00,290 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 594 flow [2023-08-31 02:30:00,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=594, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-08-31 02:30:00,291 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-08-31 02:30:00,291 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 594 flow [2023-08-31 02:30:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:00,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:00,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:00,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:00,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:00,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:00,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash 585031802, now seen corresponding path program 2 times [2023-08-31 02:30:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:00,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633039698] [2023-08-31 02:30:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:00,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:30:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:00,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633039698] [2023-08-31 02:30:00,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633039698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:00,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596711586] [2023-08-31 02:30:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:00,753 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) [2023-08-31 02:30:00,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:30:00,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:00,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:30:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:00,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-31 02:30:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:30:00,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:00,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-31 02:30:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 02:30:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596711586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:00,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:00,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-08-31 02:30:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718185448] [2023-08-31 02:30:00,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:30:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:30:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:30:01,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 305 [2023-08-31 02:30:01,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 594 flow. Second operand has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:01,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:01,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 305 [2023-08-31 02:30:01,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:01,476 INFO L130 PetriNetUnfolder]: 651/1159 cut-off events. [2023-08-31 02:30:01,476 INFO L131 PetriNetUnfolder]: For 4169/4249 co-relation queries the response was YES. [2023-08-31 02:30:01,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 1159 events. 651/1159 cut-off events. For 4169/4249 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5920 event pairs, 108 based on Foata normal form. 47/1170 useless extension candidates. Maximal degree in co-relation 3372. Up to 479 conditions per place. [2023-08-31 02:30:01,483 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 83 selfloop transitions, 49 changer transitions 20/158 dead transitions. [2023-08-31 02:30:01,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 158 transitions, 1626 flow [2023-08-31 02:30:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 02:30:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 02:30:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1005 transitions. [2023-08-31 02:30:01,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41188524590163933 [2023-08-31 02:30:01,487 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1005 transitions. [2023-08-31 02:30:01,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1005 transitions. [2023-08-31 02:30:01,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:01,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1005 transitions. [2023-08-31 02:30:01,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.625) internal successors, (1005), 8 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:01,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:01,507 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:01,507 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 594 flow. Second operand 8 states and 1005 transitions. [2023-08-31 02:30:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 158 transitions, 1626 flow [2023-08-31 02:30:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1568 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-08-31 02:30:01,521 INFO L231 Difference]: Finished difference. Result has 68 places, 105 transitions, 1193 flow [2023-08-31 02:30:01,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=68, PETRI_TRANSITIONS=105} [2023-08-31 02:30:01,522 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-08-31 02:30:01,523 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 105 transitions, 1193 flow [2023-08-31 02:30:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.45454545454545) internal successors, (1325), 11 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:01,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:01,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:01,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:01,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:01,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1194162893, now seen corresponding path program 3 times [2023-08-31 02:30:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377468114] [2023-08-31 02:30:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:30:02,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:02,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377468114] [2023-08-31 02:30:02,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377468114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:02,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352469211] [2023-08-31 02:30:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:30:02,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:02,243 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) [2023-08-31 02:30:02,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:30:02,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:30:02,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 02:30:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:02,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 02:30:02,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:30:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:30:02,602 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 02:30:02,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2023-08-31 02:30:02,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-31 02:30:02,699 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 02:30:02,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-31 02:30:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:30:02,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:03,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:30:03,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2023-08-31 02:30:03,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:30:03,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-08-31 02:30:03,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:30:03,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-08-31 02:30:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2023-08-31 02:30:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:30:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352469211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:09,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:09,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-31 02:30:09,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214464027] [2023-08-31 02:30:09,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:09,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:30:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:30:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-08-31 02:30:11,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:30:13,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:30:13,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-08-31 02:30:13,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 105 transitions, 1193 flow. Second operand has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:13,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:13,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-08-31 02:30:13,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:14,559 INFO L130 PetriNetUnfolder]: 718/1290 cut-off events. [2023-08-31 02:30:14,559 INFO L131 PetriNetUnfolder]: For 6344/6426 co-relation queries the response was YES. [2023-08-31 02:30:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 1290 events. 718/1290 cut-off events. For 6344/6426 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6847 event pairs, 123 based on Foata normal form. 50/1318 useless extension candidates. Maximal degree in co-relation 4513. Up to 662 conditions per place. [2023-08-31 02:30:14,569 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2023-08-31 02:30:14,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1947 flow [2023-08-31 02:30:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:30:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:30:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 966 transitions. [2023-08-31 02:30:14,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31672131147540983 [2023-08-31 02:30:14,573 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 966 transitions. [2023-08-31 02:30:14,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 966 transitions. [2023-08-31 02:30:14,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:14,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 966 transitions. [2023-08-31 02:30:14,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.6) internal successors, (966), 10 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:14,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:14,579 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:14,579 INFO L175 Difference]: Start difference. First operand has 68 places, 105 transitions, 1193 flow. Second operand 10 states and 966 transitions. [2023-08-31 02:30:14,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1947 flow [2023-08-31 02:30:14,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1894 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-31 02:30:14,595 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1396 flow [2023-08-31 02:30:14,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1396, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2023-08-31 02:30:14,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2023-08-31 02:30:14,596 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1396 flow [2023-08-31 02:30:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:14,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:14,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:14,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:14,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:30:14,810 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:14,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 888256042, now seen corresponding path program 4 times [2023-08-31 02:30:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793312341] [2023-08-31 02:30:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:14,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:14,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793312341] [2023-08-31 02:30:14,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793312341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:14,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523659733] [2023-08-31 02:30:14,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:30:14,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:14,925 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) [2023-08-31 02:30:14,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:30:15,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:30:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:15,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523659733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:15,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:30:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201181627] [2023-08-31 02:30:15,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:15,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:30:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:30:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:30:15,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:15,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:15,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:15,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:15,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:15,704 INFO L130 PetriNetUnfolder]: 877/1639 cut-off events. [2023-08-31 02:30:15,705 INFO L131 PetriNetUnfolder]: For 7648/7648 co-relation queries the response was YES. [2023-08-31 02:30:15,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 1639 events. 877/1639 cut-off events. For 7648/7648 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9255 event pairs, 22 based on Foata normal form. 32/1669 useless extension candidates. Maximal degree in co-relation 7782. Up to 665 conditions per place. [2023-08-31 02:30:15,717 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 105 changer transitions 23/285 dead transitions. [2023-08-31 02:30:15,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 285 transitions, 3529 flow [2023-08-31 02:30:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 02:30:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 02:30:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2699 transitions. [2023-08-31 02:30:15,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44245901639344265 [2023-08-31 02:30:15,724 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2699 transitions. [2023-08-31 02:30:15,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2699 transitions. [2023-08-31 02:30:15,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:15,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2699 transitions. [2023-08-31 02:30:15,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.95) internal successors, (2699), 20 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:15,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:15,738 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:15,738 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1396 flow. Second operand 20 states and 2699 transitions. [2023-08-31 02:30:15,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 285 transitions, 3529 flow [2023-08-31 02:30:15,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 285 transitions, 3259 flow, removed 115 selfloop flow, removed 5 redundant places. [2023-08-31 02:30:15,761 INFO L231 Difference]: Finished difference. Result has 103 places, 180 transitions, 2340 flow [2023-08-31 02:30:15,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2340, PETRI_PLACES=103, PETRI_TRANSITIONS=180} [2023-08-31 02:30:15,762 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2023-08-31 02:30:15,762 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 180 transitions, 2340 flow [2023-08-31 02:30:15,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.58333333333334) internal successors, (1579), 12 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:15,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:15,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:15,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:15,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 02:30:15,968 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:15,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -91606092, now seen corresponding path program 5 times [2023-08-31 02:30:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:15,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028733113] [2023-08-31 02:30:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:16,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028733113] [2023-08-31 02:30:16,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028733113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:16,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646469293] [2023-08-31 02:30:16,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:30:16,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:16,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:16,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:16,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:30:16,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:30:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646469293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:16,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:30:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531030126] [2023-08-31 02:30:16,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:30:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:30:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:30:16,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:16,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 180 transitions, 2340 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:16,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:16,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:16,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:16,808 INFO L130 PetriNetUnfolder]: 776/1509 cut-off events. [2023-08-31 02:30:16,808 INFO L131 PetriNetUnfolder]: For 13325/13325 co-relation queries the response was YES. [2023-08-31 02:30:16,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1509 events. 776/1509 cut-off events. For 13325/13325 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8780 event pairs, 96 based on Foata normal form. 64/1571 useless extension candidates. Maximal degree in co-relation 8613. Up to 762 conditions per place. [2023-08-31 02:30:16,821 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 95 changer transitions 1/253 dead transitions. [2023-08-31 02:30:16,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 253 transitions, 3517 flow [2023-08-31 02:30:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:30:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:30:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1904 transitions. [2023-08-31 02:30:16,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459016393442623 [2023-08-31 02:30:16,825 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1904 transitions. [2023-08-31 02:30:16,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1904 transitions. [2023-08-31 02:30:16,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:16,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1904 transitions. [2023-08-31 02:30:16,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:16,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:16,834 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:16,834 INFO L175 Difference]: Start difference. First operand has 103 places, 180 transitions, 2340 flow. Second operand 14 states and 1904 transitions. [2023-08-31 02:30:16,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 253 transitions, 3517 flow [2023-08-31 02:30:16,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 253 transitions, 3118 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-08-31 02:30:16,879 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2378 flow [2023-08-31 02:30:16,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2378, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2023-08-31 02:30:16,880 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2023-08-31 02:30:16,880 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2378 flow [2023-08-31 02:30:16,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:16,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:16,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:16,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 02:30:17,087 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:17,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1082840516, now seen corresponding path program 6 times [2023-08-31 02:30:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426589886] [2023-08-31 02:30:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426589886] [2023-08-31 02:30:17,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426589886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809198165] [2023-08-31 02:30:17,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:30:17,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:17,201 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:30:17,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:30:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:17,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809198165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:17,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:17,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:30:17,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125447716] [2023-08-31 02:30:17,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:17,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:30:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:17,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:30:17,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:30:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:17,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2378 flow. Second operand has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:17,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:17,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:17,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:18,155 INFO L130 PetriNetUnfolder]: 986/1971 cut-off events. [2023-08-31 02:30:18,155 INFO L131 PetriNetUnfolder]: For 19942/19942 co-relation queries the response was YES. [2023-08-31 02:30:18,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 1971 events. 986/1971 cut-off events. For 19942/19942 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12650 event pairs, 44 based on Foata normal form. 26/1995 useless extension candidates. Maximal degree in co-relation 10978. Up to 625 conditions per place. [2023-08-31 02:30:18,173 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 165 selfloop transitions, 153 changer transitions 14/332 dead transitions. [2023-08-31 02:30:18,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 4449 flow [2023-08-31 02:30:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 02:30:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 02:30:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3091 transitions. [2023-08-31 02:30:18,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406272273699216 [2023-08-31 02:30:18,178 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3091 transitions. [2023-08-31 02:30:18,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3091 transitions. [2023-08-31 02:30:18,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:18,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3091 transitions. [2023-08-31 02:30:18,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 134.3913043478261) internal successors, (3091), 23 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:18,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:18,190 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:18,190 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2378 flow. Second operand 23 states and 3091 transitions. [2023-08-31 02:30:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 4449 flow [2023-08-31 02:30:18,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 332 transitions, 4278 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-08-31 02:30:18,263 INFO L231 Difference]: Finished difference. Result has 139 places, 235 transitions, 3422 flow [2023-08-31 02:30:18,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3422, PETRI_PLACES=139, PETRI_TRANSITIONS=235} [2023-08-31 02:30:18,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-08-31 02:30:18,264 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 235 transitions, 3422 flow [2023-08-31 02:30:18,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:18,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:18,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:18,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 02:30:18,473 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:18,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash 549254058, now seen corresponding path program 7 times [2023-08-31 02:30:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:18,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868541720] [2023-08-31 02:30:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:18,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868541720] [2023-08-31 02:30:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868541720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745970608] [2023-08-31 02:30:18,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:30:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:18,572 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:18,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:30:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745970608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:18,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:18,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:30:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647474676] [2023-08-31 02:30:18,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:18,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:30:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:30:18,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:30:18,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:18,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 235 transitions, 3422 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:18,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:18,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:18,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:19,600 INFO L130 PetriNetUnfolder]: 1214/2390 cut-off events. [2023-08-31 02:30:19,601 INFO L131 PetriNetUnfolder]: For 42893/42893 co-relation queries the response was YES. [2023-08-31 02:30:19,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17251 conditions, 2390 events. 1214/2390 cut-off events. For 42893/42893 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15720 event pairs, 359 based on Foata normal form. 106/2494 useless extension candidates. Maximal degree in co-relation 16358. Up to 1604 conditions per place. [2023-08-31 02:30:19,631 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 239 selfloop transitions, 108 changer transitions 9/356 dead transitions. [2023-08-31 02:30:19,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 356 transitions, 5908 flow [2023-08-31 02:30:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:30:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:30:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1760 transitions. [2023-08-31 02:30:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44388398486759145 [2023-08-31 02:30:19,635 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1760 transitions. [2023-08-31 02:30:19,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1760 transitions. [2023-08-31 02:30:19,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:19,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1760 transitions. [2023-08-31 02:30:19,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 135.3846153846154) internal successors, (1760), 13 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:19,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:19,642 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:19,642 INFO L175 Difference]: Start difference. First operand has 139 places, 235 transitions, 3422 flow. Second operand 13 states and 1760 transitions. [2023-08-31 02:30:19,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 356 transitions, 5908 flow [2023-08-31 02:30:19,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 356 transitions, 5526 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-08-31 02:30:19,786 INFO L231 Difference]: Finished difference. Result has 149 places, 297 transitions, 4606 flow [2023-08-31 02:30:19,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4606, PETRI_PLACES=149, PETRI_TRANSITIONS=297} [2023-08-31 02:30:19,787 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2023-08-31 02:30:19,787 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 297 transitions, 4606 flow [2023-08-31 02:30:19,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:19,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:19,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:19,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:19,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:19,994 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:19,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:19,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1583947118, now seen corresponding path program 8 times [2023-08-31 02:30:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:19,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933176239] [2023-08-31 02:30:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:19,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933176239] [2023-08-31 02:30:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933176239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584623521] [2023-08-31 02:30:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:20,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:20,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:20,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:20,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:30:20,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:20,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:20,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584623521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:20,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:20,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:30:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847976416] [2023-08-31 02:30:20,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:20,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:20,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:20,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 297 transitions, 4606 flow. Second operand has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:20,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:20,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:20,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:21,123 INFO L130 PetriNetUnfolder]: 1393/2776 cut-off events. [2023-08-31 02:30:21,123 INFO L131 PetriNetUnfolder]: For 61103/61103 co-relation queries the response was YES. [2023-08-31 02:30:21,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21427 conditions, 2776 events. 1393/2776 cut-off events. For 61103/61103 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19103 event pairs, 164 based on Foata normal form. 48/2822 useless extension candidates. Maximal degree in co-relation 20398. Up to 1195 conditions per place. [2023-08-31 02:30:21,145 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 236 selfloop transitions, 196 changer transitions 8/440 dead transitions. [2023-08-31 02:30:21,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 440 transitions, 7324 flow [2023-08-31 02:30:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:30:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:30:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2042 transitions. [2023-08-31 02:30:21,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44633879781420766 [2023-08-31 02:30:21,149 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2042 transitions. [2023-08-31 02:30:21,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2042 transitions. [2023-08-31 02:30:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:21,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2042 transitions. [2023-08-31 02:30:21,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.13333333333333) internal successors, (2042), 15 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:21,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:21,157 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:21,158 INFO L175 Difference]: Start difference. First operand has 149 places, 297 transitions, 4606 flow. Second operand 15 states and 2042 transitions. [2023-08-31 02:30:21,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 440 transitions, 7324 flow [2023-08-31 02:30:21,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 440 transitions, 6822 flow, removed 213 selfloop flow, removed 5 redundant places. [2023-08-31 02:30:21,371 INFO L231 Difference]: Finished difference. Result has 163 places, 352 transitions, 5735 flow [2023-08-31 02:30:21,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5735, PETRI_PLACES=163, PETRI_TRANSITIONS=352} [2023-08-31 02:30:21,372 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-08-31 02:30:21,372 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 352 transitions, 5735 flow [2023-08-31 02:30:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:21,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:21,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:21,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-31 02:30:21,579 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:21,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1259303408, now seen corresponding path program 9 times [2023-08-31 02:30:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950710240] [2023-08-31 02:30:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:21,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:21,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950710240] [2023-08-31 02:30:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950710240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543137352] [2023-08-31 02:30:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:30:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:21,693 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:30:21,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:30:21,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:21,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543137352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:22,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:22,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:30:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320538511] [2023-08-31 02:30:22,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:22,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:22,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 352 transitions, 5735 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:22,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:22,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:22,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:22,922 INFO L130 PetriNetUnfolder]: 1523/3068 cut-off events. [2023-08-31 02:30:22,922 INFO L131 PetriNetUnfolder]: For 67917/67917 co-relation queries the response was YES. [2023-08-31 02:30:22,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24230 conditions, 3068 events. 1523/3068 cut-off events. For 67917/67917 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21664 event pairs, 297 based on Foata normal form. 32/3098 useless extension candidates. Maximal degree in co-relation 23704. Up to 1160 conditions per place. [2023-08-31 02:30:22,987 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 315 selfloop transitions, 143 changer transitions 1/459 dead transitions. [2023-08-31 02:30:22,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 459 transitions, 8229 flow [2023-08-31 02:30:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:30:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:30:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2429 transitions. [2023-08-31 02:30:22,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424408014571949 [2023-08-31 02:30:22,992 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2429 transitions. [2023-08-31 02:30:22,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2429 transitions. [2023-08-31 02:30:22,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:22,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2429 transitions. [2023-08-31 02:30:22,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.94444444444446) internal successors, (2429), 18 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:23,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:23,002 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:23,003 INFO L175 Difference]: Start difference. First operand has 163 places, 352 transitions, 5735 flow. Second operand 18 states and 2429 transitions. [2023-08-31 02:30:23,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 459 transitions, 8229 flow [2023-08-31 02:30:23,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 459 transitions, 7952 flow, removed 97 selfloop flow, removed 8 redundant places. [2023-08-31 02:30:23,284 INFO L231 Difference]: Finished difference. Result has 179 places, 396 transitions, 6915 flow [2023-08-31 02:30:23,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6915, PETRI_PLACES=179, PETRI_TRANSITIONS=396} [2023-08-31 02:30:23,285 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-08-31 02:30:23,285 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 396 transitions, 6915 flow [2023-08-31 02:30:23,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:23,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:23,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:23,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:23,492 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:23,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1724744702, now seen corresponding path program 10 times [2023-08-31 02:30:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515749670] [2023-08-31 02:30:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:23,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:23,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515749670] [2023-08-31 02:30:23,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515749670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:23,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769313986] [2023-08-31 02:30:23,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:30:23,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:23,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:23,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:23,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:30:23,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:30:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:23,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769313986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:23,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:23,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:30:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572902858] [2023-08-31 02:30:23,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:30:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:30:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:30:23,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:23,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 396 transitions, 6915 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:23,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:23,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:23,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:24,876 INFO L130 PetriNetUnfolder]: 1832/3646 cut-off events. [2023-08-31 02:30:24,876 INFO L131 PetriNetUnfolder]: For 101548/101548 co-relation queries the response was YES. [2023-08-31 02:30:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31331 conditions, 3646 events. 1832/3646 cut-off events. For 101548/101548 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26424 event pairs, 138 based on Foata normal form. 102/3746 useless extension candidates. Maximal degree in co-relation 30200. Up to 2646 conditions per place. [2023-08-31 02:30:24,901 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 409 selfloop transitions, 137 changer transitions 3/549 dead transitions. [2023-08-31 02:30:24,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 549 transitions, 10945 flow [2023-08-31 02:30:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:30:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:30:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2295 transitions. [2023-08-31 02:30:24,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-08-31 02:30:24,905 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2295 transitions. [2023-08-31 02:30:24,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2295 transitions. [2023-08-31 02:30:24,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:24,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2295 transitions. [2023-08-31 02:30:24,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 135.0) internal successors, (2295), 17 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:24,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:24,916 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:24,917 INFO L175 Difference]: Start difference. First operand has 179 places, 396 transitions, 6915 flow. Second operand 17 states and 2295 transitions. [2023-08-31 02:30:24,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 549 transitions, 10945 flow [2023-08-31 02:30:25,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 549 transitions, 10043 flow, removed 425 selfloop flow, removed 4 redundant places. [2023-08-31 02:30:25,443 INFO L231 Difference]: Finished difference. Result has 200 places, 485 transitions, 8615 flow [2023-08-31 02:30:25,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8615, PETRI_PLACES=200, PETRI_TRANSITIONS=485} [2023-08-31 02:30:25,444 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 178 predicate places. [2023-08-31 02:30:25,444 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 485 transitions, 8615 flow [2023-08-31 02:30:25,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:25,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:25,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:25,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 02:30:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:25,645 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:25,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:25,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2117583292, now seen corresponding path program 11 times [2023-08-31 02:30:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091217107] [2023-08-31 02:30:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091217107] [2023-08-31 02:30:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091217107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706534320] [2023-08-31 02:30:25,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:30:25,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:25,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:25,824 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:25,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:30:25,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:30:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-31 02:30:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706534320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:26,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:26,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:30:26,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435043892] [2023-08-31 02:30:26,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:26,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:26,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 485 transitions, 8615 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:26,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:26,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:26,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:26,982 INFO L130 PetriNetUnfolder]: 1769/3508 cut-off events. [2023-08-31 02:30:26,982 INFO L131 PetriNetUnfolder]: For 78917/78917 co-relation queries the response was YES. [2023-08-31 02:30:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27970 conditions, 3508 events. 1769/3508 cut-off events. For 78917/78917 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25293 event pairs, 647 based on Foata normal form. 64/3566 useless extension candidates. Maximal degree in co-relation 27125. Up to 3017 conditions per place. [2023-08-31 02:30:27,007 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 440 selfloop transitions, 79 changer transitions 4/523 dead transitions. [2023-08-31 02:30:27,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 523 transitions, 10109 flow [2023-08-31 02:30:27,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:30:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:30:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1498 transitions. [2023-08-31 02:30:27,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464977645305514 [2023-08-31 02:30:27,011 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1498 transitions. [2023-08-31 02:30:27,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1498 transitions. [2023-08-31 02:30:27,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:27,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1498 transitions. [2023-08-31 02:30:27,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 136.1818181818182) internal successors, (1498), 11 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:27,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:27,017 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:27,017 INFO L175 Difference]: Start difference. First operand has 200 places, 485 transitions, 8615 flow. Second operand 11 states and 1498 transitions. [2023-08-31 02:30:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 523 transitions, 10109 flow [2023-08-31 02:30:27,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 523 transitions, 8947 flow, removed 540 selfloop flow, removed 6 redundant places. [2023-08-31 02:30:27,515 INFO L231 Difference]: Finished difference. Result has 206 places, 480 transitions, 7740 flow [2023-08-31 02:30:27,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7740, PETRI_PLACES=206, PETRI_TRANSITIONS=480} [2023-08-31 02:30:27,517 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 184 predicate places. [2023-08-31 02:30:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 480 transitions, 7740 flow [2023-08-31 02:30:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:27,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:27,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:27,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:27,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 02:30:27,723 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:27,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:27,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2036636136, now seen corresponding path program 12 times [2023-08-31 02:30:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800760869] [2023-08-31 02:30:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:27,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800760869] [2023-08-31 02:30:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800760869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822797503] [2023-08-31 02:30:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:30:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:27,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:27,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:30:27,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:30:27,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:27,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:28,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:28,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822797503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:28,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:28,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:30:28,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874025294] [2023-08-31 02:30:28,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:28,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:30:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:30:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:30:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:28,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 480 transitions, 7740 flow. Second operand has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:28,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:28,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:29,181 INFO L130 PetriNetUnfolder]: 1928/3848 cut-off events. [2023-08-31 02:30:29,181 INFO L131 PetriNetUnfolder]: For 79928/79928 co-relation queries the response was YES. [2023-08-31 02:30:29,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29442 conditions, 3848 events. 1928/3848 cut-off events. For 79928/79928 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28529 event pairs, 362 based on Foata normal form. 30/3872 useless extension candidates. Maximal degree in co-relation 28715. Up to 1471 conditions per place. [2023-08-31 02:30:29,208 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 397 selfloop transitions, 189 changer transitions 15/601 dead transitions. [2023-08-31 02:30:29,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 601 transitions, 10779 flow [2023-08-31 02:30:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:30:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:30:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2820 transitions. [2023-08-31 02:30:29,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-08-31 02:30:29,213 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2820 transitions. [2023-08-31 02:30:29,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2820 transitions. [2023-08-31 02:30:29,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:29,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2820 transitions. [2023-08-31 02:30:29,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.28571428571428) internal successors, (2820), 21 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:29,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:29,221 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:29,222 INFO L175 Difference]: Start difference. First operand has 206 places, 480 transitions, 7740 flow. Second operand 21 states and 2820 transitions. [2023-08-31 02:30:29,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 601 transitions, 10779 flow [2023-08-31 02:30:29,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 601 transitions, 10635 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-31 02:30:29,620 INFO L231 Difference]: Finished difference. Result has 227 places, 520 transitions, 9207 flow [2023-08-31 02:30:29,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=7604, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9207, PETRI_PLACES=227, PETRI_TRANSITIONS=520} [2023-08-31 02:30:29,621 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 205 predicate places. [2023-08-31 02:30:29,621 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 520 transitions, 9207 flow [2023-08-31 02:30:29,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:29,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:29,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:29,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:29,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:29,828 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:29,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2051305598, now seen corresponding path program 13 times [2023-08-31 02:30:29,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:29,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245744284] [2023-08-31 02:30:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:29,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:29,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245744284] [2023-08-31 02:30:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245744284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975706611] [2023-08-31 02:30:29,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:30:29,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:29,921 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:29,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 02:30:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:30,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975706611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:30,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:30,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:30:30,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270266000] [2023-08-31 02:30:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:30,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:30:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:30,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:30:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:30:30,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:30,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 520 transitions, 9207 flow. Second operand has 11 states, 11 states have (on average 131.63636363636363) internal successors, (1448), 11 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:30,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:30,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:30,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:31,204 INFO L130 PetriNetUnfolder]: 2163/4247 cut-off events. [2023-08-31 02:30:31,204 INFO L131 PetriNetUnfolder]: For 111446/111446 co-relation queries the response was YES. [2023-08-31 02:30:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35121 conditions, 4247 events. 2163/4247 cut-off events. For 111446/111446 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31539 event pairs, 136 based on Foata normal form. 40/4281 useless extension candidates. Maximal degree in co-relation 34197. Up to 2877 conditions per place. [2023-08-31 02:30:31,234 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 460 selfloop transitions, 160 changer transitions 0/620 dead transitions. [2023-08-31 02:30:31,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 620 transitions, 12267 flow [2023-08-31 02:30:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:30:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:30:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 954 transitions. [2023-08-31 02:30:31,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468384074941452 [2023-08-31 02:30:31,236 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 954 transitions. [2023-08-31 02:30:31,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 954 transitions. [2023-08-31 02:30:31,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:31,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 954 transitions. [2023-08-31 02:30:31,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.28571428571428) internal successors, (954), 7 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:31,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:31,240 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:31,240 INFO L175 Difference]: Start difference. First operand has 227 places, 520 transitions, 9207 flow. Second operand 7 states and 954 transitions. [2023-08-31 02:30:31,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 620 transitions, 12267 flow [2023-08-31 02:30:31,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 620 transitions, 11603 flow, removed 296 selfloop flow, removed 8 redundant places. [2023-08-31 02:30:31,839 INFO L231 Difference]: Finished difference. Result has 227 places, 562 transitions, 10024 flow [2023-08-31 02:30:31,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=8555, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10024, PETRI_PLACES=227, PETRI_TRANSITIONS=562} [2023-08-31 02:30:31,839 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 205 predicate places. [2023-08-31 02:30:31,839 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 562 transitions, 10024 flow [2023-08-31 02:30:31,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.63636363636363) internal successors, (1448), 11 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:31,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:31,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:31,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:32,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:32,040 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:32,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash -341483624, now seen corresponding path program 14 times [2023-08-31 02:30:32,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:32,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906989448] [2023-08-31 02:30:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:32,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906989448] [2023-08-31 02:30:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906989448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:32,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931241891] [2023-08-31 02:30:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:32,133 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:32,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 02:30:32,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:32,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931241891] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:32,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:30:32,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418499223] [2023-08-31 02:30:32,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:32,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 562 transitions, 10024 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:32,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:32,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:32,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:33,615 INFO L130 PetriNetUnfolder]: 2267/4471 cut-off events. [2023-08-31 02:30:33,616 INFO L131 PetriNetUnfolder]: For 116048/116048 co-relation queries the response was YES. [2023-08-31 02:30:33,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36975 conditions, 4471 events. 2267/4471 cut-off events. For 116048/116048 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33687 event pairs, 739 based on Foata normal form. 48/4515 useless extension candidates. Maximal degree in co-relation 36047. Up to 3364 conditions per place. [2023-08-31 02:30:33,650 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 492 selfloop transitions, 152 changer transitions 4/648 dead transitions. [2023-08-31 02:30:33,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 648 transitions, 12746 flow [2023-08-31 02:30:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:30:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:30:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1634 transitions. [2023-08-31 02:30:33,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446448087431694 [2023-08-31 02:30:33,653 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1634 transitions. [2023-08-31 02:30:33,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1634 transitions. [2023-08-31 02:30:33,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:33,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1634 transitions. [2023-08-31 02:30:33,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 136.16666666666666) internal successors, (1634), 12 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:33,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:33,658 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:33,659 INFO L175 Difference]: Start difference. First operand has 227 places, 562 transitions, 10024 flow. Second operand 12 states and 1634 transitions. [2023-08-31 02:30:33,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 648 transitions, 12746 flow [2023-08-31 02:30:34,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 648 transitions, 12573 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-08-31 02:30:34,276 INFO L231 Difference]: Finished difference. Result has 239 places, 590 transitions, 11061 flow [2023-08-31 02:30:34,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=9859, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11061, PETRI_PLACES=239, PETRI_TRANSITIONS=590} [2023-08-31 02:30:34,277 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 217 predicate places. [2023-08-31 02:30:34,277 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 590 transitions, 11061 flow [2023-08-31 02:30:34,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:34,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:34,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:34,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:34,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:34,484 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:34,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1232509748, now seen corresponding path program 15 times [2023-08-31 02:30:34,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:34,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829136549] [2023-08-31 02:30:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829136549] [2023-08-31 02:30:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829136549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:34,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401314475] [2023-08-31 02:30:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:30:34,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:34,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:34,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:34,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 02:30:34,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:30:34,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:34,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401314475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:34,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:34,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 02:30:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832856895] [2023-08-31 02:30:34,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:34,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:34,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:34,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 590 transitions, 11061 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:34,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:34,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:34,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:36,333 INFO L130 PetriNetUnfolder]: 2262/4525 cut-off events. [2023-08-31 02:30:36,334 INFO L131 PetriNetUnfolder]: For 125704/125704 co-relation queries the response was YES. [2023-08-31 02:30:36,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38560 conditions, 4525 events. 2262/4525 cut-off events. For 125704/125704 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34792 event pairs, 458 based on Foata normal form. 10/4533 useless extension candidates. Maximal degree in co-relation 37601. Up to 1835 conditions per place. [2023-08-31 02:30:36,446 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 450 selfloop transitions, 214 changer transitions 7/671 dead transitions. [2023-08-31 02:30:36,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 671 transitions, 13532 flow [2023-08-31 02:30:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:30:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:30:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2420 transitions. [2023-08-31 02:30:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408014571948998 [2023-08-31 02:30:36,449 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2420 transitions. [2023-08-31 02:30:36,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2420 transitions. [2023-08-31 02:30:36,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:36,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2420 transitions. [2023-08-31 02:30:36,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.44444444444446) internal successors, (2420), 18 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:36,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:36,454 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:36,454 INFO L175 Difference]: Start difference. First operand has 239 places, 590 transitions, 11061 flow. Second operand 18 states and 2420 transitions. [2023-08-31 02:30:36,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 671 transitions, 13532 flow [2023-08-31 02:30:37,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 671 transitions, 13231 flow, removed 128 selfloop flow, removed 4 redundant places. [2023-08-31 02:30:37,177 INFO L231 Difference]: Finished difference. Result has 257 places, 599 transitions, 11611 flow [2023-08-31 02:30:37,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10778, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11611, PETRI_PLACES=257, PETRI_TRANSITIONS=599} [2023-08-31 02:30:37,178 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 235 predicate places. [2023-08-31 02:30:37,178 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 599 transitions, 11611 flow [2023-08-31 02:30:37,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:37,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:37,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:37,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 02:30:37,380 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:37,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 698923290, now seen corresponding path program 16 times [2023-08-31 02:30:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275169079] [2023-08-31 02:30:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275169079] [2023-08-31 02:30:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275169079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780183709] [2023-08-31 02:30:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:30:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:37,485 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:37,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 02:30:37,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:30:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:37,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780183709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:37,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 02:30:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985926773] [2023-08-31 02:30:37,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:37,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:37,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 599 transitions, 11611 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:37,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:37,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:39,245 INFO L130 PetriNetUnfolder]: 2419/4783 cut-off events. [2023-08-31 02:30:39,245 INFO L131 PetriNetUnfolder]: For 149360/149360 co-relation queries the response was YES. [2023-08-31 02:30:39,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42587 conditions, 4783 events. 2419/4783 cut-off events. For 149360/149360 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 36551 event pairs, 206 based on Foata normal form. 18/4799 useless extension candidates. Maximal degree in co-relation 41551. Up to 3941 conditions per place. [2023-08-31 02:30:39,293 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 551 selfloop transitions, 139 changer transitions 4/694 dead transitions. [2023-08-31 02:30:39,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 694 transitions, 14669 flow [2023-08-31 02:30:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:30:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:30:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1479 transitions. [2023-08-31 02:30:39,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408345752608048 [2023-08-31 02:30:39,296 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1479 transitions. [2023-08-31 02:30:39,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1479 transitions. [2023-08-31 02:30:39,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:39,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1479 transitions. [2023-08-31 02:30:39,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:39,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:39,301 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:39,301 INFO L175 Difference]: Start difference. First operand has 257 places, 599 transitions, 11611 flow. Second operand 11 states and 1479 transitions. [2023-08-31 02:30:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 694 transitions, 14669 flow [2023-08-31 02:30:40,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 694 transitions, 14109 flow, removed 138 selfloop flow, removed 7 redundant places. [2023-08-31 02:30:40,173 INFO L231 Difference]: Finished difference. Result has 264 places, 654 transitions, 12498 flow [2023-08-31 02:30:40,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12498, PETRI_PLACES=264, PETRI_TRANSITIONS=654} [2023-08-31 02:30:40,174 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 242 predicate places. [2023-08-31 02:30:40,174 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 654 transitions, 12498 flow [2023-08-31 02:30:40,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:40,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:40,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:40,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-31 02:30:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 02:30:40,380 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:40,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 575743984, now seen corresponding path program 17 times [2023-08-31 02:30:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158236848] [2023-08-31 02:30:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:40,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158236848] [2023-08-31 02:30:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158236848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400987462] [2023-08-31 02:30:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:30:40,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:40,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:40,476 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:40,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 02:30:40,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:40,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:40,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:40,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:40,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400987462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:40,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:40,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:30:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075909802] [2023-08-31 02:30:40,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:40,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:30:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:30:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:30:40,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:40,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 654 transitions, 12498 flow. Second operand has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:40,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:40,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:42,106 INFO L130 PetriNetUnfolder]: 2401/4749 cut-off events. [2023-08-31 02:30:42,106 INFO L131 PetriNetUnfolder]: For 151634/151634 co-relation queries the response was YES. [2023-08-31 02:30:42,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42970 conditions, 4749 events. 2401/4749 cut-off events. For 151634/151634 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36455 event pairs, 576 based on Foata normal form. 6/4753 useless extension candidates. Maximal degree in co-relation 42326. Up to 2123 conditions per place. [2023-08-31 02:30:42,148 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 528 selfloop transitions, 158 changer transitions 12/698 dead transitions. [2023-08-31 02:30:42,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 698 transitions, 14459 flow [2023-08-31 02:30:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:30:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:30:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1481 transitions. [2023-08-31 02:30:42,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44143070044709387 [2023-08-31 02:30:42,150 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1481 transitions. [2023-08-31 02:30:42,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1481 transitions. [2023-08-31 02:30:42,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:42,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1481 transitions. [2023-08-31 02:30:42,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.63636363636363) internal successors, (1481), 11 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:42,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:42,154 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:42,154 INFO L175 Difference]: Start difference. First operand has 264 places, 654 transitions, 12498 flow. Second operand 11 states and 1481 transitions. [2023-08-31 02:30:42,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 698 transitions, 14459 flow [2023-08-31 02:30:43,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 698 transitions, 14099 flow, removed 140 selfloop flow, removed 4 redundant places. [2023-08-31 02:30:43,058 INFO L231 Difference]: Finished difference. Result has 274 places, 654 transitions, 12570 flow [2023-08-31 02:30:43,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12142, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12570, PETRI_PLACES=274, PETRI_TRANSITIONS=654} [2023-08-31 02:30:43,059 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2023-08-31 02:30:43,059 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 654 transitions, 12570 flow [2023-08-31 02:30:43,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.45454545454547) internal successors, (1446), 11 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:43,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:43,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:43,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-31 02:30:43,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 02:30:43,262 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:43,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1367305036, now seen corresponding path program 18 times [2023-08-31 02:30:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471784948] [2023-08-31 02:30:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:43,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:43,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471784948] [2023-08-31 02:30:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471784948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184290905] [2023-08-31 02:30:43,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:30:43,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:43,361 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:43,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 02:30:43,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:30:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:43,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184290905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:43,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:30:43,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188880979] [2023-08-31 02:30:43,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:30:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:30:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:30:43,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:43,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 654 transitions, 12570 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:43,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:43,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:43,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:45,292 INFO L130 PetriNetUnfolder]: 2507/4955 cut-off events. [2023-08-31 02:30:45,292 INFO L131 PetriNetUnfolder]: For 173759/173759 co-relation queries the response was YES. [2023-08-31 02:30:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46280 conditions, 4955 events. 2507/4955 cut-off events. For 173759/173759 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38305 event pairs, 612 based on Foata normal form. 36/4989 useless extension candidates. Maximal degree in co-relation 45858. Up to 2994 conditions per place. [2023-08-31 02:30:45,342 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 490 selfloop transitions, 254 changer transitions 3/747 dead transitions. [2023-08-31 02:30:45,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 747 transitions, 15841 flow [2023-08-31 02:30:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:30:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:30:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1775 transitions. [2023-08-31 02:30:45,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44766708701134933 [2023-08-31 02:30:45,345 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1775 transitions. [2023-08-31 02:30:45,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1775 transitions. [2023-08-31 02:30:45,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:45,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1775 transitions. [2023-08-31 02:30:45,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.53846153846155) internal successors, (1775), 13 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:45,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:45,352 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:45,352 INFO L175 Difference]: Start difference. First operand has 274 places, 654 transitions, 12570 flow. Second operand 13 states and 1775 transitions. [2023-08-31 02:30:45,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 747 transitions, 15841 flow [2023-08-31 02:30:46,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 747 transitions, 15431 flow, removed 43 selfloop flow, removed 12 redundant places. [2023-08-31 02:30:46,341 INFO L231 Difference]: Finished difference. Result has 277 places, 677 transitions, 13773 flow [2023-08-31 02:30:46,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13773, PETRI_PLACES=277, PETRI_TRANSITIONS=677} [2023-08-31 02:30:46,341 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2023-08-31 02:30:46,341 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 677 transitions, 13773 flow [2023-08-31 02:30:46,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:46,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:46,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:46,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:46,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:46,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:46,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382376, now seen corresponding path program 19 times [2023-08-31 02:30:46,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:46,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771135899] [2023-08-31 02:30:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771135899] [2023-08-31 02:30:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771135899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:46,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041776825] [2023-08-31 02:30:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:30:46,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:46,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:46,633 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 02:30:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041776825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:46,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:46,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:30:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083896126] [2023-08-31 02:30:46,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:46,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:30:46,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:30:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:30:46,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:46,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 677 transitions, 13773 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:46,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:46,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:46,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:48,656 INFO L130 PetriNetUnfolder]: 2497/4932 cut-off events. [2023-08-31 02:30:48,656 INFO L131 PetriNetUnfolder]: For 169582/169582 co-relation queries the response was YES. [2023-08-31 02:30:48,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46523 conditions, 4932 events. 2497/4932 cut-off events. For 169582/169582 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38079 event pairs, 435 based on Foata normal form. 18/4948 useless extension candidates. Maximal degree in co-relation 46102. Up to 1846 conditions per place. [2023-08-31 02:30:48,702 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 480 selfloop transitions, 266 changer transitions 2/748 dead transitions. [2023-08-31 02:30:48,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 748 transitions, 16345 flow [2023-08-31 02:30:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:30:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:30:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2425 transitions. [2023-08-31 02:30:48,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44171220400728595 [2023-08-31 02:30:48,707 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2425 transitions. [2023-08-31 02:30:48,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2425 transitions. [2023-08-31 02:30:48,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:48,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2425 transitions. [2023-08-31 02:30:48,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.72222222222223) internal successors, (2425), 18 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:48,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:48,716 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:48,716 INFO L175 Difference]: Start difference. First operand has 277 places, 677 transitions, 13773 flow. Second operand 18 states and 2425 transitions. [2023-08-31 02:30:48,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 748 transitions, 16345 flow [2023-08-31 02:30:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 748 transitions, 15817 flow, removed 134 selfloop flow, removed 9 redundant places. [2023-08-31 02:30:49,683 INFO L231 Difference]: Finished difference. Result has 287 places, 680 transitions, 14227 flow [2023-08-31 02:30:49,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13224, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14227, PETRI_PLACES=287, PETRI_TRANSITIONS=680} [2023-08-31 02:30:49,685 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 265 predicate places. [2023-08-31 02:30:49,685 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 680 transitions, 14227 flow [2023-08-31 02:30:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:49,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:49,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:49,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:49,891 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:49,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash -38087487, now seen corresponding path program 20 times [2023-08-31 02:30:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170610175] [2023-08-31 02:30:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:30:50,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170610175] [2023-08-31 02:30:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170610175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214605872] [2023-08-31 02:30:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:30:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:50,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:50,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 02:30:50,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:30:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 02:30:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:50,824 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2023-08-31 02:30:50,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2023-08-31 02:30:50,865 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 02:30:50,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 02:30:50,953 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-31 02:30:50,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2023-08-31 02:30:50,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-31 02:30:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:50,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:51,004 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1143 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1143) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2023-08-31 02:30:51,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:30:51,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-08-31 02:30:51,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-31 02:30:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:30:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214605872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:51,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:51,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2023-08-31 02:30:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943157328] [2023-08-31 02:30:51,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:51,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:30:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:30:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2023-08-31 02:30:51,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 305 [2023-08-31 02:30:51,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 680 transitions, 14227 flow. Second operand has 18 states, 18 states have (on average 90.11111111111111) internal successors, (1622), 18 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:51,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:51,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 305 [2023-08-31 02:30:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:53,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-31 02:30:55,082 INFO L130 PetriNetUnfolder]: 2739/5461 cut-off events. [2023-08-31 02:30:55,082 INFO L131 PetriNetUnfolder]: For 197740/197817 co-relation queries the response was YES. [2023-08-31 02:30:55,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52234 conditions, 5461 events. 2739/5461 cut-off events. For 197740/197817 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43309 event pairs, 204 based on Foata normal form. 55/5493 useless extension candidates. Maximal degree in co-relation 51811. Up to 4460 conditions per place. [2023-08-31 02:30:55,151 INFO L137 encePairwiseOnDemand]: 293/305 looper letters, 630 selfloop transitions, 220 changer transitions 22/880 dead transitions. [2023-08-31 02:30:55,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 880 transitions, 19443 flow [2023-08-31 02:30:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:30:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:30:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1679 transitions. [2023-08-31 02:30:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3058287795992714 [2023-08-31 02:30:55,154 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1679 transitions. [2023-08-31 02:30:55,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1679 transitions. [2023-08-31 02:30:55,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:55,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1679 transitions. [2023-08-31 02:30:55,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.27777777777777) internal successors, (1679), 18 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:55,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:55,161 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:55,161 INFO L175 Difference]: Start difference. First operand has 287 places, 680 transitions, 14227 flow. Second operand 18 states and 1679 transitions. [2023-08-31 02:30:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 880 transitions, 19443 flow [2023-08-31 02:30:56,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 880 transitions, 18834 flow, removed 130 selfloop flow, removed 12 redundant places. [2023-08-31 02:30:56,726 INFO L231 Difference]: Finished difference. Result has 299 places, 808 transitions, 17161 flow [2023-08-31 02:30:56,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13731, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=17161, PETRI_PLACES=299, PETRI_TRANSITIONS=808} [2023-08-31 02:30:56,728 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 277 predicate places. [2023-08-31 02:30:56,728 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 808 transitions, 17161 flow [2023-08-31 02:30:56,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 90.11111111111111) internal successors, (1622), 18 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:56,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:30:56,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:30:56,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 02:30:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 02:30:56,934 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:30:56,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:30:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1267341075, now seen corresponding path program 21 times [2023-08-31 02:30:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:30:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159257280] [2023-08-31 02:30:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:30:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:30:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:30:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:57,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:30:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159257280] [2023-08-31 02:30:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159257280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:30:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899297797] [2023-08-31 02:30:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:30:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:30:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:30:57,025 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:30:57,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 02:30:57,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:30:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:30:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:30:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:30:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:57,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:30:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:30:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899297797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:30:57,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:30:57,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:30:57,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907520719] [2023-08-31 02:30:57,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:30:57,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:30:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:30:57,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:30:57,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:30:57,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:30:57,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 808 transitions, 17161 flow. Second operand has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:57,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:30:57,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:30:57,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:30:59,608 INFO L130 PetriNetUnfolder]: 2793/5672 cut-off events. [2023-08-31 02:30:59,608 INFO L131 PetriNetUnfolder]: For 192707/192707 co-relation queries the response was YES. [2023-08-31 02:30:59,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53863 conditions, 5672 events. 2793/5672 cut-off events. For 192707/192707 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 45847 event pairs, 517 based on Foata normal form. 28/5698 useless extension candidates. Maximal degree in co-relation 53425. Up to 2966 conditions per place. [2023-08-31 02:30:59,670 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 716 selfloop transitions, 241 changer transitions 70/1027 dead transitions. [2023-08-31 02:30:59,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1027 transitions, 23218 flow [2023-08-31 02:30:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:30:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:30:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2273 transitions. [2023-08-31 02:30:59,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43837994214079073 [2023-08-31 02:30:59,673 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2273 transitions. [2023-08-31 02:30:59,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2273 transitions. [2023-08-31 02:30:59,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:30:59,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2273 transitions. [2023-08-31 02:30:59,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.7058823529412) internal successors, (2273), 17 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:59,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:59,679 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:30:59,679 INFO L175 Difference]: Start difference. First operand has 299 places, 808 transitions, 17161 flow. Second operand 17 states and 2273 transitions. [2023-08-31 02:30:59,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1027 transitions, 23218 flow [2023-08-31 02:31:01,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1027 transitions, 22813 flow, removed 185 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:01,355 INFO L231 Difference]: Finished difference. Result has 317 places, 898 transitions, 19563 flow [2023-08-31 02:31:01,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=16537, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19563, PETRI_PLACES=317, PETRI_TRANSITIONS=898} [2023-08-31 02:31:01,355 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 295 predicate places. [2023-08-31 02:31:01,355 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 898 transitions, 19563 flow [2023-08-31 02:31:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.6153846153846) internal successors, (1711), 13 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:01,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:01,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:01,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:01,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-31 02:31:01,557 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:01,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1126237599, now seen corresponding path program 22 times [2023-08-31 02:31:01,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:01,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995984919] [2023-08-31 02:31:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:01,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:01,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995984919] [2023-08-31 02:31:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995984919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124873171] [2023-08-31 02:31:01,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:31:01,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:01,649 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:01,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 02:31:01,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:31:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:01,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:01,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124873171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:01,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:31:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590474438] [2023-08-31 02:31:01,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:31:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:31:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:31:01,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:01,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 898 transitions, 19563 flow. Second operand has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:01,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:01,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:01,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:03,995 INFO L130 PetriNetUnfolder]: 2617/5352 cut-off events. [2023-08-31 02:31:03,995 INFO L131 PetriNetUnfolder]: For 200051/200051 co-relation queries the response was YES. [2023-08-31 02:31:04,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53709 conditions, 5352 events. 2617/5352 cut-off events. For 200051/200051 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 43386 event pairs, 72 based on Foata normal form. 28/5378 useless extension candidates. Maximal degree in co-relation 53207. Up to 2237 conditions per place. [2023-08-31 02:31:04,048 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 639 selfloop transitions, 339 changer transitions 9/987 dead transitions. [2023-08-31 02:31:04,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 987 transitions, 23200 flow [2023-08-31 02:31:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:31:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:31:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2805 transitions. [2023-08-31 02:31:04,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379391100702576 [2023-08-31 02:31:04,051 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2805 transitions. [2023-08-31 02:31:04,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2805 transitions. [2023-08-31 02:31:04,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:04,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2805 transitions. [2023-08-31 02:31:04,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 133.57142857142858) internal successors, (2805), 21 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:04,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:04,059 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:04,059 INFO L175 Difference]: Start difference. First operand has 317 places, 898 transitions, 19563 flow. Second operand 21 states and 2805 transitions. [2023-08-31 02:31:04,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 987 transitions, 23200 flow [2023-08-31 02:31:05,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 987 transitions, 22258 flow, removed 424 selfloop flow, removed 3 redundant places. [2023-08-31 02:31:05,737 INFO L231 Difference]: Finished difference. Result has 338 places, 916 transitions, 20114 flow [2023-08-31 02:31:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18465, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20114, PETRI_PLACES=338, PETRI_TRANSITIONS=916} [2023-08-31 02:31:05,738 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 316 predicate places. [2023-08-31 02:31:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 916 transitions, 20114 flow [2023-08-31 02:31:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.46153846153845) internal successors, (1709), 13 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:05,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:05,941 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:05,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1030661147, now seen corresponding path program 23 times [2023-08-31 02:31:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342819508] [2023-08-31 02:31:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:06,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342819508] [2023-08-31 02:31:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342819508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853574571] [2023-08-31 02:31:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:31:06,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:06,025 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:06,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 02:31:06,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:31:06,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:06,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853574571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:06,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:31:06,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720184851] [2023-08-31 02:31:06,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:06,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:31:06,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:06,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:31:06,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:31:06,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:06,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 916 transitions, 20114 flow. Second operand has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:06,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:06,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:06,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:08,671 INFO L130 PetriNetUnfolder]: 2725/5575 cut-off events. [2023-08-31 02:31:08,671 INFO L131 PetriNetUnfolder]: For 213856/213856 co-relation queries the response was YES. [2023-08-31 02:31:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56731 conditions, 5575 events. 2725/5575 cut-off events. For 213856/213856 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 45349 event pairs, 152 based on Foata normal form. 52/5625 useless extension candidates. Maximal degree in co-relation 56113. Up to 3480 conditions per place. [2023-08-31 02:31:08,734 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 669 selfloop transitions, 354 changer transitions 2/1025 dead transitions. [2023-08-31 02:31:08,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1025 transitions, 24586 flow [2023-08-31 02:31:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 02:31:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 02:31:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1894 transitions. [2023-08-31 02:31:08,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44355971896955504 [2023-08-31 02:31:08,737 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1894 transitions. [2023-08-31 02:31:08,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1894 transitions. [2023-08-31 02:31:08,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:08,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1894 transitions. [2023-08-31 02:31:08,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 135.28571428571428) internal successors, (1894), 14 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:08,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:08,742 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:08,742 INFO L175 Difference]: Start difference. First operand has 338 places, 916 transitions, 20114 flow. Second operand 14 states and 1894 transitions. [2023-08-31 02:31:08,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1025 transitions, 24586 flow [2023-08-31 02:31:10,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1025 transitions, 23853 flow, removed 319 selfloop flow, removed 4 redundant places. [2023-08-31 02:31:10,448 INFO L231 Difference]: Finished difference. Result has 350 places, 951 transitions, 21601 flow [2023-08-31 02:31:10,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=19370, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21601, PETRI_PLACES=350, PETRI_TRANSITIONS=951} [2023-08-31 02:31:10,449 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 328 predicate places. [2023-08-31 02:31:10,449 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 951 transitions, 21601 flow [2023-08-31 02:31:10,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:10,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:10,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:10,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:10,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:10,650 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:10,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1647919629, now seen corresponding path program 24 times [2023-08-31 02:31:10,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:10,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450544221] [2023-08-31 02:31:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450544221] [2023-08-31 02:31:10,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450544221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886191197] [2023-08-31 02:31:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:31:10,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:10,729 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:10,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 02:31:10,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:31:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:10,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:31:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886191197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:11,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:11,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:31:11,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197449361] [2023-08-31 02:31:11,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:11,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:31:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:31:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:31:11,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:11,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 951 transitions, 21601 flow. Second operand has 12 states, 12 states have (on average 131.5) internal successors, (1578), 12 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:11,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:11,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:11,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:13,337 INFO L130 PetriNetUnfolder]: 2643/5404 cut-off events. [2023-08-31 02:31:13,337 INFO L131 PetriNetUnfolder]: For 192680/192680 co-relation queries the response was YES. [2023-08-31 02:31:13,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54551 conditions, 5404 events. 2643/5404 cut-off events. For 192680/192680 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 43841 event pairs, 82 based on Foata normal form. 28/5430 useless extension candidates. Maximal degree in co-relation 53907. Up to 2088 conditions per place. [2023-08-31 02:31:13,388 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 628 selfloop transitions, 391 changer transitions 7/1026 dead transitions. [2023-08-31 02:31:13,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1026 transitions, 25146 flow [2023-08-31 02:31:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 02:31:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 02:31:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2541 transitions. [2023-08-31 02:31:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438481449525453 [2023-08-31 02:31:13,391 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2541 transitions. [2023-08-31 02:31:13,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2541 transitions. [2023-08-31 02:31:13,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:13,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2541 transitions. [2023-08-31 02:31:13,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 133.73684210526315) internal successors, (2541), 19 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:13,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:13,398 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:13,398 INFO L175 Difference]: Start difference. First operand has 350 places, 951 transitions, 21601 flow. Second operand 19 states and 2541 transitions. [2023-08-31 02:31:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1026 transitions, 25146 flow [2023-08-31 02:31:14,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1026 transitions, 24554 flow, removed 179 selfloop flow, removed 10 redundant places. [2023-08-31 02:31:14,987 INFO L231 Difference]: Finished difference. Result has 361 places, 953 transitions, 22277 flow [2023-08-31 02:31:14,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=20801, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=22277, PETRI_PLACES=361, PETRI_TRANSITIONS=953} [2023-08-31 02:31:14,988 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 339 predicate places. [2023-08-31 02:31:14,988 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 953 transitions, 22277 flow [2023-08-31 02:31:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.5) internal successors, (1578), 12 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:14,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:14,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:14,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:15,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:15,190 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:15,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2114038603, now seen corresponding path program 25 times [2023-08-31 02:31:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:15,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452817192] [2023-08-31 02:31:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:31:15,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:15,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452817192] [2023-08-31 02:31:15,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452817192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:15,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112677502] [2023-08-31 02:31:15,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:31:15,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:15,549 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:15,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 02:31:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 02:31:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:15,950 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-08-31 02:31:15,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 50 [2023-08-31 02:31:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:31:15,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:16,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:31:16,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 66 [2023-08-31 02:31:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:31:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112677502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:16,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 20 [2023-08-31 02:31:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246245588] [2023-08-31 02:31:16,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:31:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:16,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:31:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:31:18,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:31:21,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:31:21,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-08-31 02:31:21,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 953 transitions, 22277 flow. Second operand has 21 states, 21 states have (on average 114.19047619047619) internal successors, (2398), 21 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:21,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:21,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-08-31 02:31:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:24,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:31:26,982 INFO L130 PetriNetUnfolder]: 3175/6525 cut-off events. [2023-08-31 02:31:26,982 INFO L131 PetriNetUnfolder]: For 254286/254364 co-relation queries the response was YES. [2023-08-31 02:31:27,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69350 conditions, 6525 events. 3175/6525 cut-off events. For 254286/254364 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 55434 event pairs, 237 based on Foata normal form. 49/6548 useless extension candidates. Maximal degree in co-relation 68594. Up to 1922 conditions per place. [2023-08-31 02:31:27,048 INFO L137 encePairwiseOnDemand]: 296/305 looper letters, 558 selfloop transitions, 360 changer transitions 523/1450 dead transitions. [2023-08-31 02:31:27,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1450 transitions, 35811 flow [2023-08-31 02:31:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 02:31:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 02:31:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2935 transitions. [2023-08-31 02:31:27,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38491803278688524 [2023-08-31 02:31:27,052 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2935 transitions. [2023-08-31 02:31:27,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2935 transitions. [2023-08-31 02:31:27,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:27,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2935 transitions. [2023-08-31 02:31:27,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 117.4) internal successors, (2935), 25 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:27,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 305.0) internal successors, (7930), 26 states have internal predecessors, (7930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:27,065 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 305.0) internal successors, (7930), 26 states have internal predecessors, (7930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:27,066 INFO L175 Difference]: Start difference. First operand has 361 places, 953 transitions, 22277 flow. Second operand 25 states and 2935 transitions. [2023-08-31 02:31:27,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1450 transitions, 35811 flow [2023-08-31 02:31:29,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1450 transitions, 34322 flow, removed 543 selfloop flow, removed 10 redundant places. [2023-08-31 02:31:29,498 INFO L231 Difference]: Finished difference. Result has 380 places, 827 transitions, 19969 flow [2023-08-31 02:31:29,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=21545, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=19969, PETRI_PLACES=380, PETRI_TRANSITIONS=827} [2023-08-31 02:31:29,500 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 358 predicate places. [2023-08-31 02:31:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 827 transitions, 19969 flow [2023-08-31 02:31:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.19047619047619) internal successors, (2398), 21 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:29,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:29,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:29,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 02:31:29,701 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:29,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash -71189651, now seen corresponding path program 26 times [2023-08-31 02:31:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:29,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166678858] [2023-08-31 02:31:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:29,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:29,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166678858] [2023-08-31 02:31:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166678858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457136177] [2023-08-31 02:31:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:31:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:29,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:29,785 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:29,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 02:31:29,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:31:29,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:30,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:30,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457136177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:30,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:30,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:31:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7420636] [2023-08-31 02:31:30,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:31:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:31:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:31:30,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:30,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 827 transitions, 19969 flow. Second operand has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:30,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:30,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:32,148 INFO L130 PetriNetUnfolder]: 2514/5236 cut-off events. [2023-08-31 02:31:32,148 INFO L131 PetriNetUnfolder]: For 218565/218565 co-relation queries the response was YES. [2023-08-31 02:31:32,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56022 conditions, 5236 events. 2514/5236 cut-off events. For 218565/218565 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42952 event pairs, 792 based on Foata normal form. 24/5258 useless extension candidates. Maximal degree in co-relation 55421. Up to 4029 conditions per place. [2023-08-31 02:31:32,208 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 758 selfloop transitions, 216 changer transitions 7/981 dead transitions. [2023-08-31 02:31:32,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 981 transitions, 25425 flow [2023-08-31 02:31:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 02:31:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 02:31:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1634 transitions. [2023-08-31 02:31:32,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446448087431694 [2023-08-31 02:31:32,210 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1634 transitions. [2023-08-31 02:31:32,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1634 transitions. [2023-08-31 02:31:32,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:32,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1634 transitions. [2023-08-31 02:31:32,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 136.16666666666666) internal successors, (1634), 12 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:32,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:32,213 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:32,213 INFO L175 Difference]: Start difference. First operand has 380 places, 827 transitions, 19969 flow. Second operand 12 states and 1634 transitions. [2023-08-31 02:31:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 981 transitions, 25425 flow [2023-08-31 02:31:33,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 981 transitions, 24087 flow, removed 445 selfloop flow, removed 15 redundant places. [2023-08-31 02:31:33,941 INFO L231 Difference]: Finished difference. Result has 368 places, 902 transitions, 21615 flow [2023-08-31 02:31:33,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18842, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21615, PETRI_PLACES=368, PETRI_TRANSITIONS=902} [2023-08-31 02:31:33,942 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 346 predicate places. [2023-08-31 02:31:33,942 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 902 transitions, 21615 flow [2023-08-31 02:31:33,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:33,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:33,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:33,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 02:31:34,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 02:31:34,149 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:34,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1740084009, now seen corresponding path program 27 times [2023-08-31 02:31:34,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:34,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815160430] [2023-08-31 02:31:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:34,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:34,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815160430] [2023-08-31 02:31:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815160430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677456170] [2023-08-31 02:31:34,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:31:34,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:34,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:34,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 02:31:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:31:34,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:34,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677456170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:34,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:34,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:31:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108226377] [2023-08-31 02:31:34,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:34,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:31:34,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:31:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:31:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:34,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 902 transitions, 21615 flow. Second operand has 11 states, 11 states have (on average 131.72727272727272) internal successors, (1449), 11 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:34,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:34,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:36,945 INFO L130 PetriNetUnfolder]: 2600/5451 cut-off events. [2023-08-31 02:31:36,945 INFO L131 PetriNetUnfolder]: For 232383/232383 co-relation queries the response was YES. [2023-08-31 02:31:36,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57907 conditions, 5451 events. 2600/5451 cut-off events. For 232383/232383 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 45298 event pairs, 405 based on Foata normal form. 12/5461 useless extension candidates. Maximal degree in co-relation 57749. Up to 2295 conditions per place. [2023-08-31 02:31:37,005 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 691 selfloop transitions, 284 changer transitions 22/997 dead transitions. [2023-08-31 02:31:37,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 997 transitions, 25681 flow [2023-08-31 02:31:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:31:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:31:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1487 transitions. [2023-08-31 02:31:37,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432190760059613 [2023-08-31 02:31:37,007 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1487 transitions. [2023-08-31 02:31:37,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1487 transitions. [2023-08-31 02:31:37,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:37,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1487 transitions. [2023-08-31 02:31:37,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 135.1818181818182) internal successors, (1487), 11 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:37,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:37,011 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:37,011 INFO L175 Difference]: Start difference. First operand has 368 places, 902 transitions, 21615 flow. Second operand 11 states and 1487 transitions. [2023-08-31 02:31:37,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 997 transitions, 25681 flow [2023-08-31 02:31:38,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 997 transitions, 25264 flow, removed 173 selfloop flow, removed 4 redundant places. [2023-08-31 02:31:38,751 INFO L231 Difference]: Finished difference. Result has 379 places, 919 transitions, 22744 flow [2023-08-31 02:31:38,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=21218, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22744, PETRI_PLACES=379, PETRI_TRANSITIONS=919} [2023-08-31 02:31:38,752 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 357 predicate places. [2023-08-31 02:31:38,752 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 919 transitions, 22744 flow [2023-08-31 02:31:38,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.72727272727272) internal successors, (1449), 11 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:38,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:38,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:38,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-31 02:31:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 02:31:38,953 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:38,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 451543671, now seen corresponding path program 28 times [2023-08-31 02:31:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251592821] [2023-08-31 02:31:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:39,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:39,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251592821] [2023-08-31 02:31:39,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251592821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:39,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755893085] [2023-08-31 02:31:39,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:31:39,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:39,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:39,041 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:39,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 02:31:39,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:31:39,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:39,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755893085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:39,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:39,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 02:31:39,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047376946] [2023-08-31 02:31:39,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 02:31:39,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 02:31:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-31 02:31:39,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:39,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 919 transitions, 22744 flow. Second operand has 11 states, 11 states have (on average 131.72727272727272) internal successors, (1449), 11 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:39,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:39,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:39,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:41,625 INFO L130 PetriNetUnfolder]: 2544/5306 cut-off events. [2023-08-31 02:31:41,625 INFO L131 PetriNetUnfolder]: For 239058/239058 co-relation queries the response was YES. [2023-08-31 02:31:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58568 conditions, 5306 events. 2544/5306 cut-off events. For 239058/239058 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43903 event pairs, 192 based on Foata normal form. 22/5326 useless extension candidates. Maximal degree in co-relation 58405. Up to 3826 conditions per place. [2023-08-31 02:31:41,690 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 726 selfloop transitions, 265 changer transitions 0/991 dead transitions. [2023-08-31 02:31:41,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 991 transitions, 26131 flow [2023-08-31 02:31:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:31:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:31:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 960 transitions. [2023-08-31 02:31:41,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496487119437939 [2023-08-31 02:31:41,692 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 960 transitions. [2023-08-31 02:31:41,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 960 transitions. [2023-08-31 02:31:41,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:41,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 960 transitions. [2023-08-31 02:31:41,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.14285714285714) internal successors, (960), 7 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:41,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:41,695 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:41,695 INFO L175 Difference]: Start difference. First operand has 379 places, 919 transitions, 22744 flow. Second operand 7 states and 960 transitions. [2023-08-31 02:31:41,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 991 transitions, 26131 flow [2023-08-31 02:31:43,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 991 transitions, 25468 flow, removed 172 selfloop flow, removed 11 redundant places. [2023-08-31 02:31:43,742 INFO L231 Difference]: Finished difference. Result has 365 places, 935 transitions, 23365 flow [2023-08-31 02:31:43,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=22019, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23365, PETRI_PLACES=365, PETRI_TRANSITIONS=935} [2023-08-31 02:31:43,743 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 343 predicate places. [2023-08-31 02:31:43,743 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 935 transitions, 23365 flow [2023-08-31 02:31:43,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.72727272727272) internal successors, (1449), 11 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:43,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:43,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:43,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-31 02:31:43,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 02:31:43,944 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:43,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash -407594943, now seen corresponding path program 29 times [2023-08-31 02:31:43,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:43,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630813229] [2023-08-31 02:31:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:43,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:44,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630813229] [2023-08-31 02:31:44,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630813229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:44,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45763598] [2023-08-31 02:31:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:31:44,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:44,025 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:44,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 02:31:44,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:31:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:44,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:44,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45763598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:44,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:31:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149234379] [2023-08-31 02:31:44,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:44,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:31:44,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:31:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:31:44,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:44,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 935 transitions, 23365 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:44,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:44,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:44,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:46,564 INFO L130 PetriNetUnfolder]: 2672/5581 cut-off events. [2023-08-31 02:31:46,564 INFO L131 PetriNetUnfolder]: For 267409/267409 co-relation queries the response was YES. [2023-08-31 02:31:46,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62083 conditions, 5581 events. 2672/5581 cut-off events. For 267409/267409 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46596 event pairs, 570 based on Foata normal form. 24/5603 useless extension candidates. Maximal degree in co-relation 61922. Up to 3087 conditions per place. [2023-08-31 02:31:46,624 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 593 selfloop transitions, 461 changer transitions 2/1056 dead transitions. [2023-08-31 02:31:46,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1056 transitions, 28140 flow [2023-08-31 02:31:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:31:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:31:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1773 transitions. [2023-08-31 02:31:46,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471626733921816 [2023-08-31 02:31:46,626 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1773 transitions. [2023-08-31 02:31:46,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1773 transitions. [2023-08-31 02:31:46,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:46,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1773 transitions. [2023-08-31 02:31:46,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 136.3846153846154) internal successors, (1773), 13 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:46,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:46,630 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:46,630 INFO L175 Difference]: Start difference. First operand has 365 places, 935 transitions, 23365 flow. Second operand 13 states and 1773 transitions. [2023-08-31 02:31:46,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1056 transitions, 28140 flow [2023-08-31 02:31:48,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1056 transitions, 27823 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-31 02:31:48,646 INFO L231 Difference]: Finished difference. Result has 377 places, 965 transitions, 25521 flow [2023-08-31 02:31:48,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=23057, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=25521, PETRI_PLACES=377, PETRI_TRANSITIONS=965} [2023-08-31 02:31:48,647 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 355 predicate places. [2023-08-31 02:31:48,647 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 965 transitions, 25521 flow [2023-08-31 02:31:48,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:48,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:48,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:48,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-31 02:31:48,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:48,848 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:48,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1886138305, now seen corresponding path program 30 times [2023-08-31 02:31:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188946527] [2023-08-31 02:31:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:48,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188946527] [2023-08-31 02:31:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188946527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388183843] [2023-08-31 02:31:48,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:31:48,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:48,933 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:48,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 02:31:49,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:31:49,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388183843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:49,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 02:31:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411423126] [2023-08-31 02:31:49,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:49,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:31:49,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:31:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:31:49,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:49,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 965 transitions, 25521 flow. Second operand has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:49,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:49,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:49,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:51,848 INFO L130 PetriNetUnfolder]: 2646/5545 cut-off events. [2023-08-31 02:31:51,848 INFO L131 PetriNetUnfolder]: For 270849/270849 co-relation queries the response was YES. [2023-08-31 02:31:51,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63271 conditions, 5545 events. 2646/5545 cut-off events. For 270849/270849 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 46323 event pairs, 447 based on Foata normal form. 20/5563 useless extension candidates. Maximal degree in co-relation 63107. Up to 2560 conditions per place. [2023-08-31 02:31:51,974 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 671 selfloop transitions, 366 changer transitions 11/1048 dead transitions. [2023-08-31 02:31:51,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1048 transitions, 29091 flow [2023-08-31 02:31:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:31:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:31:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2286 transitions. [2023-08-31 02:31:51,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408871745419479 [2023-08-31 02:31:51,976 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2286 transitions. [2023-08-31 02:31:51,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2286 transitions. [2023-08-31 02:31:51,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:51,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2286 transitions. [2023-08-31 02:31:51,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.47058823529412) internal successors, (2286), 17 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:51,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:51,981 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:51,981 INFO L175 Difference]: Start difference. First operand has 377 places, 965 transitions, 25521 flow. Second operand 17 states and 2286 transitions. [2023-08-31 02:31:51,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1048 transitions, 29091 flow [2023-08-31 02:31:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1048 transitions, 28444 flow, removed 174 selfloop flow, removed 6 redundant places. [2023-08-31 02:31:54,005 INFO L231 Difference]: Finished difference. Result has 389 places, 956 transitions, 25537 flow [2023-08-31 02:31:54,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=24818, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25537, PETRI_PLACES=389, PETRI_TRANSITIONS=956} [2023-08-31 02:31:54,006 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 367 predicate places. [2023-08-31 02:31:54,006 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 956 transitions, 25537 flow [2023-08-31 02:31:54,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:54,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:54,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:54,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-31 02:31:54,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-31 02:31:54,207 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:54,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1274696957, now seen corresponding path program 31 times [2023-08-31 02:31:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:54,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732082021] [2023-08-31 02:31:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:54,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:54,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732082021] [2023-08-31 02:31:54,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732082021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:54,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096651600] [2023-08-31 02:31:54,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:31:54,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:54,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:54,289 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 02:31:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:54,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:54,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:54,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096651600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:54,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:54,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 02:31:54,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67780505] [2023-08-31 02:31:54,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:54,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:31:54,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:31:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:31:54,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:54,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 956 transitions, 25537 flow. Second operand has 12 states, 12 states have (on average 131.5) internal successors, (1578), 12 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:54,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:54,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:31:57,111 INFO L130 PetriNetUnfolder]: 2565/5400 cut-off events. [2023-08-31 02:31:57,111 INFO L131 PetriNetUnfolder]: For 264422/264422 co-relation queries the response was YES. [2023-08-31 02:31:57,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62727 conditions, 5400 events. 2565/5400 cut-off events. For 264422/264422 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 45169 event pairs, 343 based on Foata normal form. 50/5448 useless extension candidates. Maximal degree in co-relation 62562. Up to 1888 conditions per place. [2023-08-31 02:31:57,169 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 583 selfloop transitions, 462 changer transitions 7/1052 dead transitions. [2023-08-31 02:31:57,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1052 transitions, 29377 flow [2023-08-31 02:31:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:31:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:31:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2426 transitions. [2023-08-31 02:31:57,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418943533697632 [2023-08-31 02:31:57,172 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2426 transitions. [2023-08-31 02:31:57,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2426 transitions. [2023-08-31 02:31:57,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:31:57,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2426 transitions. [2023-08-31 02:31:57,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 134.77777777777777) internal successors, (2426), 18 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:57,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:57,177 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:57,177 INFO L175 Difference]: Start difference. First operand has 389 places, 956 transitions, 25537 flow. Second operand 18 states and 2426 transitions. [2023-08-31 02:31:57,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1052 transitions, 29377 flow [2023-08-31 02:31:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1052 transitions, 28722 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-08-31 02:31:59,005 INFO L231 Difference]: Finished difference. Result has 395 places, 957 transitions, 26112 flow [2023-08-31 02:31:59,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=24425, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26112, PETRI_PLACES=395, PETRI_TRANSITIONS=957} [2023-08-31 02:31:59,006 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 373 predicate places. [2023-08-31 02:31:59,006 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 957 transitions, 26112 flow [2023-08-31 02:31:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.5) internal successors, (1578), 12 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:59,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:31:59,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:31:59,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-31 02:31:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:59,209 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:31:59,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:31:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1585515753, now seen corresponding path program 32 times [2023-08-31 02:31:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:31:59,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108531547] [2023-08-31 02:31:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:31:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:31:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:31:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:59,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:31:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108531547] [2023-08-31 02:31:59,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108531547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:31:59,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986835780] [2023-08-31 02:31:59,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:31:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:31:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:31:59,289 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:31:59,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 02:31:59,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:31:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:31:59,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:31:59,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:31:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:59,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:31:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:31:59,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986835780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:31:59,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:31:59,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 02:31:59,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380223203] [2023-08-31 02:31:59,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:31:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:31:59,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:31:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:31:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:31:59,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:31:59,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 957 transitions, 26112 flow. Second operand has 15 states, 15 states have (on average 131.2) internal successors, (1968), 15 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:31:59,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:31:59,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:31:59,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:02,070 INFO L130 PetriNetUnfolder]: 2571/5396 cut-off events. [2023-08-31 02:32:02,070 INFO L131 PetriNetUnfolder]: For 277995/277995 co-relation queries the response was YES. [2023-08-31 02:32:02,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64475 conditions, 5396 events. 2571/5396 cut-off events. For 277995/277995 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 44821 event pairs, 63 based on Foata normal form. 46/5440 useless extension candidates. Maximal degree in co-relation 64311. Up to 2018 conditions per place. [2023-08-31 02:32:02,132 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 628 selfloop transitions, 417 changer transitions 20/1065 dead transitions. [2023-08-31 02:32:02,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1065 transitions, 30656 flow [2023-08-31 02:32:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 02:32:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 02:32:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2820 transitions. [2023-08-31 02:32:02,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-08-31 02:32:02,134 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2820 transitions. [2023-08-31 02:32:02,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2820 transitions. [2023-08-31 02:32:02,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:02,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2820 transitions. [2023-08-31 02:32:02,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.28571428571428) internal successors, (2820), 21 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:02,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:02,139 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:02,139 INFO L175 Difference]: Start difference. First operand has 395 places, 957 transitions, 26112 flow. Second operand 21 states and 2820 transitions. [2023-08-31 02:32:02,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1065 transitions, 30656 flow [2023-08-31 02:32:04,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1065 transitions, 30105 flow, removed 150 selfloop flow, removed 8 redundant places. [2023-08-31 02:32:04,148 INFO L231 Difference]: Finished difference. Result has 412 places, 972 transitions, 27717 flow [2023-08-31 02:32:04,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=25378, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=27717, PETRI_PLACES=412, PETRI_TRANSITIONS=972} [2023-08-31 02:32:04,149 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 390 predicate places. [2023-08-31 02:32:04,149 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 972 transitions, 27717 flow [2023-08-31 02:32:04,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.2) internal successors, (1968), 15 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:04,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-31 02:32:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:04,354 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:32:04,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1867499821, now seen corresponding path program 33 times [2023-08-31 02:32:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:04,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285558209] [2023-08-31 02:32:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:32:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285558209] [2023-08-31 02:32:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285558209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471478220] [2023-08-31 02:32:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:32:04,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:04,434 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:04,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 02:32:04,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:32:04,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:32:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:32:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:32:04,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:32:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471478220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:04,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:04,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 02:32:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354528892] [2023-08-31 02:32:04,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:04,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:32:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:32:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:32:04,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 305 [2023-08-31 02:32:04,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 972 transitions, 27717 flow. Second operand has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:04,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:04,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 305 [2023-08-31 02:32:04,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:07,426 INFO L130 PetriNetUnfolder]: 2690/5595 cut-off events. [2023-08-31 02:32:07,426 INFO L131 PetriNetUnfolder]: For 321842/321842 co-relation queries the response was YES. [2023-08-31 02:32:07,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69666 conditions, 5595 events. 2690/5595 cut-off events. For 321842/321842 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 46372 event pairs, 121 based on Foata normal form. 32/5625 useless extension candidates. Maximal degree in co-relation 69494. Up to 3499 conditions per place. [2023-08-31 02:32:07,631 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 699 selfloop transitions, 391 changer transitions 0/1090 dead transitions. [2023-08-31 02:32:07,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1090 transitions, 33072 flow [2023-08-31 02:32:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 02:32:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 02:32:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2025 transitions. [2023-08-31 02:32:07,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-08-31 02:32:07,633 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2025 transitions. [2023-08-31 02:32:07,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2025 transitions. [2023-08-31 02:32:07,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:07,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2025 transitions. [2023-08-31 02:32:07,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 135.0) internal successors, (2025), 15 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:07,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:07,637 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:07,638 INFO L175 Difference]: Start difference. First operand has 412 places, 972 transitions, 27717 flow. Second operand 15 states and 2025 transitions. [2023-08-31 02:32:07,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1090 transitions, 33072 flow [2023-08-31 02:32:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1090 transitions, 31921 flow, removed 303 selfloop flow, removed 14 redundant places. [2023-08-31 02:32:09,876 INFO L231 Difference]: Finished difference. Result has 411 places, 1022 transitions, 29612 flow [2023-08-31 02:32:09,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=26466, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=29612, PETRI_PLACES=411, PETRI_TRANSITIONS=1022} [2023-08-31 02:32:09,877 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 389 predicate places. [2023-08-31 02:32:09,877 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 1022 transitions, 29612 flow [2023-08-31 02:32:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.30769230769232) internal successors, (1707), 13 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:09,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:09,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:09,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 02:32:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-31 02:32:10,084 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:32:10,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1048144094, now seen corresponding path program 34 times [2023-08-31 02:32:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966885939] [2023-08-31 02:32:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:32:10,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:10,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966885939] [2023-08-31 02:32:10,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966885939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:10,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066176673] [2023-08-31 02:32:10,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:32:10,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:10,431 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:10,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 02:32:10,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:32:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:32:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 02:32:10,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:10,712 INFO L321 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2023-08-31 02:32:10,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 47 [2023-08-31 02:32:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:32:10,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:10,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:32:10,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2023-08-31 02:32:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:32:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066176673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:10,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-31 02:32:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213320336] [2023-08-31 02:32:10,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:10,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:32:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:32:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:32:11,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 305 [2023-08-31 02:32:11,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1022 transitions, 29612 flow. Second operand has 17 states, 17 states have (on average 116.23529411764706) internal successors, (1976), 17 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:11,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:11,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 305 [2023-08-31 02:32:11,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:14,054 INFO L130 PetriNetUnfolder]: 2635/5457 cut-off events. [2023-08-31 02:32:14,055 INFO L131 PetriNetUnfolder]: For 313725/313767 co-relation queries the response was YES. [2023-08-31 02:32:14,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69051 conditions, 5457 events. 2635/5457 cut-off events. For 313725/313767 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45203 event pairs, 171 based on Foata normal form. 51/5482 useless extension candidates. Maximal degree in co-relation 68878. Up to 2743 conditions per place. [2023-08-31 02:32:14,110 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 543 selfloop transitions, 50 changer transitions 549/1152 dead transitions. [2023-08-31 02:32:14,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1152 transitions, 34697 flow [2023-08-31 02:32:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:32:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:32:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1206 transitions. [2023-08-31 02:32:14,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954098360655738 [2023-08-31 02:32:14,112 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1206 transitions. [2023-08-31 02:32:14,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1206 transitions. [2023-08-31 02:32:14,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:14,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1206 transitions. [2023-08-31 02:32:14,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.6) internal successors, (1206), 10 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:14,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:14,114 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:14,114 INFO L175 Difference]: Start difference. First operand has 411 places, 1022 transitions, 29612 flow. Second operand 10 states and 1206 transitions. [2023-08-31 02:32:14,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1152 transitions, 34697 flow [2023-08-31 02:32:16,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1152 transitions, 34173 flow, removed 196 selfloop flow, removed 7 redundant places. [2023-08-31 02:32:16,506 INFO L231 Difference]: Finished difference. Result has 414 places, 597 transitions, 16009 flow [2023-08-31 02:32:16,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=29092, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16009, PETRI_PLACES=414, PETRI_TRANSITIONS=597} [2023-08-31 02:32:16,507 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 392 predicate places. [2023-08-31 02:32:16,507 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 597 transitions, 16009 flow [2023-08-31 02:32:16,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 116.23529411764706) internal successors, (1976), 17 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:16,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:16,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:16,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 02:32:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-31 02:32:16,708 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:32:16,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1429588667, now seen corresponding path program 35 times [2023-08-31 02:32:16,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901887437] [2023-08-31 02:32:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901887437] [2023-08-31 02:32:18,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901887437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:18,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509345265] [2023-08-31 02:32:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:32:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:18,071 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:18,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 02:32:18,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:32:18,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:32:18,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 02:32:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:20,625 INFO L321 Elim1Store]: treesize reduction 57, result has 52.9 percent of original size [2023-08-31 02:32:20,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 95 [2023-08-31 02:32:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 02:32:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:20,817 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2023-08-31 02:32:20,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2023-08-31 02:32:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 02:32:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509345265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:20,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 22 [2023-08-31 02:32:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069751849] [2023-08-31 02:32:20,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:20,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 02:32:20,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 02:32:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=462, Unknown=1, NotChecked=0, Total=552 [2023-08-31 02:32:23,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:24,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-08-31 02:32:24,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 597 transitions, 16009 flow. Second operand has 24 states, 24 states have (on average 113.91666666666667) internal successors, (2734), 24 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:24,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:24,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-08-31 02:32:24,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:32:26,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:28,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:32,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:34,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:36,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:38,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:40,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:43,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:45,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:47,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:49,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:51,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 02:32:53,333 INFO L130 PetriNetUnfolder]: 2481/4958 cut-off events. [2023-08-31 02:32:53,333 INFO L131 PetriNetUnfolder]: For 278783/278808 co-relation queries the response was YES. [2023-08-31 02:32:53,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59461 conditions, 4958 events. 2481/4958 cut-off events. For 278783/278808 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38512 event pairs, 187 based on Foata normal form. 15/4959 useless extension candidates. Maximal degree in co-relation 59285. Up to 2785 conditions per place. [2023-08-31 02:32:53,392 INFO L137 encePairwiseOnDemand]: 296/305 looper letters, 634 selfloop transitions, 379 changer transitions 11/1034 dead transitions. [2023-08-31 02:32:53,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1034 transitions, 28972 flow [2023-08-31 02:32:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 02:32:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 02:32:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2364 transitions. [2023-08-31 02:32:53,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38754098360655737 [2023-08-31 02:32:53,395 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2364 transitions. [2023-08-31 02:32:53,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2364 transitions. [2023-08-31 02:32:53,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:32:53,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2364 transitions. [2023-08-31 02:32:53,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 118.2) internal successors, (2364), 20 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:53,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:53,401 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:53,401 INFO L175 Difference]: Start difference. First operand has 414 places, 597 transitions, 16009 flow. Second operand 20 states and 2364 transitions. [2023-08-31 02:32:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1034 transitions, 28972 flow [2023-08-31 02:32:55,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1034 transitions, 27279 flow, removed 605 selfloop flow, removed 17 redundant places. [2023-08-31 02:32:55,342 INFO L231 Difference]: Finished difference. Result has 407 places, 883 transitions, 23506 flow [2023-08-31 02:32:55,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=14762, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23506, PETRI_PLACES=407, PETRI_TRANSITIONS=883} [2023-08-31 02:32:55,343 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 385 predicate places. [2023-08-31 02:32:55,343 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 883 transitions, 23506 flow [2023-08-31 02:32:55,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 113.91666666666667) internal successors, (2734), 24 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:55,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:32:55,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:32:55,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 02:32:55,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-31 02:32:55,550 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:32:55,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:32:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash -616840415, now seen corresponding path program 36 times [2023-08-31 02:32:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:32:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915065322] [2023-08-31 02:32:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:32:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:32:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:32:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:32:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:32:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915065322] [2023-08-31 02:32:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915065322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:32:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431669004] [2023-08-31 02:32:56,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:32:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:32:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:32:56,899 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:32:56,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 02:32:57,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:32:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:32:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-31 02:32:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:32:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:32:57,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:32:57,634 INFO L321 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2023-08-31 02:32:57,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 103 [2023-08-31 02:32:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:32:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431669004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:32:57,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:32:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-08-31 02:32:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280873796] [2023-08-31 02:32:57,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:32:57,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:32:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:32:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:32:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:32:59,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 305 [2023-08-31 02:32:59,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 883 transitions, 23506 flow. Second operand has 30 states, 30 states have (on average 108.73333333333333) internal successors, (3262), 30 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:32:59,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:32:59,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 305 [2023-08-31 02:32:59,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:33:07,264 INFO L130 PetriNetUnfolder]: 7362/14725 cut-off events. [2023-08-31 02:33:07,264 INFO L131 PetriNetUnfolder]: For 816588/816632 co-relation queries the response was YES. [2023-08-31 02:33:07,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174947 conditions, 14725 events. 7362/14725 cut-off events. For 816588/816632 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 137842 event pairs, 431 based on Foata normal form. 79/14775 useless extension candidates. Maximal degree in co-relation 173157. Up to 4922 conditions per place. [2023-08-31 02:33:07,590 INFO L137 encePairwiseOnDemand]: 296/305 looper letters, 1058 selfloop transitions, 1576 changer transitions 48/2692 dead transitions. [2023-08-31 02:33:07,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2692 transitions, 77118 flow [2023-08-31 02:33:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 02:33:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 02:33:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3412 transitions. [2023-08-31 02:33:07,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372896174863388 [2023-08-31 02:33:07,593 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3412 transitions. [2023-08-31 02:33:07,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3412 transitions. [2023-08-31 02:33:07,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:33:07,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3412 transitions. [2023-08-31 02:33:07,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:07,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 305.0) internal successors, (9455), 31 states have internal predecessors, (9455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:07,599 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 305.0) internal successors, (9455), 31 states have internal predecessors, (9455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:07,599 INFO L175 Difference]: Start difference. First operand has 407 places, 883 transitions, 23506 flow. Second operand 30 states and 3412 transitions. [2023-08-31 02:33:07,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2692 transitions, 77118 flow [2023-08-31 02:33:18,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 2692 transitions, 74314 flow, removed 1359 selfloop flow, removed 8 redundant places. [2023-08-31 02:33:18,324 INFO L231 Difference]: Finished difference. Result has 444 places, 2284 transitions, 66895 flow [2023-08-31 02:33:18,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=22294, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=66895, PETRI_PLACES=444, PETRI_TRANSITIONS=2284} [2023-08-31 02:33:18,326 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 422 predicate places. [2023-08-31 02:33:18,326 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 2284 transitions, 66895 flow [2023-08-31 02:33:18,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 108.73333333333333) internal successors, (3262), 30 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:33:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:33:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:33:18,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 02:33:18,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-31 02:33:18,532 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:33:18,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:33:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 670070567, now seen corresponding path program 37 times [2023-08-31 02:33:18,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:33:18,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665637913] [2023-08-31 02:33:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:33:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:33:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:33:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:33:19,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:33:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665637913] [2023-08-31 02:33:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665637913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:33:19,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704984619] [2023-08-31 02:33:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:33:19,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:33:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:33:19,968 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:33:19,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 02:33:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:33:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-31 02:33:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:33:20,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 02:33:20,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:33:20,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 02:33:20,758 INFO L321 Elim1Store]: treesize reduction 112, result has 26.8 percent of original size [2023-08-31 02:33:20,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 198 treesize of output 88 [2023-08-31 02:33:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:33:20,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:33:21,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:33:21,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 392 [2023-08-31 02:33:23,742 INFO L321 Elim1Store]: treesize reduction 11, result has 98.9 percent of original size [2023-08-31 02:33:23,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 7352 treesize of output 6591 [2023-08-31 02:33:25,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:33:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 3051 treesize of output 2635 [2023-08-31 02:33:27,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:33:27,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 2350 treesize of output 2300 Killed by 15