./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.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/fibonacci.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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --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 01:38:21,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:38:21,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:38:21,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:38:21,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:38:21,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:38:21,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:38:21,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:38:21,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:38:21,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:38:21,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:38:21,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:38:21,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:38:21,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:38:21,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:38:21,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:38:21,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:38:21,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:38:21,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:38:21,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:38:21,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:38:21,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:38:21,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:38:21,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:38:21,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:38:21,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:38:21,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:38:21,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:38:21,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:38:21,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:38:21,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:38:21,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:38:21,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:38:21,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:38:21,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:38:21,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:38:21,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:38:21,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:38:21,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:38:21,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:38:21,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:38:21,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:38:21,795 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:38:21,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:38:21,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:38:21,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:38:21,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:38:21,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:38:21,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:38:21,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:38:21,797 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:38:21,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:38:21,798 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:38:21,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:38:21,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:38:21,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:38:21,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:38:21,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:38:21,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:38:21,800 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:38:21,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:38:21,800 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:38:21,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:38:21,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:38:21,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:38:21,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:38:21,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:38:21,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:38:21,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:38:21,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:38:21,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:38:21,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:38:21,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:38:21,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:38:21,803 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:38:21,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:38:21,803 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:38:21,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:38:22,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:38:22,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:38:22,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:38:22,134 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:38:22,135 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:38:22,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-31 01:38:23,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:38:23,387 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:38:23,388 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-31 01:38:23,393 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c267faf/d28ac16685544cbda5571324bbcdf586/FLAG02026f1fb [2023-08-31 01:38:23,405 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c267faf/d28ac16685544cbda5571324bbcdf586 [2023-08-31 01:38:23,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:38:23,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:38:23,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:38:23,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:38:23,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:38:23,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a6671b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23, skipping insertion in model container [2023-08-31 01:38:23,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:38:23,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:38:23,605 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/fibonacci.wvr.c[2330,2343] [2023-08-31 01:38:23,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:38:23,627 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:38:23,661 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/fibonacci.wvr.c[2330,2343] [2023-08-31 01:38:23,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:38:23,681 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:38:23,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23 WrapperNode [2023-08-31 01:38:23,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:38:23,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:38:23,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:38:23,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:38:23,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,737 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-08-31 01:38:23,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:38:23,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:38:23,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:38:23,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:38:23,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,782 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:38:23,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:38:23,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:38:23,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:38:23,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (1/1) ... [2023-08-31 01:38:23,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:38:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:23,820 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 01:38:23,842 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 01:38:23,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:38:23,858 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:38:23,858 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:38:23,858 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:38:23,858 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:38:23,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:38:23,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:38:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:38:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:38:23,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:38:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:38:23,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:38:23,864 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 01:38:23,978 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:38:23,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:38:24,302 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:38:24,314 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:38:24,317 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 01:38:24,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:38:24 BoogieIcfgContainer [2023-08-31 01:38:24,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:38:24,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:38:24,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:38:24,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:38:24,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:38:23" (1/3) ... [2023-08-31 01:38:24,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0f1890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:38:24, skipping insertion in model container [2023-08-31 01:38:24,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:38:23" (2/3) ... [2023-08-31 01:38:24,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0f1890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:38:24, skipping insertion in model container [2023-08-31 01:38:24,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:38:24" (3/3) ... [2023-08-31 01:38:24,329 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-08-31 01:38:24,334 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:38:24,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:38:24,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:38:24,342 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:38:24,438 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 01:38:24,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 196 transitions, 408 flow [2023-08-31 01:38:24,606 INFO L130 PetriNetUnfolder]: 14/194 cut-off events. [2023-08-31 01:38:24,608 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:38:24,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 14/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-31 01:38:24,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 196 transitions, 408 flow [2023-08-31 01:38:24,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 186 transitions, 384 flow [2023-08-31 01:38:24,626 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:38:24,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 186 transitions, 384 flow [2023-08-31 01:38:24,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 186 transitions, 384 flow [2023-08-31 01:38:24,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 186 transitions, 384 flow [2023-08-31 01:38:24,699 INFO L130 PetriNetUnfolder]: 14/186 cut-off events. [2023-08-31 01:38:24,700 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:38:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 14/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-08-31 01:38:24,708 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2023-08-31 01:38:29,973 INFO L134 LiptonReduction]: Checked pairs total: 6342 [2023-08-31 01:38:29,974 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-31 01:38:29,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:38:29,990 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;@3e8cd6fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:38:29,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 01:38:29,994 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 01:38:29,994 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:38:29,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:29,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:29,995 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 01:38:29,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2015475980, now seen corresponding path program 1 times [2023-08-31 01:38:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:30,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494186191] [2023-08-31 01:38:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:30,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:30,581 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 01:38:30,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:30,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494186191] [2023-08-31 01:38:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494186191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:38:30,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:38:30,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:38:30,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374816590] [2023-08-31 01:38:30,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:38:30,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:38:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:38:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:38:30,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-08-31 01:38:30,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 01:38:30,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:30,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-08-31 01:38:30,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:30,821 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2023-08-31 01:38:30,822 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-31 01:38:30,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 334 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-08-31 01:38:30,824 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-08-31 01:38:30,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-08-31 01:38:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-08-31 01:38:30,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42184466019417477 [2023-08-31 01:38:30,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-08-31 01:38:30,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-08-31 01:38:30,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:30,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-08-31 01:38:30,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 01:38:30,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:30,861 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:30,863 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 869 transitions. [2023-08-31 01:38:30,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-08-31 01:38:30,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:38:30,868 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-08-31 01:38:30,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-31 01:38:30,872 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-31 01:38:30,872 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-08-31 01:38:30,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 01:38:30,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:30,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:30,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:38:30,874 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 01:38:30,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1883585228, now seen corresponding path program 2 times [2023-08-31 01:38:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:30,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824165821] [2023-08-31 01:38:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:30,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:31,051 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 01:38:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824165821] [2023-08-31 01:38:31,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824165821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:38:31,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:38:31,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:38:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090412286] [2023-08-31 01:38:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:38:31,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:38:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:31,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:38:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:38:31,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-08-31 01:38:31,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 01:38:31,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:31,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-08-31 01:38:31,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:31,179 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2023-08-31 01:38:31,179 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 01:38:31,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 1 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-08-31 01:38:31,181 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-08-31 01:38:31,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-08-31 01:38:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-08-31 01:38:31,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420873786407767 [2023-08-31 01:38:31,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-08-31 01:38:31,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-08-31 01:38:31,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:31,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-08-31 01:38:31,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states 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 01:38:31,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,192 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 867 transitions. [2023-08-31 01:38:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-08-31 01:38:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 01:38:31,194 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-08-31 01:38:31,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-31 01:38:31,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-31 01:38:31,195 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-08-31 01:38:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states 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 01:38:31,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:31,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:38:31,196 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 01:38:31,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1189875957, now seen corresponding path program 1 times [2023-08-31 01:38:31,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:31,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759837865] [2023-08-31 01:38:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:31,271 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 01:38:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759837865] [2023-08-31 01:38:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759837865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:38:31,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:38:31,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:38:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024170090] [2023-08-31 01:38:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:38:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:38:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:38:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:38:31,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 412 [2023-08-31 01:38:31,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 01:38:31,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:31,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 412 [2023-08-31 01:38:31,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:31,379 INFO L130 PetriNetUnfolder]: 84/157 cut-off events. [2023-08-31 01:38:31,380 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 01:38:31,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 157 events. 84/157 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 477 event pairs, 28 based on Foata normal form. 4/147 useless extension candidates. Maximal degree in co-relation 476. Up to 84 conditions per place. [2023-08-31 01:38:31,381 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 32 selfloop transitions, 6 changer transitions 6/44 dead transitions. [2023-08-31 01:38:31,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 267 flow [2023-08-31 01:38:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 892 transitions. [2023-08-31 01:38:31,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330097087378641 [2023-08-31 01:38:31,384 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 892 transitions. [2023-08-31 01:38:31,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 892 transitions. [2023-08-31 01:38:31,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:31,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 892 transitions. [2023-08-31 01:38:31,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 01:38:31,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,392 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 892 transitions. [2023-08-31 01:38:31,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 267 flow [2023-08-31 01:38:31,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 253 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:31,394 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 127 flow [2023-08-31 01:38:31,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-31 01:38:31,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-31 01:38:31,395 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 127 flow [2023-08-31 01:38:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 01:38:31,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:31,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:31,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:38:31,397 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 01:38:31,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:31,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972385, now seen corresponding path program 2 times [2023-08-31 01:38:31,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:31,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93382311] [2023-08-31 01:38:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:31,448 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 01:38:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93382311] [2023-08-31 01:38:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93382311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:38:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:38:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:38:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627626071] [2023-08-31 01:38:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:38:31,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:38:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:38:31,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:38:31,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-08-31 01:38:31,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:31,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:31,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-08-31 01:38:31,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:31,547 INFO L130 PetriNetUnfolder]: 102/193 cut-off events. [2023-08-31 01:38:31,547 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-08-31 01:38:31,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 193 events. 102/193 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 588 event pairs, 38 based on Foata normal form. 6/179 useless extension candidates. Maximal degree in co-relation 646. Up to 128 conditions per place. [2023-08-31 01:38:31,549 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 33 selfloop transitions, 9 changer transitions 7/49 dead transitions. [2023-08-31 01:38:31,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 354 flow [2023-08-31 01:38:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:38:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:38:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-08-31 01:38:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292071197411003 [2023-08-31 01:38:31,554 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-08-31 01:38:31,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-08-31 01:38:31,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:31,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-08-31 01:38:31,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states 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 01:38:31,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 01:38:31,562 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 01:38:31,562 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 127 flow. Second operand 6 states and 1061 transitions. [2023-08-31 01:38:31,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 354 flow [2023-08-31 01:38:31,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 334 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:31,565 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 186 flow [2023-08-31 01:38:31,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-31 01:38:31,566 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-31 01:38:31,566 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 186 flow [2023-08-31 01:38:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:31,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:31,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:31,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 01:38:31,567 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 01:38:31,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash 993485807, now seen corresponding path program 1 times [2023-08-31 01:38:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:31,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777894078] [2023-08-31 01:38:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:31,626 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 01:38:31,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777894078] [2023-08-31 01:38:31,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777894078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:31,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764667707] [2023-08-31 01:38:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:31,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:31,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:31,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:38:31,657 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 01:38:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:31,819 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 01:38:31,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:31,847 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 01:38:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764667707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:31,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:31,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 01:38:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993473294] [2023-08-31 01:38:31,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:31,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:38:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:38:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:38:31,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:31,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 01:38:31,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:31,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:31,982 INFO L130 PetriNetUnfolder]: 106/197 cut-off events. [2023-08-31 01:38:31,983 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-08-31 01:38:31,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 197 events. 106/197 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 622 event pairs, 20 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 770. Up to 96 conditions per place. [2023-08-31 01:38:31,984 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-08-31 01:38:31,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 400 flow [2023-08-31 01:38:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-08-31 01:38:31,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-08-31 01:38:31,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-08-31 01:38:31,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-08-31 01:38:31,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:31,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-08-31 01:38:31,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 01:38:31,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:31,994 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 186 flow. Second operand 5 states and 885 transitions. [2023-08-31 01:38:31,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 400 flow [2023-08-31 01:38:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 377 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:31,997 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 211 flow [2023-08-31 01:38:31,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-31 01:38:31,998 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-08-31 01:38:31,998 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 211 flow [2023-08-31 01:38:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 01:38:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:32,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 01:38:32,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:32,205 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 01:38:32,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513565, now seen corresponding path program 2 times [2023-08-31 01:38:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:32,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337704038] [2023-08-31 01:38:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:32,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:32,257 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 01:38:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:32,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337704038] [2023-08-31 01:38:32,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337704038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:32,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472486909] [2023-08-31 01:38:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:38:32,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:32,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:32,260 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 01:38:32,263 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 01:38:32,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:32,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:32,392 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 01:38:32,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:32,416 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 01:38:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472486909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:32,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408158134] [2023-08-31 01:38:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:38:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:38:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:38:32,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:32,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 211 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:32,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:32,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:32,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:32,644 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-08-31 01:38:32,644 INFO L131 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2023-08-31 01:38:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 235 events. 124/235 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 806 event pairs, 16 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 773. Up to 104 conditions per place. [2023-08-31 01:38:32,646 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-08-31 01:38:32,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 537 flow [2023-08-31 01:38:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:38:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:38:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1413 transitions. [2023-08-31 01:38:32,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42870145631067963 [2023-08-31 01:38:32,652 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1413 transitions. [2023-08-31 01:38:32,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1413 transitions. [2023-08-31 01:38:32,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:32,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1413 transitions. [2023-08-31 01:38:32,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.625) internal successors, (1413), 8 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states 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 01:38:32,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:38:32,660 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:38:32,660 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 211 flow. Second operand 8 states and 1413 transitions. [2023-08-31 01:38:32,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 537 flow [2023-08-31 01:38:32,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:32,665 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 302 flow [2023-08-31 01:38:32,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-31 01:38:32,669 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-31 01:38:32,669 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 302 flow [2023-08-31 01:38:32,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:32,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:32,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:32,685 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 01:38:32,876 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 01:38:32,876 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 01:38:32,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash 113238829, now seen corresponding path program 3 times [2023-08-31 01:38:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:32,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962120313] [2023-08-31 01:38:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:32,923 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 01:38:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962120313] [2023-08-31 01:38:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962120313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:32,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576615728] [2023-08-31 01:38:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:38:32,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:32,925 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 01:38:32,950 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 01:38:33,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:38:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:33,034 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 01:38:33,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:33,053 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 01:38:33,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576615728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:33,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:33,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 01:38:33,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249438177] [2023-08-31 01:38:33,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 01:38:33,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 01:38:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-31 01:38:33,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:33,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 01:38:33,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:33,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:33,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:33,217 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-08-31 01:38:33,217 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-08-31 01:38:33,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 245 events. 130/245 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 847 event pairs, 16 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 855. Up to 104 conditions per place. [2023-08-31 01:38:33,219 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-08-31 01:38:33,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 505 flow [2023-08-31 01:38:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2023-08-31 01:38:33,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766990291262136 [2023-08-31 01:38:33,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2023-08-31 01:38:33,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2023-08-31 01:38:33,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:33,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2023-08-31 01:38:33,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states 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 01:38:33,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:33,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:33,228 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 302 flow. Second operand 5 states and 881 transitions. [2023-08-31 01:38:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 505 flow [2023-08-31 01:38:33,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 01:38:33,233 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 343 flow [2023-08-31 01:38:33,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-08-31 01:38:33,234 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-31 01:38:33,234 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 343 flow [2023-08-31 01:38:33,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 01:38:33,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:33,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:33,242 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 01:38:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:33,441 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 01:38:33,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1270574027, now seen corresponding path program 3 times [2023-08-31 01:38:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:33,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137275857] [2023-08-31 01:38:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:33,516 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 01:38:33,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137275857] [2023-08-31 01:38:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137275857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:38:33,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:38:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 01:38:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201348271] [2023-08-31 01:38:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:38:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:38:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:38:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:38:33,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-08-31 01:38:33,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:33,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:33,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-08-31 01:38:33,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:33,630 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-08-31 01:38:33,631 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2023-08-31 01:38:33,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 229 events. 122/229 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 40 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 921. Up to 160 conditions per place. [2023-08-31 01:38:33,633 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-08-31 01:38:33,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 512 flow [2023-08-31 01:38:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:38:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:38:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1062 transitions. [2023-08-31 01:38:33,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-08-31 01:38:33,636 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1062 transitions. [2023-08-31 01:38:33,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1062 transitions. [2023-08-31 01:38:33,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:33,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1062 transitions. [2023-08-31 01:38:33,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 01:38:33,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 01:38:33,644 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 01:38:33,644 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 343 flow. Second operand 6 states and 1062 transitions. [2023-08-31 01:38:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 512 flow [2023-08-31 01:38:33,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 495 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:33,650 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 296 flow [2023-08-31 01:38:33,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2023-08-31 01:38:33,652 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-31 01:38:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 296 flow [2023-08-31 01:38:33,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:33,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:33,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 01:38:33,653 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 01:38:33,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash -691740739, now seen corresponding path program 4 times [2023-08-31 01:38:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:33,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163850200] [2023-08-31 01:38:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:33,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:33,716 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 01:38:33,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163850200] [2023-08-31 01:38:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163850200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883117019] [2023-08-31 01:38:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:33,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:33,718 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 01:38:33,744 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 01:38:33,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:33,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:33,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:33,844 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 01:38:33,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:33,864 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 01:38:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883117019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:33,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:33,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853122191] [2023-08-31 01:38:33,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:38:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:38:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:38:33,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:33,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:33,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:33,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:34,016 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-08-31 01:38:34,017 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-08-31 01:38:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 219 events. 122/219 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 669 event pairs, 43 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 985. Up to 161 conditions per place. [2023-08-31 01:38:34,019 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-08-31 01:38:34,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 449 flow [2023-08-31 01:38:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2023-08-31 01:38:34,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-08-31 01:38:34,022 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2023-08-31 01:38:34,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2023-08-31 01:38:34,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:34,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2023-08-31 01:38:34,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states 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 01:38:34,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:34,027 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:34,027 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 296 flow. Second operand 5 states and 880 transitions. [2023-08-31 01:38:34,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 449 flow [2023-08-31 01:38:34,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 400 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-31 01:38:34,031 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 285 flow [2023-08-31 01:38:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-31 01:38:34,032 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-08-31 01:38:34,032 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 285 flow [2023-08-31 01:38:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:34,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:34,043 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 01:38:34,243 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 01:38:34,243 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 01:38:34,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -935224503, now seen corresponding path program 4 times [2023-08-31 01:38:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481703227] [2023-08-31 01:38:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:34,290 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 01:38:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:34,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481703227] [2023-08-31 01:38:34,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481703227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:34,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341853154] [2023-08-31 01:38:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:34,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:34,292 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 01:38:34,308 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 01:38:34,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:34,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:34,401 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 01:38:34,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:34,427 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 01:38:34,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341853154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:34,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:34,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:34,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075387995] [2023-08-31 01:38:34,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:34,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:38:34,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:38:34,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:38:34,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:34,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:34,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:34,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:34,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:34,605 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-08-31 01:38:34,605 INFO L131 PetriNetUnfolder]: For 575/575 co-relation queries the response was YES. [2023-08-31 01:38:34,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 203 events. 114/203 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 589 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 900. Up to 153 conditions per place. [2023-08-31 01:38:34,607 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-08-31 01:38:34,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 408 flow [2023-08-31 01:38:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:38:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:38:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 877 transitions. [2023-08-31 01:38:34,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572815533980585 [2023-08-31 01:38:34,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 877 transitions. [2023-08-31 01:38:34,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 877 transitions. [2023-08-31 01:38:34,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:34,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 877 transitions. [2023-08-31 01:38:34,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.4) internal successors, (877), 5 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 01:38:34,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:34,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 01:38:34,615 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 285 flow. Second operand 5 states and 877 transitions. [2023-08-31 01:38:34,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 408 flow [2023-08-31 01:38:34,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:34,618 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 282 flow [2023-08-31 01:38:34,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-08-31 01:38:34,619 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-31 01:38:34,619 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 282 flow [2023-08-31 01:38:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states 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 01:38:34,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:34,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:34,633 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 01:38:34,831 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 01:38:34,831 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 01:38:34,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 899158593, now seen corresponding path program 5 times [2023-08-31 01:38:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912847308] [2023-08-31 01:38:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:34,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:34,881 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 01:38:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912847308] [2023-08-31 01:38:34,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912847308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902456325] [2023-08-31 01:38:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:38:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:34,883 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 01:38:34,913 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 01:38:34,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:34,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 01:38:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:34,995 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 01:38:34,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:35,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902456325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:35,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:35,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002109639] [2023-08-31 01:38:35,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:35,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:38:35,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:35,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:38:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:38:35,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:35,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states 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 01:38:35,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:35,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:35,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:35,164 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-08-31 01:38:35,165 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2023-08-31 01:38:35,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 193 events. 110/193 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 569 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 878. Up to 86 conditions per place. [2023-08-31 01:38:35,166 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-08-31 01:38:35,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 474 flow [2023-08-31 01:38:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:38:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:38:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1396 transitions. [2023-08-31 01:38:35,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-08-31 01:38:35,170 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1396 transitions. [2023-08-31 01:38:35,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1396 transitions. [2023-08-31 01:38:35,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:35,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1396 transitions. [2023-08-31 01:38:35,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.5) internal successors, (1396), 8 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 01:38:35,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:38:35,178 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:38:35,178 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 282 flow. Second operand 8 states and 1396 transitions. [2023-08-31 01:38:35,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 474 flow [2023-08-31 01:38:35,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 426 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-31 01:38:35,181 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 277 flow [2023-08-31 01:38:35,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-31 01:38:35,182 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-08-31 01:38:35,182 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 277 flow [2023-08-31 01:38:35,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states 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 01:38:35,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:35,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:35,191 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 01:38:35,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:35,389 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 01:38:35,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash -538177452, now seen corresponding path program 1 times [2023-08-31 01:38:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:35,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488041048] [2023-08-31 01:38:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488041048] [2023-08-31 01:38:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488041048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192763586] [2023-08-31 01:38:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:35,674 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 01:38:35,692 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 01:38:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:35,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192763586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:36,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:36,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:36,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129347538] [2023-08-31 01:38:36,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:36,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:36,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:36,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:36,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 01:38:36,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:36,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:36,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:36,403 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-08-31 01:38:36,403 INFO L131 PetriNetUnfolder]: For 578/598 co-relation queries the response was YES. [2023-08-31 01:38:36,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 238 events. 132/238 cut-off events. For 578/598 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 814 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1030. Up to 167 conditions per place. [2023-08-31 01:38:36,406 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-08-31 01:38:36,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 519 flow [2023-08-31 01:38:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1167 transitions. [2023-08-31 01:38:36,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40464632454923716 [2023-08-31 01:38:36,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1167 transitions. [2023-08-31 01:38:36,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1167 transitions. [2023-08-31 01:38:36,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:36,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1167 transitions. [2023-08-31 01:38:36,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states 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 01:38:36,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:36,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:36,416 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 277 flow. Second operand 7 states and 1167 transitions. [2023-08-31 01:38:36,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 519 flow [2023-08-31 01:38:36,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-31 01:38:36,419 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 370 flow [2023-08-31 01:38:36,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-31 01:38:36,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-08-31 01:38:36,420 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 370 flow [2023-08-31 01:38:36,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 01:38:36,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:36,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:36,435 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 01:38:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:36,636 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 01:38:36,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1242983908, now seen corresponding path program 2 times [2023-08-31 01:38:36,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417175929] [2023-08-31 01:38:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417175929] [2023-08-31 01:38:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417175929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228458499] [2023-08-31 01:38:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:38:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:36,961 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 01:38:36,964 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 01:38:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:37,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228458499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:37,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:37,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 01:38:37,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062732890] [2023-08-31 01:38:37,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:38:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:38:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:38:37,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:37,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 370 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:37,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:37,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:37,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:37,629 INFO L130 PetriNetUnfolder]: 144/264 cut-off events. [2023-08-31 01:38:37,629 INFO L131 PetriNetUnfolder]: For 828/858 co-relation queries the response was YES. [2023-08-31 01:38:37,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 264 events. 144/264 cut-off events. For 828/858 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1222. Up to 171 conditions per place. [2023-08-31 01:38:37,631 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-08-31 01:38:37,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 604 flow [2023-08-31 01:38:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2023-08-31 01:38:37,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406380027739251 [2023-08-31 01:38:37,635 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2023-08-31 01:38:37,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2023-08-31 01:38:37,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:37,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2023-08-31 01:38:37,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:37,641 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:37,641 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 370 flow. Second operand 7 states and 1172 transitions. [2023-08-31 01:38:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 604 flow [2023-08-31 01:38:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 571 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:37,645 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 439 flow [2023-08-31 01:38:37,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-31 01:38:37,646 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-08-31 01:38:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 439 flow [2023-08-31 01:38:37,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:37,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:37,653 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 01:38:37,853 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,SelfDestructingSolverStorable12 [2023-08-31 01:38:37,853 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 01:38:37,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278278, now seen corresponding path program 3 times [2023-08-31 01:38:37,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:37,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186771172] [2023-08-31 01:38:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186771172] [2023-08-31 01:38:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186771172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022143159] [2023-08-31 01:38:38,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:38:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:38,072 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 01:38:38,097 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 01:38:38,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:38:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:38,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022143159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:38,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:38,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:38:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510910866] [2023-08-31 01:38:38,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:38,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:38,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 01:38:38,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:38,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:38,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:38,728 INFO L130 PetriNetUnfolder]: 141/255 cut-off events. [2023-08-31 01:38:38,728 INFO L131 PetriNetUnfolder]: For 1187/1213 co-relation queries the response was YES. [2023-08-31 01:38:38,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 255 events. 141/255 cut-off events. For 1187/1213 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 900 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1269. Up to 171 conditions per place. [2023-08-31 01:38:38,731 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-08-31 01:38:38,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 636 flow [2023-08-31 01:38:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1168 transitions. [2023-08-31 01:38:38,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40499306518723993 [2023-08-31 01:38:38,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1168 transitions. [2023-08-31 01:38:38,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1168 transitions. [2023-08-31 01:38:38,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:38,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1168 transitions. [2023-08-31 01:38:38,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 01:38:38,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:38,741 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:38,741 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 439 flow. Second operand 7 states and 1168 transitions. [2023-08-31 01:38:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 636 flow [2023-08-31 01:38:38,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 578 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-31 01:38:38,745 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 471 flow [2023-08-31 01:38:38,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-31 01:38:38,746 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-08-31 01:38:38,746 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 471 flow [2023-08-31 01:38:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 01:38:38,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:38,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:38,752 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 01:38:38,952 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,SelfDestructingSolverStorable13 [2023-08-31 01:38:38,952 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 01:38:38,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1742862228, now seen corresponding path program 4 times [2023-08-31 01:38:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:38,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535430123] [2023-08-31 01:38:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:39,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535430123] [2023-08-31 01:38:39,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535430123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303829418] [2023-08-31 01:38:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:39,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:39,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:39,313 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 01:38:39,341 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 01:38:39,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:39,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:39,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:39,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303829418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:39,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:39,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 01:38:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834620101] [2023-08-31 01:38:39,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:38:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:38:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:38:39,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:39,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 471 flow. Second operand has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 01:38:39,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:39,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:39,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:39,985 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-08-31 01:38:39,985 INFO L131 PetriNetUnfolder]: For 1428/1454 co-relation queries the response was YES. [2023-08-31 01:38:39,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 298 events. 166/298 cut-off events. For 1428/1454 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1112 event pairs, 10 based on Foata normal form. 9/300 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-08-31 01:38:39,988 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-08-31 01:38:39,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 723 flow [2023-08-31 01:38:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1159 transitions. [2023-08-31 01:38:39,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40187239944521497 [2023-08-31 01:38:39,991 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1159 transitions. [2023-08-31 01:38:39,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1159 transitions. [2023-08-31 01:38:39,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:39,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1159 transitions. [2023-08-31 01:38:39,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states 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 01:38:39,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:39,998 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:39,998 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 471 flow. Second operand 7 states and 1159 transitions. [2023-08-31 01:38:39,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 723 flow [2023-08-31 01:38:40,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 674 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-31 01:38:40,003 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 574 flow [2023-08-31 01:38:40,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-08-31 01:38:40,004 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-08-31 01:38:40,004 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 574 flow [2023-08-31 01:38:40,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 01:38:40,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:40,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:40,010 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 01:38:40,210 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,SelfDestructingSolverStorable14 [2023-08-31 01:38:40,210 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 01:38:40,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -433241830, now seen corresponding path program 5 times [2023-08-31 01:38:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410026550] [2023-08-31 01:38:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410026550] [2023-08-31 01:38:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410026550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523186808] [2023-08-31 01:38:40,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:38:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:40,487 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 01:38:40,507 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 01:38:40,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:38:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:40,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:40,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523186808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:40,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:40,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 01:38:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461218814] [2023-08-31 01:38:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:40,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:38:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:38:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:38:40,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:40,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 574 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:40,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:40,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:40,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:41,150 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-08-31 01:38:41,151 INFO L131 PetriNetUnfolder]: For 1850/1876 co-relation queries the response was YES. [2023-08-31 01:38:41,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 326 events. 180/326 cut-off events. For 1850/1876 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1257 event pairs, 14 based on Foata normal form. 9/328 useless extension candidates. Maximal degree in co-relation 1754. Up to 248 conditions per place. [2023-08-31 01:38:41,154 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-08-31 01:38:41,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 837 flow [2023-08-31 01:38:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1166 transitions. [2023-08-31 01:38:41,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042995839112344 [2023-08-31 01:38:41,158 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1166 transitions. [2023-08-31 01:38:41,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1166 transitions. [2023-08-31 01:38:41,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:41,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1166 transitions. [2023-08-31 01:38:41,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 01:38:41,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:41,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:41,164 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 574 flow. Second operand 7 states and 1166 transitions. [2023-08-31 01:38:41,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 837 flow [2023-08-31 01:38:41,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 796 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:41,171 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 651 flow [2023-08-31 01:38:41,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-31 01:38:41,171 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-08-31 01:38:41,171 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 651 flow [2023-08-31 01:38:41,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:41,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:41,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:41,179 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 01:38:41,379 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,SelfDestructingSolverStorable15 [2023-08-31 01:38:41,379 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 01:38:41,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -405536200, now seen corresponding path program 6 times [2023-08-31 01:38:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:41,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512626091] [2023-08-31 01:38:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512626091] [2023-08-31 01:38:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512626091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491594289] [2023-08-31 01:38:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:38:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:41,657 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 01:38:41,695 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 01:38:41,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:38:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-31 01:38:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491594289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:41,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-31 01:38:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542953114] [2023-08-31 01:38:41,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:38:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:38:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:38:42,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:38:42,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 651 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:42,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:42,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:38:42,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:42,336 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-08-31 01:38:42,337 INFO L131 PetriNetUnfolder]: For 2219/2245 co-relation queries the response was YES. [2023-08-31 01:38:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 317 events. 177/317 cut-off events. For 2219/2245 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1211 event pairs, 14 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1777. Up to 248 conditions per place. [2023-08-31 01:38:42,340 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-08-31 01:38:42,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 874 flow [2023-08-31 01:38:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1164 transitions. [2023-08-31 01:38:42,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40360610263522884 [2023-08-31 01:38:42,345 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1164 transitions. [2023-08-31 01:38:42,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1164 transitions. [2023-08-31 01:38:42,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:42,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1164 transitions. [2023-08-31 01:38:42,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 01:38:42,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:42,367 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:42,367 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 651 flow. Second operand 7 states and 1164 transitions. [2023-08-31 01:38:42,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 874 flow [2023-08-31 01:38:42,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 794 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-31 01:38:42,374 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 671 flow [2023-08-31 01:38:42,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-08-31 01:38:42,374 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-08-31 01:38:42,374 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 671 flow [2023-08-31 01:38:42,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:42,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:42,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:42,381 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 01:38:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 01:38:42,581 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 01:38:42,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash -292778433, now seen corresponding path program 7 times [2023-08-31 01:38:42,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:42,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21103986] [2023-08-31 01:38:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:42,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:42,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21103986] [2023-08-31 01:38:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21103986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558180157] [2023-08-31 01:38:42,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:38:42,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:42,654 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 01:38:42,657 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 01:38:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:42,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:42,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558180157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:42,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:42,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 01:38:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837741269] [2023-08-31 01:38:42,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:38:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:38:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:38:42,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:42,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states 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 01:38:42,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:42,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:43,039 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2023-08-31 01:38:43,040 INFO L131 PetriNetUnfolder]: For 2406/2406 co-relation queries the response was YES. [2023-08-31 01:38:43,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 403 events. 228/403 cut-off events. For 2406/2406 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1569 event pairs, 15 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2221. Up to 154 conditions per place. [2023-08-31 01:38:43,044 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2023-08-31 01:38:43,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 1146 flow [2023-08-31 01:38:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2023-08-31 01:38:43,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-31 01:38:43,046 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2023-08-31 01:38:43,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2023-08-31 01:38:43,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:43,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2023-08-31 01:38:43,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.57142857142858) internal successors, (1236), 7 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states 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 01:38:43,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:43,052 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:43,053 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 671 flow. Second operand 7 states and 1236 transitions. [2023-08-31 01:38:43,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 1146 flow [2023-08-31 01:38:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 1081 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-31 01:38:43,066 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 764 flow [2023-08-31 01:38:43,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2023-08-31 01:38:43,066 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-08-31 01:38:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 764 flow [2023-08-31 01:38:43,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states 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 01:38:43,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:43,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:43,075 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 01:38:43,273 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,SelfDestructingSolverStorable17 [2023-08-31 01:38:43,273 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 01:38:43,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash 588770887, now seen corresponding path program 8 times [2023-08-31 01:38:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:43,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527940040] [2023-08-31 01:38:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:43,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:43,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:43,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527940040] [2023-08-31 01:38:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527940040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945800779] [2023-08-31 01:38:43,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:38:43,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:43,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:43,344 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 01:38:43,355 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 01:38:43,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:43,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945800779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:43,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:43,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 01:38:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932602873] [2023-08-31 01:38:43,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:38:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:38:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:38:43,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:43,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 764 flow. Second operand has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states 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 01:38:43,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:43,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:43,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:43,773 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2023-08-31 01:38:43,774 INFO L131 PetriNetUnfolder]: For 3259/3259 co-relation queries the response was YES. [2023-08-31 01:38:43,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 413 events. 230/413 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1669 event pairs, 35 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2400. Up to 153 conditions per place. [2023-08-31 01:38:43,778 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2023-08-31 01:38:43,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1335 flow [2023-08-31 01:38:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:38:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:38:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1921 transitions. [2023-08-31 01:38:43,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238746690203001 [2023-08-31 01:38:43,783 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1921 transitions. [2023-08-31 01:38:43,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1921 transitions. [2023-08-31 01:38:43,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:43,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1921 transitions. [2023-08-31 01:38:43,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.63636363636363) internal successors, (1921), 11 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states 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 01:38:43,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:38:43,792 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:38:43,792 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 764 flow. Second operand 11 states and 1921 transitions. [2023-08-31 01:38:43,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1335 flow [2023-08-31 01:38:43,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1288 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-31 01:38:43,804 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 1012 flow [2023-08-31 01:38:43,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1012, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2023-08-31 01:38:43,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-08-31 01:38:43,805 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 1012 flow [2023-08-31 01:38:43,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states 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 01:38:43,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:43,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:43,815 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 01:38:44,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:44,012 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 01:38:44,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 84514537, now seen corresponding path program 9 times [2023-08-31 01:38:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026286186] [2023-08-31 01:38:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026286186] [2023-08-31 01:38:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026286186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882778208] [2023-08-31 01:38:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:38:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:44,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:44,089 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 01:38:44,091 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 01:38:44,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:38:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:44,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882778208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:44,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:44,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 01:38:44,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892259973] [2023-08-31 01:38:44,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:44,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:38:44,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:38:44,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:38:44,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:44,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 1012 flow. Second operand has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states 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 01:38:44,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:44,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:44,592 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2023-08-31 01:38:44,593 INFO L131 PetriNetUnfolder]: For 4464/4464 co-relation queries the response was YES. [2023-08-31 01:38:44,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 492 events. 265/492 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2134 event pairs, 37 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3028. Up to 159 conditions per place. [2023-08-31 01:38:44,598 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2023-08-31 01:38:44,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1910 flow [2023-08-31 01:38:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:38:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:38:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3138 transitions. [2023-08-31 01:38:44,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-08-31 01:38:44,602 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3138 transitions. [2023-08-31 01:38:44,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3138 transitions. [2023-08-31 01:38:44,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:44,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3138 transitions. [2023-08-31 01:38:44,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.33333333333334) internal successors, (3138), 18 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 01:38:44,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:38:44,618 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:38:44,618 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 1012 flow. Second operand 18 states and 3138 transitions. [2023-08-31 01:38:44,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1910 flow [2023-08-31 01:38:44,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1767 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-08-31 01:38:44,633 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 1356 flow [2023-08-31 01:38:44,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1356, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2023-08-31 01:38:44,633 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-08-31 01:38:44,633 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 1356 flow [2023-08-31 01:38:44,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states 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 01:38:44,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:44,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:44,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:38:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:44,840 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 01:38:44,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1635873767, now seen corresponding path program 10 times [2023-08-31 01:38:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288889762] [2023-08-31 01:38:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:44,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288889762] [2023-08-31 01:38:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288889762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:44,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863992595] [2023-08-31 01:38:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:44,907 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 01:38:44,920 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 01:38:44,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:45,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:45,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863992595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:45,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:38:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635204779] [2023-08-31 01:38:45,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:45,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:45,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 01:38:45,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:45,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:45,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:45,460 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2023-08-31 01:38:45,460 INFO L131 PetriNetUnfolder]: For 6497/6497 co-relation queries the response was YES. [2023-08-31 01:38:45,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 591 events. 316/591 cut-off events. For 6497/6497 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2656 event pairs, 19 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3866. Up to 303 conditions per place. [2023-08-31 01:38:45,467 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 119 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2023-08-31 01:38:45,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 2245 flow [2023-08-31 01:38:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:38:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:38:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2459 transitions. [2023-08-31 01:38:45,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263176144244105 [2023-08-31 01:38:45,471 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2459 transitions. [2023-08-31 01:38:45,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2459 transitions. [2023-08-31 01:38:45,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:45,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2459 transitions. [2023-08-31 01:38:45,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.64285714285714) internal successors, (2459), 14 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states 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 01:38:45,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:38:45,479 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:38:45,479 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 1356 flow. Second operand 14 states and 2459 transitions. [2023-08-31 01:38:45,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 2245 flow [2023-08-31 01:38:45,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 2079 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-08-31 01:38:45,526 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1586 flow [2023-08-31 01:38:45,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1586, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-08-31 01:38:45,526 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-08-31 01:38:45,527 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1586 flow [2023-08-31 01:38:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 01:38:45,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:45,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:45,542 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 01:38:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:45,733 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 01:38:45,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1629563245, now seen corresponding path program 11 times [2023-08-31 01:38:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:45,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916235681] [2023-08-31 01:38:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:45,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916235681] [2023-08-31 01:38:45,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916235681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929236285] [2023-08-31 01:38:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:38:45,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:45,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:45,799 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 01:38:45,823 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 01:38:45,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:38:45,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929236285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:45,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:45,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:38:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190410860] [2023-08-31 01:38:45,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:45,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:46,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:46,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1586 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:46,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:46,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:46,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:46,337 INFO L130 PetriNetUnfolder]: 391/758 cut-off events. [2023-08-31 01:38:46,337 INFO L131 PetriNetUnfolder]: For 10396/10396 co-relation queries the response was YES. [2023-08-31 01:38:46,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 758 events. 391/758 cut-off events. For 10396/10396 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3764 event pairs, 81 based on Foata normal form. 8/766 useless extension candidates. Maximal degree in co-relation 5438. Up to 329 conditions per place. [2023-08-31 01:38:46,346 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 116 selfloop transitions, 62 changer transitions 0/178 dead transitions. [2023-08-31 01:38:46,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 178 transitions, 2519 flow [2023-08-31 01:38:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:38:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:38:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2288 transitions. [2023-08-31 01:38:46,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-08-31 01:38:46,350 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2288 transitions. [2023-08-31 01:38:46,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2288 transitions. [2023-08-31 01:38:46,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:46,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2288 transitions. [2023-08-31 01:38:46,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 176.0) internal successors, (2288), 13 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 01:38:46,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:38:46,359 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:38:46,359 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1586 flow. Second operand 13 states and 2288 transitions. [2023-08-31 01:38:46,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 178 transitions, 2519 flow [2023-08-31 01:38:46,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2287 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-31 01:38:46,390 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1857 flow [2023-08-31 01:38:46,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1857, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2023-08-31 01:38:46,390 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-08-31 01:38:46,390 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1857 flow [2023-08-31 01:38:46,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:46,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:46,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:46,406 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 01:38:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:46,597 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 01:38:46,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash 608008723, now seen corresponding path program 12 times [2023-08-31 01:38:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:46,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302994452] [2023-08-31 01:38:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302994452] [2023-08-31 01:38:46,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302994452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680066782] [2023-08-31 01:38:46,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:38:46,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:46,669 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 01:38:46,689 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 01:38:46,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:38:46,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:46,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680066782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:46,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:46,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:38:46,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253841097] [2023-08-31 01:38:46,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:46,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:46,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:46,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1857 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 01:38:46,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:46,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:46,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:47,286 INFO L130 PetriNetUnfolder]: 387/752 cut-off events. [2023-08-31 01:38:47,287 INFO L131 PetriNetUnfolder]: For 10139/10139 co-relation queries the response was YES. [2023-08-31 01:38:47,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 752 events. 387/752 cut-off events. For 10139/10139 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3731 event pairs, 57 based on Foata normal form. 16/764 useless extension candidates. Maximal degree in co-relation 5292. Up to 243 conditions per place. [2023-08-31 01:38:47,295 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 114 selfloop transitions, 71 changer transitions 2/187 dead transitions. [2023-08-31 01:38:47,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2623 flow [2023-08-31 01:38:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:38:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:38:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3145 transitions. [2023-08-31 01:38:47,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408306364617043 [2023-08-31 01:38:47,299 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3145 transitions. [2023-08-31 01:38:47,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3145 transitions. [2023-08-31 01:38:47,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:47,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3145 transitions. [2023-08-31 01:38:47,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.72222222222223) internal successors, (3145), 18 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states 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 01:38:47,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:38:47,311 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:38:47,311 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1857 flow. Second operand 18 states and 3145 transitions. [2023-08-31 01:38:47,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2623 flow [2023-08-31 01:38:47,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 187 transitions, 2501 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-08-31 01:38:47,342 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 1976 flow [2023-08-31 01:38:47,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1976, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2023-08-31 01:38:47,342 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-08-31 01:38:47,342 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 1976 flow [2023-08-31 01:38:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 01:38:47,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:47,343 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:47,358 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 01:38:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:47,558 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 01:38:47,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash -844138731, now seen corresponding path program 13 times [2023-08-31 01:38:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:47,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940127700] [2023-08-31 01:38:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:47,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:47,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940127700] [2023-08-31 01:38:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940127700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:47,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733569521] [2023-08-31 01:38:47,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:38:47,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:47,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:47,632 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 01:38:47,634 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 01:38:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:47,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733569521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:47,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:47,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:38:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965458764] [2023-08-31 01:38:47,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:47,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:47,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 1976 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:47,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:47,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:48,174 INFO L130 PetriNetUnfolder]: 388/747 cut-off events. [2023-08-31 01:38:48,175 INFO L131 PetriNetUnfolder]: For 10712/10712 co-relation queries the response was YES. [2023-08-31 01:38:48,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 747 events. 388/747 cut-off events. For 10712/10712 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3679 event pairs, 13 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 5382. Up to 203 conditions per place. [2023-08-31 01:38:48,184 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 123 selfloop transitions, 86 changer transitions 2/211 dead transitions. [2023-08-31 01:38:48,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 3237 flow [2023-08-31 01:38:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:38:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:38:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3305 transitions. [2023-08-31 01:38:48,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222023505365355 [2023-08-31 01:38:48,189 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3305 transitions. [2023-08-31 01:38:48,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3305 transitions. [2023-08-31 01:38:48,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:48,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3305 transitions. [2023-08-31 01:38:48,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.94736842105263) internal successors, (3305), 19 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states 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 01:38:48,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states 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 01:38:48,203 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states 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 01:38:48,203 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 1976 flow. Second operand 19 states and 3305 transitions. [2023-08-31 01:38:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 3237 flow [2023-08-31 01:38:48,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2965 flow, removed 91 selfloop flow, removed 10 redundant places. [2023-08-31 01:38:48,240 INFO L231 Difference]: Finished difference. Result has 157 places, 157 transitions, 2334 flow [2023-08-31 01:38:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2334, PETRI_PLACES=157, PETRI_TRANSITIONS=157} [2023-08-31 01:38:48,242 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-08-31 01:38:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 157 transitions, 2334 flow [2023-08-31 01:38:48,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:48,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:48,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:48,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-31 01:38:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:48,448 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 01:38:48,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash -205590883, now seen corresponding path program 14 times [2023-08-31 01:38:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:48,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483504402] [2023-08-31 01:38:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:48,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:48,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483504402] [2023-08-31 01:38:48,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483504402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:48,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144370506] [2023-08-31 01:38:48,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:38:48,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:48,521 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 01:38:48,548 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 01:38:48,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:48,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:48,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144370506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:48,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:48,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:38:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535175341] [2023-08-31 01:38:48,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:38:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:38:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:38:48,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:48,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 2334 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:48,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:48,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:48,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:49,120 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-08-31 01:38:49,121 INFO L131 PetriNetUnfolder]: For 18104/18104 co-relation queries the response was YES. [2023-08-31 01:38:49,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 1111 events. 564/1111 cut-off events. For 18104/18104 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6245 event pairs, 45 based on Foata normal form. 18/1121 useless extension candidates. Maximal degree in co-relation 8074. Up to 406 conditions per place. [2023-08-31 01:38:49,143 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 152 selfloop transitions, 117 changer transitions 0/269 dead transitions. [2023-08-31 01:38:49,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 269 transitions, 4223 flow [2023-08-31 01:38:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:38:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:38:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2637 transitions. [2023-08-31 01:38:49,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266990291262136 [2023-08-31 01:38:49,147 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2637 transitions. [2023-08-31 01:38:49,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2637 transitions. [2023-08-31 01:38:49,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:49,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2637 transitions. [2023-08-31 01:38:49,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.8) internal successors, (2637), 15 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states 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 01:38:49,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:38:49,157 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:38:49,157 INFO L175 Difference]: Start difference. First operand has 157 places, 157 transitions, 2334 flow. Second operand 15 states and 2637 transitions. [2023-08-31 01:38:49,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 269 transitions, 4223 flow [2023-08-31 01:38:49,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 3910 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-08-31 01:38:49,219 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 3262 flow [2023-08-31 01:38:49,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3262, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2023-08-31 01:38:49,219 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-08-31 01:38:49,220 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 3262 flow [2023-08-31 01:38:49,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:49,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:49,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:49,231 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 01:38:49,427 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,SelfDestructingSolverStorable24 [2023-08-31 01:38:49,427 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 01:38:49,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1054951077, now seen corresponding path program 15 times [2023-08-31 01:38:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:49,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244225632] [2023-08-31 01:38:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:49,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244225632] [2023-08-31 01:38:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244225632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982269412] [2023-08-31 01:38:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:38:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:49,508 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 01:38:49,525 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 01:38:49,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:38:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:38:49,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982269412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:49,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:49,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:38:49,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051265086] [2023-08-31 01:38:49,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:49,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:38:49,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:38:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:38:49,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:49,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 3262 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:49,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:49,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:50,195 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-08-31 01:38:50,195 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2023-08-31 01:38:50,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8557 conditions, 1133 events. 566/1133 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6498 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 8496. Up to 342 conditions per place. [2023-08-31 01:38:50,209 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 148 selfloop transitions, 127 changer transitions 2/277 dead transitions. [2023-08-31 01:38:50,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 4574 flow [2023-08-31 01:38:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:38:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:38:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3657 transitions. [2023-08-31 01:38:50,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226768377253814 [2023-08-31 01:38:50,214 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3657 transitions. [2023-08-31 01:38:50,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3657 transitions. [2023-08-31 01:38:50,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:50,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3657 transitions. [2023-08-31 01:38:50,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.14285714285714) internal successors, (3657), 21 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states 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 01:38:50,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states 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 01:38:50,263 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states 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 01:38:50,263 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 3262 flow. Second operand 21 states and 3657 transitions. [2023-08-31 01:38:50,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 4574 flow [2023-08-31 01:38:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 277 transitions, 4415 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-08-31 01:38:50,329 INFO L231 Difference]: Finished difference. Result has 188 places, 211 transitions, 3597 flow [2023-08-31 01:38:50,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3597, PETRI_PLACES=188, PETRI_TRANSITIONS=211} [2023-08-31 01:38:50,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-08-31 01:38:50,331 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 211 transitions, 3597 flow [2023-08-31 01:38:50,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:50,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:50,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:50,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 01:38:50,537 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,SelfDestructingSolverStorable25 [2023-08-31 01:38:50,537 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 01:38:50,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1615313315, now seen corresponding path program 16 times [2023-08-31 01:38:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380529044] [2023-08-31 01:38:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:50,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380529044] [2023-08-31 01:38:50,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380529044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:50,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998262704] [2023-08-31 01:38:50,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:50,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:50,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:50,615 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 01:38:50,640 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 01:38:50,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:50,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:50,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:50,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:50,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:50,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998262704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:50,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:50,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 01:38:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664830413] [2023-08-31 01:38:50,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:50,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:38:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:38:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:38:50,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:50,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 211 transitions, 3597 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states 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 01:38:50,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:50,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:50,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:51,309 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-08-31 01:38:51,310 INFO L131 PetriNetUnfolder]: For 23382/23382 co-relation queries the response was YES. [2023-08-31 01:38:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 1260 events. 629/1260 cut-off events. For 23382/23382 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7379 event pairs, 27 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 9912. Up to 359 conditions per place. [2023-08-31 01:38:51,323 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 147 selfloop transitions, 141 changer transitions 4/292 dead transitions. [2023-08-31 01:38:51,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 292 transitions, 5271 flow [2023-08-31 01:38:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:38:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:38:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3478 transitions. [2023-08-31 01:38:51,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220873786407767 [2023-08-31 01:38:51,334 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3478 transitions. [2023-08-31 01:38:51,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3478 transitions. [2023-08-31 01:38:51,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:51,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3478 transitions. [2023-08-31 01:38:51,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 173.9) internal successors, (3478), 20 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states 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 01:38:51,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:38:51,350 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:38:51,350 INFO L175 Difference]: Start difference. First operand has 188 places, 211 transitions, 3597 flow. Second operand 20 states and 3478 transitions. [2023-08-31 01:38:51,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 292 transitions, 5271 flow [2023-08-31 01:38:51,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 4963 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-08-31 01:38:51,432 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 4307 flow [2023-08-31 01:38:51,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4307, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2023-08-31 01:38:51,432 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-31 01:38:51,433 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 4307 flow [2023-08-31 01:38:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states 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 01:38:51,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:51,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:51,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 01:38:51,639 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,SelfDestructingSolverStorable26 [2023-08-31 01:38:51,640 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 01:38:51,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1858772581, now seen corresponding path program 17 times [2023-08-31 01:38:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:51,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306139308] [2023-08-31 01:38:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:51,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:51,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306139308] [2023-08-31 01:38:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306139308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:51,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92460976] [2023-08-31 01:38:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:38:51,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:51,715 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 01:38:51,718 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 01:38:51,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:51,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92460976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:51,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 01:38:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932581091] [2023-08-31 01:38:51,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:51,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:38:51,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:38:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:38:51,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:51,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 4307 flow. Second operand has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 01:38:51,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:51,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:52,563 INFO L130 PetriNetUnfolder]: 658/1339 cut-off events. [2023-08-31 01:38:52,563 INFO L131 PetriNetUnfolder]: For 29848/29848 co-relation queries the response was YES. [2023-08-31 01:38:52,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 1339 events. 658/1339 cut-off events. For 29848/29848 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8174 event pairs, 27 based on Foata normal form. 24/1363 useless extension candidates. Maximal degree in co-relation 10994. Up to 595 conditions per place. [2023-08-31 01:38:52,579 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 212 selfloop transitions, 105 changer transitions 7/324 dead transitions. [2023-08-31 01:38:52,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 6036 flow [2023-08-31 01:38:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:38:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:38:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4009 transitions. [2023-08-31 01:38:52,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230688054031237 [2023-08-31 01:38:52,585 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4009 transitions. [2023-08-31 01:38:52,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4009 transitions. [2023-08-31 01:38:52,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:52,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4009 transitions. [2023-08-31 01:38:52,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.30434782608697) internal successors, (4009), 23 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states 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 01:38:52,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:38:52,600 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:38:52,600 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 4307 flow. Second operand 23 states and 4009 transitions. [2023-08-31 01:38:52,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 6036 flow [2023-08-31 01:38:52,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 5854 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-08-31 01:38:52,719 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 4920 flow [2023-08-31 01:38:52,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4920, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2023-08-31 01:38:52,724 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-31 01:38:52,724 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 4920 flow [2023-08-31 01:38:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states 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 01:38:52,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:52,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:52,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-31 01:38:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:52,931 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 01:38:52,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -2139611511, now seen corresponding path program 18 times [2023-08-31 01:38:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:52,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202193639] [2023-08-31 01:38:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202193639] [2023-08-31 01:38:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202193639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827762625] [2023-08-31 01:38:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:38:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:52,998 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 01:38:53,020 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 01:38:53,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:38:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827762625] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:53,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:53,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 01:38:53,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313542389] [2023-08-31 01:38:53,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:53,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:38:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:38:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:38:53,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:53,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 4920 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states 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 01:38:53,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:53,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:53,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:53,885 INFO L130 PetriNetUnfolder]: 776/1587 cut-off events. [2023-08-31 01:38:53,885 INFO L131 PetriNetUnfolder]: For 49092/49092 co-relation queries the response was YES. [2023-08-31 01:38:53,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 1587 events. 776/1587 cut-off events. For 49092/49092 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10130 event pairs, 116 based on Foata normal form. 16/1603 useless extension candidates. Maximal degree in co-relation 14257. Up to 472 conditions per place. [2023-08-31 01:38:53,906 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 227 selfloop transitions, 143 changer transitions 4/374 dead transitions. [2023-08-31 01:38:53,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 374 transitions, 7969 flow [2023-08-31 01:38:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:38:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:38:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4005 transitions. [2023-08-31 01:38:53,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226466863655551 [2023-08-31 01:38:53,945 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4005 transitions. [2023-08-31 01:38:53,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4005 transitions. [2023-08-31 01:38:53,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:53,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4005 transitions. [2023-08-31 01:38:53,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.1304347826087) internal successors, (4005), 23 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states 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 01:38:53,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:38:53,957 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:38:53,957 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 4920 flow. Second operand 23 states and 4005 transitions. [2023-08-31 01:38:53,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 374 transitions, 7969 flow [2023-08-31 01:38:54,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 374 transitions, 6986 flow, removed 398 selfloop flow, removed 11 redundant places. [2023-08-31 01:38:54,131 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 6227 flow [2023-08-31 01:38:54,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6227, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2023-08-31 01:38:54,132 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-31 01:38:54,133 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 6227 flow [2023-08-31 01:38:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states 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 01:38:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:54,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:54,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-31 01:38:54,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 01:38:54,338 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 01:38:54,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash 988708695, now seen corresponding path program 19 times [2023-08-31 01:38:54,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:54,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856195795] [2023-08-31 01:38:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:54,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856195795] [2023-08-31 01:38:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856195795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88192538] [2023-08-31 01:38:54,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:38:54,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:54,405 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 01:38:54,408 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 01:38:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:54,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:54,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:54,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88192538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:54,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:54,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:38:54,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973673108] [2023-08-31 01:38:54,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:54,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:38:54,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:38:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:38:54,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:54,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 6227 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:54,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:54,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:55,176 INFO L130 PetriNetUnfolder]: 862/1779 cut-off events. [2023-08-31 01:38:55,177 INFO L131 PetriNetUnfolder]: For 62137/62137 co-relation queries the response was YES. [2023-08-31 01:38:55,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 1779 events. 862/1779 cut-off events. For 62137/62137 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11790 event pairs, 195 based on Foata normal form. 40/1819 useless extension candidates. Maximal degree in co-relation 15783. Up to 1019 conditions per place. [2023-08-31 01:38:55,196 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 263 selfloop transitions, 121 changer transitions 0/384 dead transitions. [2023-08-31 01:38:55,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 8294 flow [2023-08-31 01:38:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:38:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:38:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-08-31 01:38:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268110530246453 [2023-08-31 01:38:55,199 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-08-31 01:38:55,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-08-31 01:38:55,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:55,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-08-31 01:38:55,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 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 01:38:55,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:38:55,206 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:38:55,206 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 6227 flow. Second operand 13 states and 2286 transitions. [2023-08-31 01:38:55,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 8294 flow [2023-08-31 01:38:55,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 384 transitions, 7514 flow, removed 368 selfloop flow, removed 8 redundant places. [2023-08-31 01:38:55,440 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 6310 flow [2023-08-31 01:38:55,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6310, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2023-08-31 01:38:55,441 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-08-31 01:38:55,441 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 6310 flow [2023-08-31 01:38:55,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:38:55,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:55,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:55,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-31 01:38:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:55,642 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 01:38:55,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1226313027, now seen corresponding path program 20 times [2023-08-31 01:38:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697572233] [2023-08-31 01:38:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:55,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:55,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697572233] [2023-08-31 01:38:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697572233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901411783] [2023-08-31 01:38:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:38:55,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:55,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:55,709 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 01:38:55,731 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 01:38:55,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:38:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901411783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:55,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:38:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989538792] [2023-08-31 01:38:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:38:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:38:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:38:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:55,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 6310 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:55,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:55,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:55,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:56,516 INFO L130 PetriNetUnfolder]: 928/1905 cut-off events. [2023-08-31 01:38:56,516 INFO L131 PetriNetUnfolder]: For 55076/55076 co-relation queries the response was YES. [2023-08-31 01:38:56,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 1905 events. 928/1905 cut-off events. For 55076/55076 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12743 event pairs, 156 based on Foata normal form. 6/1911 useless extension candidates. Maximal degree in co-relation 16297. Up to 640 conditions per place. [2023-08-31 01:38:56,533 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 245 selfloop transitions, 144 changer transitions 2/391 dead transitions. [2023-08-31 01:38:56,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 7993 flow [2023-08-31 01:38:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:38:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:38:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2960 transitions. [2023-08-31 01:38:56,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422615648201028 [2023-08-31 01:38:56,538 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2960 transitions. [2023-08-31 01:38:56,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2960 transitions. [2023-08-31 01:38:56,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:56,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2960 transitions. [2023-08-31 01:38:56,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 174.11764705882354) internal successors, (2960), 17 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:38:56,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states 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 01:38:56,547 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states 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 01:38:56,547 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 6310 flow. Second operand 17 states and 2960 transitions. [2023-08-31 01:38:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 7993 flow [2023-08-31 01:38:56,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 7571 flow, removed 179 selfloop flow, removed 6 redundant places. [2023-08-31 01:38:56,801 INFO L231 Difference]: Finished difference. Result has 263 places, 341 transitions, 6828 flow [2023-08-31 01:38:56,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6828, PETRI_PLACES=263, PETRI_TRANSITIONS=341} [2023-08-31 01:38:56,802 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 243 predicate places. [2023-08-31 01:38:56,802 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 341 transitions, 6828 flow [2023-08-31 01:38:56,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:38:56,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:56,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:56,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 01:38:57,003 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,SelfDestructingSolverStorable30 [2023-08-31 01:38:57,003 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 01:38:57,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:57,003 INFO L85 PathProgramCache]: Analyzing trace with hash -915768439, now seen corresponding path program 21 times [2023-08-31 01:38:57,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516159292] [2023-08-31 01:38:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:57,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516159292] [2023-08-31 01:38:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516159292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591169265] [2023-08-31 01:38:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:38:57,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:57,064 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 01:38:57,074 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 01:38:57,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:38:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:57,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591169265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:57,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 01:38:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215186223] [2023-08-31 01:38:57,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:57,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:38:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:57,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:38:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:38:57,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:57,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 341 transitions, 6828 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 01:38:57,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:57,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:57,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:57,795 INFO L130 PetriNetUnfolder]: 927/1906 cut-off events. [2023-08-31 01:38:57,795 INFO L131 PetriNetUnfolder]: For 54564/54564 co-relation queries the response was YES. [2023-08-31 01:38:57,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16583 conditions, 1906 events. 927/1906 cut-off events. For 54564/54564 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12775 event pairs, 173 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 16491. Up to 1010 conditions per place. [2023-08-31 01:38:57,812 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 234 selfloop transitions, 132 changer transitions 5/371 dead transitions. [2023-08-31 01:38:57,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 7954 flow [2023-08-31 01:38:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:38:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:38:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1912 transitions. [2023-08-31 01:38:57,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42188879082082964 [2023-08-31 01:38:57,815 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1912 transitions. [2023-08-31 01:38:57,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1912 transitions. [2023-08-31 01:38:57,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:57,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1912 transitions. [2023-08-31 01:38:57,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.8181818181818) internal successors, (1912), 11 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states 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 01:38:57,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:38:57,821 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:38:57,821 INFO L175 Difference]: Start difference. First operand has 263 places, 341 transitions, 6828 flow. Second operand 11 states and 1912 transitions. [2023-08-31 01:38:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 7954 flow [2023-08-31 01:38:58,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 371 transitions, 7896 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 01:38:58,049 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 7082 flow [2023-08-31 01:38:58,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7082, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2023-08-31 01:38:58,049 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-08-31 01:38:58,049 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 7082 flow [2023-08-31 01:38:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 01:38:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:58,050 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:58,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-31 01:38:58,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:58,251 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 01:38:58,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 222682459, now seen corresponding path program 22 times [2023-08-31 01:38:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:58,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887924829] [2023-08-31 01:38:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:58,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887924829] [2023-08-31 01:38:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887924829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34737794] [2023-08-31 01:38:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:38:58,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:58,315 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 01:38:58,321 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 01:38:58,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:38:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:58,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34737794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:58,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:58,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-31 01:38:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722329844] [2023-08-31 01:38:58,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:38:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:38:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:38:58,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:58,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 7082 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 01:38:58,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:58,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:38:59,097 INFO L130 PetriNetUnfolder]: 943/1930 cut-off events. [2023-08-31 01:38:59,098 INFO L131 PetriNetUnfolder]: For 57665/57665 co-relation queries the response was YES. [2023-08-31 01:38:59,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 1930 events. 943/1930 cut-off events. For 57665/57665 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12878 event pairs, 58 based on Foata normal form. 10/1940 useless extension candidates. Maximal degree in co-relation 17081. Up to 1497 conditions per place. [2023-08-31 01:38:59,125 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 285 selfloop transitions, 88 changer transitions 0/373 dead transitions. [2023-08-31 01:38:59,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 8278 flow [2023-08-31 01:38:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:38:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:38:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1230 transitions. [2023-08-31 01:38:59,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264909847434119 [2023-08-31 01:38:59,128 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1230 transitions. [2023-08-31 01:38:59,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1230 transitions. [2023-08-31 01:38:59,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:38:59,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1230 transitions. [2023-08-31 01:38:59,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 01:38:59,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:59,183 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states 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 01:38:59,183 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 7082 flow. Second operand 7 states and 1230 transitions. [2023-08-31 01:38:59,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 8278 flow [2023-08-31 01:38:59,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 373 transitions, 8215 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-31 01:38:59,429 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 7341 flow [2023-08-31 01:38:59,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7341, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2023-08-31 01:38:59,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-08-31 01:38:59,430 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 7341 flow [2023-08-31 01:38:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states 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 01:38:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:38:59,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:38:59,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-31 01:38:59,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:59,632 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 01:38:59,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:38:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -127101819, now seen corresponding path program 23 times [2023-08-31 01:38:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:38:59,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498682924] [2023-08-31 01:38:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:38:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:38:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:38:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:59,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:38:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498682924] [2023-08-31 01:38:59,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498682924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:38:59,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470047836] [2023-08-31 01:38:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:38:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:38:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:38:59,697 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 01:38:59,719 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 01:38:59,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:38:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:38:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:38:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:38:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:38:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:38:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470047836] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:38:59,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:38:59,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:38:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943535561] [2023-08-31 01:38:59,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:38:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:38:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:38:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:38:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:38:59,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:38:59,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 7341 flow. Second operand has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 01:38:59,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:38:59,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:38:59,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:00,579 INFO L130 PetriNetUnfolder]: 978/2007 cut-off events. [2023-08-31 01:39:00,579 INFO L131 PetriNetUnfolder]: For 61128/61128 co-relation queries the response was YES. [2023-08-31 01:39:00,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18001 conditions, 2007 events. 978/2007 cut-off events. For 61128/61128 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13589 event pairs, 34 based on Foata normal form. 16/2023 useless extension candidates. Maximal degree in co-relation 17905. Up to 945 conditions per place. [2023-08-31 01:39:00,598 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 289 selfloop transitions, 144 changer transitions 1/434 dead transitions. [2023-08-31 01:39:00,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 434 transitions, 9253 flow [2023-08-31 01:39:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:39:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:39:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3829 transitions. [2023-08-31 01:39:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224404236540159 [2023-08-31 01:39:00,602 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3829 transitions. [2023-08-31 01:39:00,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3829 transitions. [2023-08-31 01:39:00,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:00,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3829 transitions. [2023-08-31 01:39:00,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.04545454545453) internal successors, (3829), 22 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states 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 01:39:00,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:39:00,612 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:39:00,613 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 7341 flow. Second operand 22 states and 3829 transitions. [2023-08-31 01:39:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 434 transitions, 9253 flow [2023-08-31 01:39:00,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 9061 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-31 01:39:00,879 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 8028 flow [2023-08-31 01:39:00,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8028, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2023-08-31 01:39:00,879 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-08-31 01:39:00,880 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 8028 flow [2023-08-31 01:39:00,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 01:39:00,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:00,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:00,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-31 01:39:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:01,086 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 01:39:01,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1017412653, now seen corresponding path program 24 times [2023-08-31 01:39:01,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:01,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829391462] [2023-08-31 01:39:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:01,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829391462] [2023-08-31 01:39:01,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829391462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712798095] [2023-08-31 01:39:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:39:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:01,153 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 01:39:01,174 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 01:39:01,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:39:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:01,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:39:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712798095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:01,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:39:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031965609] [2023-08-31 01:39:01,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:01,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:39:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:39:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:39:01,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:01,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 8028 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:01,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:01,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:01,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:02,005 INFO L130 PetriNetUnfolder]: 981/2002 cut-off events. [2023-08-31 01:39:02,005 INFO L131 PetriNetUnfolder]: For 66776/66776 co-relation queries the response was YES. [2023-08-31 01:39:02,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 2002 events. 981/2002 cut-off events. For 66776/66776 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 13431 event pairs, 80 based on Foata normal form. 22/2024 useless extension candidates. Maximal degree in co-relation 18649. Up to 1634 conditions per place. [2023-08-31 01:39:02,022 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 333 selfloop transitions, 82 changer transitions 0/415 dead transitions. [2023-08-31 01:39:02,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 415 transitions, 9353 flow [2023-08-31 01:39:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:39:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:39:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2618 transitions. [2023-08-31 01:39:02,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236245954692557 [2023-08-31 01:39:02,026 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2618 transitions. [2023-08-31 01:39:02,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2618 transitions. [2023-08-31 01:39:02,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:02,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2618 transitions. [2023-08-31 01:39:02,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 174.53333333333333) internal successors, (2618), 15 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 01:39:02,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:39:02,035 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:39:02,035 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 8028 flow. Second operand 15 states and 2618 transitions. [2023-08-31 01:39:02,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 415 transitions, 9353 flow [2023-08-31 01:39:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 415 transitions, 9204 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-31 01:39:02,312 INFO L231 Difference]: Finished difference. Result has 305 places, 378 transitions, 8217 flow [2023-08-31 01:39:02,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8217, PETRI_PLACES=305, PETRI_TRANSITIONS=378} [2023-08-31 01:39:02,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2023-08-31 01:39:02,312 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 378 transitions, 8217 flow [2023-08-31 01:39:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:02,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:02,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:02,319 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 01:39:02,517 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,SelfDestructingSolverStorable34 [2023-08-31 01:39:02,517 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 01:39:02,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -591752163, now seen corresponding path program 25 times [2023-08-31 01:39:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797492082] [2023-08-31 01:39:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:02,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797492082] [2023-08-31 01:39:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797492082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171272931] [2023-08-31 01:39:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:39:02,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:02,613 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 01:39:02,635 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 01:39:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:02,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:02,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171272931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:02,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:02,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-31 01:39:02,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680179275] [2023-08-31 01:39:02,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:39:02,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:39:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:39:02,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:02,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 378 transitions, 8217 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:02,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:02,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:02,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:03,519 INFO L130 PetriNetUnfolder]: 1097/2244 cut-off events. [2023-08-31 01:39:03,520 INFO L131 PetriNetUnfolder]: For 81764/81764 co-relation queries the response was YES. [2023-08-31 01:39:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21637 conditions, 2244 events. 1097/2244 cut-off events. For 81764/81764 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15527 event pairs, 74 based on Foata normal form. 16/2260 useless extension candidates. Maximal degree in co-relation 21529. Up to 1322 conditions per place. [2023-08-31 01:39:03,542 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 331 selfloop transitions, 148 changer transitions 0/479 dead transitions. [2023-08-31 01:39:03,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 479 transitions, 11097 flow [2023-08-31 01:39:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 01:39:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 01:39:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2629 transitions. [2023-08-31 01:39:03,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254045307443366 [2023-08-31 01:39:03,545 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2629 transitions. [2023-08-31 01:39:03,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2629 transitions. [2023-08-31 01:39:03,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:03,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2629 transitions. [2023-08-31 01:39:03,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.26666666666668) internal successors, (2629), 15 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states 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 01:39:03,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:39:03,552 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states 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 01:39:03,552 INFO L175 Difference]: Start difference. First operand has 305 places, 378 transitions, 8217 flow. Second operand 15 states and 2629 transitions. [2023-08-31 01:39:03,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 479 transitions, 11097 flow [2023-08-31 01:39:03,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 479 transitions, 10869 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-31 01:39:03,888 INFO L231 Difference]: Finished difference. Result has 315 places, 411 transitions, 9359 flow [2023-08-31 01:39:03,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8011, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9359, PETRI_PLACES=315, PETRI_TRANSITIONS=411} [2023-08-31 01:39:03,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-08-31 01:39:03,889 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 411 transitions, 9359 flow [2023-08-31 01:39:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:03,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:03,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:03,895 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 01:39:04,095 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,SelfDestructingSolverStorable35 [2023-08-31 01:39:04,096 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 01:39:04,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 179362069, now seen corresponding path program 26 times [2023-08-31 01:39:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653482069] [2023-08-31 01:39:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653482069] [2023-08-31 01:39:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653482069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436621785] [2023-08-31 01:39:04,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:04,162 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 01:39:04,188 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 01:39:04,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:04,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:04,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:04,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:04,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436621785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:04,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:04,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 01:39:04,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917734534] [2023-08-31 01:39:04,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:04,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:39:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:04,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:39:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:39:04,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:04,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 411 transitions, 9359 flow. Second operand has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 01:39:04,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:04,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:04,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:05,037 INFO L130 PetriNetUnfolder]: 1134/2297 cut-off events. [2023-08-31 01:39:05,037 INFO L131 PetriNetUnfolder]: For 85699/85699 co-relation queries the response was YES. [2023-08-31 01:39:05,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22998 conditions, 2297 events. 1134/2297 cut-off events. For 85699/85699 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15770 event pairs, 96 based on Foata normal form. 12/2309 useless extension candidates. Maximal degree in co-relation 22887. Up to 2035 conditions per place. [2023-08-31 01:39:05,062 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 375 selfloop transitions, 76 changer transitions 0/451 dead transitions. [2023-08-31 01:39:05,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 451 transitions, 11023 flow [2023-08-31 01:39:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1917 transitions. [2023-08-31 01:39:05,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229920564872021 [2023-08-31 01:39:05,110 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1917 transitions. [2023-08-31 01:39:05,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1917 transitions. [2023-08-31 01:39:05,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:05,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1917 transitions. [2023-08-31 01:39:05,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.27272727272728) internal successors, (1917), 11 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states 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 01:39:05,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:05,115 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:05,115 INFO L175 Difference]: Start difference. First operand has 315 places, 411 transitions, 9359 flow. Second operand 11 states and 1917 transitions. [2023-08-31 01:39:05,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 451 transitions, 11023 flow [2023-08-31 01:39:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 451 transitions, 10660 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-08-31 01:39:05,496 INFO L231 Difference]: Finished difference. Result has 312 places, 428 transitions, 9632 flow [2023-08-31 01:39:05,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8925, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9632, PETRI_PLACES=312, PETRI_TRANSITIONS=428} [2023-08-31 01:39:05,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-31 01:39:05,497 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 428 transitions, 9632 flow [2023-08-31 01:39:05,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states 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 01:39:05,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:05,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:05,502 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 01:39:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:05,698 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 01:39:05,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1678716689, now seen corresponding path program 27 times [2023-08-31 01:39:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:05,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168019188] [2023-08-31 01:39:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:05,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:05,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168019188] [2023-08-31 01:39:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168019188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522773010] [2023-08-31 01:39:05,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:39:05,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:05,761 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 01:39:05,783 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 01:39:05,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:39:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:05,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522773010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:05,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:39:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868730255] [2023-08-31 01:39:05,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:39:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:39:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:39:05,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:05,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 428 transitions, 9632 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:39:05,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:05,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:05,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:06,734 INFO L130 PetriNetUnfolder]: 1192/2425 cut-off events. [2023-08-31 01:39:06,734 INFO L131 PetriNetUnfolder]: For 90262/90262 co-relation queries the response was YES. [2023-08-31 01:39:06,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 2425 events. 1192/2425 cut-off events. For 90262/90262 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 16940 event pairs, 94 based on Foata normal form. 12/2437 useless extension candidates. Maximal degree in co-relation 23957. Up to 1795 conditions per place. [2023-08-31 01:39:06,772 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 358 selfloop transitions, 135 changer transitions 0/493 dead transitions. [2023-08-31 01:39:06,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 493 transitions, 11552 flow [2023-08-31 01:39:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:39:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:39:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2450 transitions. [2023-08-31 01:39:06,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42475728155339804 [2023-08-31 01:39:06,775 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2450 transitions. [2023-08-31 01:39:06,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2450 transitions. [2023-08-31 01:39:06,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:06,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2450 transitions. [2023-08-31 01:39:06,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.0) internal successors, (2450), 14 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states 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 01:39:06,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:39:06,785 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:39:06,785 INFO L175 Difference]: Start difference. First operand has 312 places, 428 transitions, 9632 flow. Second operand 14 states and 2450 transitions. [2023-08-31 01:39:06,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 493 transitions, 11552 flow [2023-08-31 01:39:07,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 493 transitions, 11350 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-08-31 01:39:07,229 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 10178 flow [2023-08-31 01:39:07,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10178, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2023-08-31 01:39:07,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 301 predicate places. [2023-08-31 01:39:07,230 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 10178 flow [2023-08-31 01:39:07,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:39:07,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:07,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:07,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:07,436 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,SelfDestructingSolverStorable37 [2023-08-31 01:39:07,436 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 01:39:07,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1591495955, now seen corresponding path program 28 times [2023-08-31 01:39:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947391686] [2023-08-31 01:39:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947391686] [2023-08-31 01:39:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947391686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955487235] [2023-08-31 01:39:07,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:39:07,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:07,498 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 01:39:07,501 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 01:39:07,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:39:07,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:07,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955487235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:07,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:39:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174485292] [2023-08-31 01:39:07,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:39:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:39:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:39:07,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:07,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 10178 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 01:39:07,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:07,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:08,454 INFO L130 PetriNetUnfolder]: 1174/2377 cut-off events. [2023-08-31 01:39:08,454 INFO L131 PetriNetUnfolder]: For 90642/90642 co-relation queries the response was YES. [2023-08-31 01:39:08,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24034 conditions, 2377 events. 1174/2377 cut-off events. For 90642/90642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16482 event pairs, 40 based on Foata normal form. 12/2389 useless extension candidates. Maximal degree in co-relation 23923. Up to 1021 conditions per place. [2023-08-31 01:39:08,477 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 295 selfloop transitions, 196 changer transitions 4/495 dead transitions. [2023-08-31 01:39:08,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 11925 flow [2023-08-31 01:39:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 01:39:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 01:39:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3297 transitions. [2023-08-31 01:39:08,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211803781297905 [2023-08-31 01:39:08,479 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3297 transitions. [2023-08-31 01:39:08,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3297 transitions. [2023-08-31 01:39:08,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:08,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3297 transitions. [2023-08-31 01:39:08,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.52631578947367) internal successors, (3297), 19 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states 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 01:39:08,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states 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 01:39:08,485 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states 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 01:39:08,485 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 10178 flow. Second operand 19 states and 3297 transitions. [2023-08-31 01:39:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 11925 flow [2023-08-31 01:39:08,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 495 transitions, 11751 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-08-31 01:39:08,856 INFO L231 Difference]: Finished difference. Result has 330 places, 444 transitions, 10466 flow [2023-08-31 01:39:08,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10466, PETRI_PLACES=330, PETRI_TRANSITIONS=444} [2023-08-31 01:39:08,857 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-08-31 01:39:08,857 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 444 transitions, 10466 flow [2023-08-31 01:39:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 01:39:08,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:08,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:08,862 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 01:39:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 01:39:09,058 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 01:39:09,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 139348501, now seen corresponding path program 29 times [2023-08-31 01:39:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876311725] [2023-08-31 01:39:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876311725] [2023-08-31 01:39:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876311725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993165993] [2023-08-31 01:39:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:39:09,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:09,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:09,117 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 01:39:09,139 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 01:39:09,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:09,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:09,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:09,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:09,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993165993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:09,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:09,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-31 01:39:09,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786926083] [2023-08-31 01:39:09,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:09,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:39:09,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:39:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:39:09,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:09,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 444 transitions, 10466 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:39:09,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:09,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:09,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:10,121 INFO L130 PetriNetUnfolder]: 1165/2364 cut-off events. [2023-08-31 01:39:10,121 INFO L131 PetriNetUnfolder]: For 93176/93176 co-relation queries the response was YES. [2023-08-31 01:39:10,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 2364 events. 1165/2364 cut-off events. For 93176/93176 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16451 event pairs, 168 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 24489. Up to 704 conditions per place. [2023-08-31 01:39:10,149 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 309 selfloop transitions, 198 changer transitions 2/509 dead transitions. [2023-08-31 01:39:10,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 12497 flow [2023-08-31 01:39:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 01:39:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 01:39:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3135 transitions. [2023-08-31 01:39:10,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227346278317152 [2023-08-31 01:39:10,151 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3135 transitions. [2023-08-31 01:39:10,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3135 transitions. [2023-08-31 01:39:10,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:10,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3135 transitions. [2023-08-31 01:39:10,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.16666666666666) internal successors, (3135), 18 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states 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 01:39:10,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:39:10,156 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states 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 01:39:10,156 INFO L175 Difference]: Start difference. First operand has 330 places, 444 transitions, 10466 flow. Second operand 18 states and 3135 transitions. [2023-08-31 01:39:10,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 12497 flow [2023-08-31 01:39:10,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 12320 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-31 01:39:10,574 INFO L231 Difference]: Finished difference. Result has 334 places, 449 transitions, 10940 flow [2023-08-31 01:39:10,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10940, PETRI_PLACES=334, PETRI_TRANSITIONS=449} [2023-08-31 01:39:10,575 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-08-31 01:39:10,575 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 449 transitions, 10940 flow [2023-08-31 01:39:10,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 01:39:10,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:10,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:10,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:10,781 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,SelfDestructingSolverStorable39 [2023-08-31 01:39:10,782 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 01:39:10,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash -421013737, now seen corresponding path program 30 times [2023-08-31 01:39:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889534781] [2023-08-31 01:39:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889534781] [2023-08-31 01:39:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889534781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734070404] [2023-08-31 01:39:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:39:10,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:10,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:10,857 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 01:39:10,879 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 01:39:10,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:39:10,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 01:39:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:11,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734070404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:11,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 01:39:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018119780] [2023-08-31 01:39:11,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:39:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:39:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:39:11,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:11,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 449 transitions, 10940 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:11,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:11,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:11,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:11,925 INFO L130 PetriNetUnfolder]: 1160/2349 cut-off events. [2023-08-31 01:39:11,926 INFO L131 PetriNetUnfolder]: For 95384/95384 co-relation queries the response was YES. [2023-08-31 01:39:11,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 2349 events. 1160/2349 cut-off events. For 95384/95384 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16327 event pairs, 214 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 24935. Up to 900 conditions per place. [2023-08-31 01:39:11,953 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 320 selfloop transitions, 163 changer transitions 4/487 dead transitions. [2023-08-31 01:39:11,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 487 transitions, 12329 flow [2023-08-31 01:39:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:39:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:39:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2777 transitions. [2023-08-31 01:39:11,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-08-31 01:39:11,956 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2777 transitions. [2023-08-31 01:39:11,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2777 transitions. [2023-08-31 01:39:11,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:11,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2777 transitions. [2023-08-31 01:39:11,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 173.5625) internal successors, (2777), 16 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 01:39:11,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states 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 01:39:11,960 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states 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 01:39:11,960 INFO L175 Difference]: Start difference. First operand has 334 places, 449 transitions, 10940 flow. Second operand 16 states and 2777 transitions. [2023-08-31 01:39:11,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 487 transitions, 12329 flow [2023-08-31 01:39:12,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 487 transitions, 11966 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-08-31 01:39:12,429 INFO L231 Difference]: Finished difference. Result has 336 places, 445 transitions, 10801 flow [2023-08-31 01:39:12,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10801, PETRI_PLACES=336, PETRI_TRANSITIONS=445} [2023-08-31 01:39:12,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-08-31 01:39:12,430 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 445 transitions, 10801 flow [2023-08-31 01:39:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states 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 01:39:12,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:12,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:12,435 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 01:39:12,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:12,633 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 01:39:12,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1081948156, now seen corresponding path program 31 times [2023-08-31 01:39:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271934302] [2023-08-31 01:39:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271934302] [2023-08-31 01:39:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271934302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307102684] [2023-08-31 01:39:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:39:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:13,312 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 01:39:13,335 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 01:39:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:13,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307102684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:13,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 01:39:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190230160] [2023-08-31 01:39:13,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:39:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:39:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:39:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:14,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 445 transitions, 10801 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states 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 01:39:14,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:14,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:14,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:14,977 INFO L130 PetriNetUnfolder]: 1351/2773 cut-off events. [2023-08-31 01:39:14,977 INFO L131 PetriNetUnfolder]: For 111219/111221 co-relation queries the response was YES. [2023-08-31 01:39:14,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29422 conditions, 2773 events. 1351/2773 cut-off events. For 111219/111221 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20272 event pairs, 91 based on Foata normal form. 5/2773 useless extension candidates. Maximal degree in co-relation 29309. Up to 2167 conditions per place. [2023-08-31 01:39:15,010 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 455 selfloop transitions, 105 changer transitions 15/585 dead transitions. [2023-08-31 01:39:15,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 585 transitions, 14581 flow [2023-08-31 01:39:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1851 transitions. [2023-08-31 01:39:15,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084289496910856 [2023-08-31 01:39:15,013 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1851 transitions. [2023-08-31 01:39:15,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1851 transitions. [2023-08-31 01:39:15,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:15,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1851 transitions. [2023-08-31 01:39:15,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.27272727272728) internal successors, (1851), 11 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states 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 01:39:15,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:15,018 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:15,018 INFO L175 Difference]: Start difference. First operand has 336 places, 445 transitions, 10801 flow. Second operand 11 states and 1851 transitions. [2023-08-31 01:39:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 585 transitions, 14581 flow [2023-08-31 01:39:15,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 585 transitions, 14247 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-31 01:39:15,540 INFO L231 Difference]: Finished difference. Result has 338 places, 507 transitions, 12541 flow [2023-08-31 01:39:15,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12541, PETRI_PLACES=338, PETRI_TRANSITIONS=507} [2023-08-31 01:39:15,541 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-08-31 01:39:15,541 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 507 transitions, 12541 flow [2023-08-31 01:39:15,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states 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 01:39:15,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:15,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:15,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:15,748 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 01:39:15,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1129985218, now seen corresponding path program 32 times [2023-08-31 01:39:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:15,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264279665] [2023-08-31 01:39:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:15,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:16,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264279665] [2023-08-31 01:39:16,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264279665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191112082] [2023-08-31 01:39:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:16,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:16,133 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 01:39:16,136 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 01:39:16,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:16,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:16,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:16,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191112082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:16,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:16,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 01:39:16,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677112838] [2023-08-31 01:39:16,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:16,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:39:16,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:39:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:39:16,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:16,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 507 transitions, 12541 flow. Second operand has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 01:39:16,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:16,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:17,888 INFO L130 PetriNetUnfolder]: 1355/2761 cut-off events. [2023-08-31 01:39:17,888 INFO L131 PetriNetUnfolder]: For 115617/115619 co-relation queries the response was YES. [2023-08-31 01:39:17,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 2761 events. 1355/2761 cut-off events. For 115617/115619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 19967 event pairs, 103 based on Foata normal form. 7/2763 useless extension candidates. Maximal degree in co-relation 30361. Up to 2380 conditions per place. [2023-08-31 01:39:17,921 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 456 selfloop transitions, 79 changer transitions 17/562 dead transitions. [2023-08-31 01:39:17,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 562 transitions, 14236 flow [2023-08-31 01:39:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 01:39:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 01:39:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2004 transitions. [2023-08-31 01:39:17,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-08-31 01:39:17,924 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2004 transitions. [2023-08-31 01:39:17,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2004 transitions. [2023-08-31 01:39:17,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:17,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2004 transitions. [2023-08-31 01:39:17,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.0) internal successors, (2004), 12 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states 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 01:39:17,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states 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 01:39:17,930 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states 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 01:39:17,930 INFO L175 Difference]: Start difference. First operand has 338 places, 507 transitions, 12541 flow. Second operand 12 states and 2004 transitions. [2023-08-31 01:39:17,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 562 transitions, 14236 flow [2023-08-31 01:39:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 562 transitions, 13816 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-08-31 01:39:18,668 INFO L231 Difference]: Finished difference. Result has 348 places, 513 transitions, 12589 flow [2023-08-31 01:39:18,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12177, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12589, PETRI_PLACES=348, PETRI_TRANSITIONS=513} [2023-08-31 01:39:18,669 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-08-31 01:39:18,669 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 513 transitions, 12589 flow [2023-08-31 01:39:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 01:39:18,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:18,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:18,674 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 01:39:18,870 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,SelfDestructingSolverStorable42 [2023-08-31 01:39:18,870 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 01:39:18,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1044264796, now seen corresponding path program 33 times [2023-08-31 01:39:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379388719] [2023-08-31 01:39:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:19,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379388719] [2023-08-31 01:39:19,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379388719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:19,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075541775] [2023-08-31 01:39:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:39:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:19,295 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 01:39:19,296 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 01:39:19,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:39:19,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:19,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:19,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075541775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:19,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:19,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 01:39:19,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307357678] [2023-08-31 01:39:19,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:19,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:39:19,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:39:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:39:20,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:20,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 513 transitions, 12589 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 01:39:20,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:20,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:20,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:21,013 INFO L130 PetriNetUnfolder]: 1324/2676 cut-off events. [2023-08-31 01:39:21,013 INFO L131 PetriNetUnfolder]: For 105638/105640 co-relation queries the response was YES. [2023-08-31 01:39:21,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 2676 events. 1324/2676 cut-off events. For 105638/105640 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19077 event pairs, 90 based on Foata normal form. 3/2674 useless extension candidates. Maximal degree in co-relation 28988. Up to 2174 conditions per place. [2023-08-31 01:39:21,049 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 446 selfloop transitions, 102 changer transitions 5/563 dead transitions. [2023-08-31 01:39:21,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 563 transitions, 14228 flow [2023-08-31 01:39:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:39:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:39:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1516 transitions. [2023-08-31 01:39:21,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40884573894282633 [2023-08-31 01:39:21,051 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1516 transitions. [2023-08-31 01:39:21,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1516 transitions. [2023-08-31 01:39:21,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:21,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1516 transitions. [2023-08-31 01:39:21,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.44444444444446) internal successors, (1516), 9 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 01:39:21,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:21,056 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:21,056 INFO L175 Difference]: Start difference. First operand has 348 places, 513 transitions, 12589 flow. Second operand 9 states and 1516 transitions. [2023-08-31 01:39:21,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 563 transitions, 14228 flow [2023-08-31 01:39:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 563 transitions, 13823 flow, removed 147 selfloop flow, removed 6 redundant places. [2023-08-31 01:39:21,748 INFO L231 Difference]: Finished difference. Result has 349 places, 515 transitions, 12553 flow [2023-08-31 01:39:21,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12553, PETRI_PLACES=349, PETRI_TRANSITIONS=515} [2023-08-31 01:39:21,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-08-31 01:39:21,748 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 515 transitions, 12553 flow [2023-08-31 01:39:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 01:39:21,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:21,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:21,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-31 01:39:21,949 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,SelfDestructingSolverStorable43 [2023-08-31 01:39:21,950 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 01:39:21,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash -392624, now seen corresponding path program 34 times [2023-08-31 01:39:21,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:21,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756388943] [2023-08-31 01:39:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756388943] [2023-08-31 01:39:22,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756388943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:22,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822212163] [2023-08-31 01:39:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:39:22,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:22,280 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 01:39:22,282 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 01:39:22,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:39:22,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:22,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822212163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:22,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:22,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 01:39:22,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673758478] [2023-08-31 01:39:22,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:22,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:39:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:39:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:39:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:23,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 515 transitions, 12553 flow. Second operand has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states 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 01:39:23,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:23,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:23,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:23,954 INFO L130 PetriNetUnfolder]: 1315/2649 cut-off events. [2023-08-31 01:39:23,954 INFO L131 PetriNetUnfolder]: For 106535/106537 co-relation queries the response was YES. [2023-08-31 01:39:23,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28554 conditions, 2649 events. 1315/2649 cut-off events. For 106535/106537 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18800 event pairs, 89 based on Foata normal form. 3/2647 useless extension candidates. Maximal degree in co-relation 28430. Up to 2246 conditions per place. [2023-08-31 01:39:23,987 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 454 selfloop transitions, 95 changer transitions 5/564 dead transitions. [2023-08-31 01:39:23,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 564 transitions, 14059 flow [2023-08-31 01:39:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1841 transitions. [2023-08-31 01:39:23,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40622241835834066 [2023-08-31 01:39:23,990 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1841 transitions. [2023-08-31 01:39:23,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1841 transitions. [2023-08-31 01:39:23,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:23,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1841 transitions. [2023-08-31 01:39:23,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.36363636363637) internal successors, (1841), 11 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states 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 01:39:23,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:23,994 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:23,995 INFO L175 Difference]: Start difference. First operand has 349 places, 515 transitions, 12553 flow. Second operand 11 states and 1841 transitions. [2023-08-31 01:39:23,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 564 transitions, 14059 flow [2023-08-31 01:39:24,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 564 transitions, 13815 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-08-31 01:39:24,643 INFO L231 Difference]: Finished difference. Result has 354 places, 521 transitions, 12684 flow [2023-08-31 01:39:24,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12315, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12684, PETRI_PLACES=354, PETRI_TRANSITIONS=521} [2023-08-31 01:39:24,644 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-08-31 01:39:24,644 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 521 transitions, 12684 flow [2023-08-31 01:39:24,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states 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 01:39:24,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:24,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:24,650 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 01:39:24,849 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,SelfDestructingSolverStorable44 [2023-08-31 01:39:24,849 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 01:39:24,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2125930154, now seen corresponding path program 35 times [2023-08-31 01:39:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805417468] [2023-08-31 01:39:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:25,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805417468] [2023-08-31 01:39:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805417468] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991779822] [2023-08-31 01:39:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:39:25,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:25,220 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 01:39:25,222 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 01:39:25,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:39:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:25,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991779822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:25,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-31 01:39:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486003344] [2023-08-31 01:39:25,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:25,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:39:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:39:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:39:25,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:25,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 521 transitions, 12684 flow. Second operand has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states 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 01:39:25,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:25,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:25,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:26,760 INFO L130 PetriNetUnfolder]: 1394/2843 cut-off events. [2023-08-31 01:39:26,761 INFO L131 PetriNetUnfolder]: For 115875/115877 co-relation queries the response was YES. [2023-08-31 01:39:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30514 conditions, 2843 events. 1394/2843 cut-off events. For 115875/115877 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20650 event pairs, 110 based on Foata normal form. 4/2842 useless extension candidates. Maximal degree in co-relation 30389. Up to 2509 conditions per place. [2023-08-31 01:39:26,793 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 488 selfloop transitions, 90 changer transitions 6/594 dead transitions. [2023-08-31 01:39:26,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 594 transitions, 15081 flow [2023-08-31 01:39:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:39:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:39:26,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-31 01:39:26,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-08-31 01:39:26,795 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-31 01:39:26,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-31 01:39:26,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:26,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-31 01:39:26,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 01:39:26,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:26,797 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:26,797 INFO L175 Difference]: Start difference. First operand has 354 places, 521 transitions, 12684 flow. Second operand 8 states and 1344 transitions. [2023-08-31 01:39:26,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 594 transitions, 15081 flow [2023-08-31 01:39:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 594 transitions, 14861 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-31 01:39:27,414 INFO L231 Difference]: Finished difference. Result has 355 places, 556 transitions, 13700 flow [2023-08-31 01:39:27,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12470, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13700, PETRI_PLACES=355, PETRI_TRANSITIONS=556} [2023-08-31 01:39:27,415 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-08-31 01:39:27,415 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 556 transitions, 13700 flow [2023-08-31 01:39:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states 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 01:39:27,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:27,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:27,422 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 01:39:27,616 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,SelfDestructingSolverStorable45 [2023-08-31 01:39:27,616 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 01:39:27,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2021571692, now seen corresponding path program 36 times [2023-08-31 01:39:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:27,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320521364] [2023-08-31 01:39:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:27,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:27,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320521364] [2023-08-31 01:39:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320521364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512759449] [2023-08-31 01:39:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:39:27,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:27,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:27,938 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 01:39:27,940 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 01:39:28,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:39:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:28,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512759449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:28,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:28,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-31 01:39:28,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860340261] [2023-08-31 01:39:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:28,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:39:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:39:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:39:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:28,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 556 transitions, 13700 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states 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 01:39:28,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:28,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:28,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:29,538 INFO L130 PetriNetUnfolder]: 1382/2807 cut-off events. [2023-08-31 01:39:29,538 INFO L131 PetriNetUnfolder]: For 118289/118291 co-relation queries the response was YES. [2023-08-31 01:39:29,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30558 conditions, 2807 events. 1382/2807 cut-off events. For 118289/118291 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 20271 event pairs, 110 based on Foata normal form. 4/2806 useless extension candidates. Maximal degree in co-relation 30431. Up to 2509 conditions per place. [2023-08-31 01:39:29,575 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 489 selfloop transitions, 85 changer transitions 9/593 dead transitions. [2023-08-31 01:39:29,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 593 transitions, 15227 flow [2023-08-31 01:39:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:39:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:39:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-08-31 01:39:29,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-08-31 01:39:29,576 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-08-31 01:39:29,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-08-31 01:39:29,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:29,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-08-31 01:39:29,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 01:39:29,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:29,579 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:29,579 INFO L175 Difference]: Start difference. First operand has 355 places, 556 transitions, 13700 flow. Second operand 8 states and 1344 transitions. [2023-08-31 01:39:29,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 593 transitions, 15227 flow [2023-08-31 01:39:30,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 593 transitions, 14866 flow, removed 131 selfloop flow, removed 4 redundant places. [2023-08-31 01:39:30,336 INFO L231 Difference]: Finished difference. Result has 360 places, 556 transitions, 13593 flow [2023-08-31 01:39:30,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13375, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13593, PETRI_PLACES=360, PETRI_TRANSITIONS=556} [2023-08-31 01:39:30,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-31 01:39:30,337 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 556 transitions, 13593 flow [2023-08-31 01:39:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states 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 01:39:30,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:30,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:30,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:30,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:30,538 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 01:39:30,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -940248734, now seen corresponding path program 37 times [2023-08-31 01:39:30,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:30,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949828662] [2023-08-31 01:39:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949828662] [2023-08-31 01:39:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949828662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859632674] [2023-08-31 01:39:30,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:39:30,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:30,886 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:30,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-31 01:39:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:30,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:31,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:31,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859632674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:31,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:31,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-31 01:39:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190854277] [2023-08-31 01:39:31,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:39:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:39:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:39:31,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:31,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 556 transitions, 13593 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states 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 01:39:31,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:31,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:31,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:32,405 INFO L130 PetriNetUnfolder]: 1376/2773 cut-off events. [2023-08-31 01:39:32,405 INFO L131 PetriNetUnfolder]: For 114040/114042 co-relation queries the response was YES. [2023-08-31 01:39:32,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 2773 events. 1376/2773 cut-off events. For 114040/114042 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19832 event pairs, 116 based on Foata normal form. 4/2772 useless extension candidates. Maximal degree in co-relation 29933. Up to 2558 conditions per place. [2023-08-31 01:39:32,439 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 504 selfloop transitions, 67 changer transitions 7/588 dead transitions. [2023-08-31 01:39:32,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 588 transitions, 15009 flow [2023-08-31 01:39:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:39:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:39:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-08-31 01:39:32,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-08-31 01:39:32,441 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-08-31 01:39:32,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-08-31 01:39:32,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:32,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-08-31 01:39:32,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states 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 01:39:32,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:32,444 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:32,444 INFO L175 Difference]: Start difference. First operand has 360 places, 556 transitions, 13593 flow. Second operand 8 states and 1339 transitions. [2023-08-31 01:39:32,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 588 transitions, 15009 flow [2023-08-31 01:39:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 588 transitions, 14876 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-31 01:39:33,222 INFO L231 Difference]: Finished difference. Result has 365 places, 559 transitions, 13732 flow [2023-08-31 01:39:33,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13732, PETRI_PLACES=365, PETRI_TRANSITIONS=559} [2023-08-31 01:39:33,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2023-08-31 01:39:33,223 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 559 transitions, 13732 flow [2023-08-31 01:39:33,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states 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 01:39:33,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:33,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:33,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-31 01:39:33,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-31 01:39:33,424 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 01:39:33,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1160083242, now seen corresponding path program 38 times [2023-08-31 01:39:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593390703] [2023-08-31 01:39:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593390703] [2023-08-31 01:39:33,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593390703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691000447] [2023-08-31 01:39:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:33,907 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:33,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-31 01:39:34,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:34,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:34,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691000447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:34,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:34,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-08-31 01:39:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379810230] [2023-08-31 01:39:34,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:34,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:39:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:39:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:39:34,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 412 [2023-08-31 01:39:34,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 559 transitions, 13732 flow. Second operand has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:34,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:34,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 412 [2023-08-31 01:39:34,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:35,825 INFO L130 PetriNetUnfolder]: 1481/3017 cut-off events. [2023-08-31 01:39:35,825 INFO L131 PetriNetUnfolder]: For 126145/126147 co-relation queries the response was YES. [2023-08-31 01:39:35,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32741 conditions, 3017 events. 1481/3017 cut-off events. For 126145/126147 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22201 event pairs, 114 based on Foata normal form. 9/3021 useless extension candidates. Maximal degree in co-relation 32610. Up to 2625 conditions per place. [2023-08-31 01:39:35,857 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 542 selfloop transitions, 98 changer transitions 25/675 dead transitions. [2023-08-31 01:39:35,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 675 transitions, 17044 flow [2023-08-31 01:39:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 01:39:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 01:39:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2132 transitions. [2023-08-31 01:39:35,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39805825242718446 [2023-08-31 01:39:35,859 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2132 transitions. [2023-08-31 01:39:35,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2132 transitions. [2023-08-31 01:39:35,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:35,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2132 transitions. [2023-08-31 01:39:35,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.0) internal successors, (2132), 13 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states 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 01:39:35,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:39:35,863 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states 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 01:39:35,863 INFO L175 Difference]: Start difference. First operand has 365 places, 559 transitions, 13732 flow. Second operand 13 states and 2132 transitions. [2023-08-31 01:39:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 675 transitions, 17044 flow [2023-08-31 01:39:36,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 675 transitions, 16773 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-08-31 01:39:36,614 INFO L231 Difference]: Finished difference. Result has 380 places, 613 transitions, 15208 flow [2023-08-31 01:39:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13469, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15208, PETRI_PLACES=380, PETRI_TRANSITIONS=613} [2023-08-31 01:39:36,615 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-08-31 01:39:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 613 transitions, 15208 flow [2023-08-31 01:39:36,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:36,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:36,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:36,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-31 01:39:36,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-31 01:39:36,816 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:36,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1875827202, now seen corresponding path program 39 times [2023-08-31 01:39:36,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:36,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359215876] [2023-08-31 01:39:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:36,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359215876] [2023-08-31 01:39:37,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359215876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330076929] [2023-08-31 01:39:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:39:37,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:37,155 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:37,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-31 01:39:37,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:39:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:37,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:37,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330076929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:37,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:37,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 01:39:37,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760126247] [2023-08-31 01:39:37,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:37,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:39:37,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:37,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:39:37,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:39:37,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:37,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 613 transitions, 15208 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 01:39:37,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:37,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:37,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:39,158 INFO L130 PetriNetUnfolder]: 1572/3187 cut-off events. [2023-08-31 01:39:39,158 INFO L131 PetriNetUnfolder]: For 149767/149769 co-relation queries the response was YES. [2023-08-31 01:39:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 3187 events. 1572/3187 cut-off events. For 149767/149769 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23588 event pairs, 125 based on Foata normal form. 6/3188 useless extension candidates. Maximal degree in co-relation 35490. Up to 2651 conditions per place. [2023-08-31 01:39:39,198 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 560 selfloop transitions, 118 changer transitions 15/703 dead transitions. [2023-08-31 01:39:39,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 703 transitions, 18266 flow [2023-08-31 01:39:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1843 transitions. [2023-08-31 01:39:39,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066637246248897 [2023-08-31 01:39:39,201 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1843 transitions. [2023-08-31 01:39:39,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1843 transitions. [2023-08-31 01:39:39,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:39,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1843 transitions. [2023-08-31 01:39:39,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.54545454545453) internal successors, (1843), 11 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states 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 01:39:39,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:39,206 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:39,206 INFO L175 Difference]: Start difference. First operand has 380 places, 613 transitions, 15208 flow. Second operand 11 states and 1843 transitions. [2023-08-31 01:39:39,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 703 transitions, 18266 flow [2023-08-31 01:39:40,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 703 transitions, 17761 flow, removed 249 selfloop flow, removed 3 redundant places. [2023-08-31 01:39:40,152 INFO L231 Difference]: Finished difference. Result has 391 places, 645 transitions, 16081 flow [2023-08-31 01:39:40,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=14721, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16081, PETRI_PLACES=391, PETRI_TRANSITIONS=645} [2023-08-31 01:39:40,153 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-08-31 01:39:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 645 transitions, 16081 flow [2023-08-31 01:39:40,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states 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 01:39:40,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:40,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:40,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-31 01:39:40,354 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:40,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1336639400, now seen corresponding path program 40 times [2023-08-31 01:39:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589623941] [2023-08-31 01:39:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589623941] [2023-08-31 01:39:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589623941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492787735] [2023-08-31 01:39:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:39:40,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:40,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:40,697 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:40,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-31 01:39:40,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:39:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:40,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:41,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492787735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:41,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:41,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-31 01:39:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445420786] [2023-08-31 01:39:41,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:41,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:39:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:39:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:39:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:41,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 645 transitions, 16081 flow. Second operand has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states 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 01:39:41,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:41,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:42,566 INFO L130 PetriNetUnfolder]: 1610/3255 cut-off events. [2023-08-31 01:39:42,566 INFO L131 PetriNetUnfolder]: For 156258/156260 co-relation queries the response was YES. [2023-08-31 01:39:42,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36511 conditions, 3255 events. 1610/3255 cut-off events. For 156258/156260 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 24094 event pairs, 125 based on Foata normal form. 4/3254 useless extension candidates. Maximal degree in co-relation 36366. Up to 2986 conditions per place. [2023-08-31 01:39:42,607 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 76 changer transitions 6/696 dead transitions. [2023-08-31 01:39:42,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 696 transitions, 18224 flow [2023-08-31 01:39:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:39:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:39:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1503 transitions. [2023-08-31 01:39:42,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-08-31 01:39:42,609 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1503 transitions. [2023-08-31 01:39:42,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1503 transitions. [2023-08-31 01:39:42,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:42,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1503 transitions. [2023-08-31 01:39:42,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 01:39:42,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:42,612 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:42,612 INFO L175 Difference]: Start difference. First operand has 391 places, 645 transitions, 16081 flow. Second operand 9 states and 1503 transitions. [2023-08-31 01:39:42,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 696 transitions, 18224 flow [2023-08-31 01:39:43,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 696 transitions, 17740 flow, removed 197 selfloop flow, removed 6 redundant places. [2023-08-31 01:39:43,575 INFO L231 Difference]: Finished difference. Result has 395 places, 666 transitions, 16436 flow [2023-08-31 01:39:43,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=15609, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16436, PETRI_PLACES=395, PETRI_TRANSITIONS=666} [2023-08-31 01:39:43,576 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-08-31 01:39:43,576 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 666 transitions, 16436 flow [2023-08-31 01:39:43,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states 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 01:39:43,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:43,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:43,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:43,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:43,777 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:43,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263854, now seen corresponding path program 41 times [2023-08-31 01:39:43,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:43,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125654060] [2023-08-31 01:39:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125654060] [2023-08-31 01:39:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125654060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508267084] [2023-08-31 01:39:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:39:44,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:44,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:44,137 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-31 01:39:44,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:39:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:44,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508267084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:44,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:44,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-31 01:39:44,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91089547] [2023-08-31 01:39:44,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:44,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:39:44,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:39:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:39:44,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:44,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 666 transitions, 16436 flow. Second operand has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states 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 01:39:44,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:44,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:44,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:46,125 INFO L130 PetriNetUnfolder]: 1669/3389 cut-off events. [2023-08-31 01:39:46,125 INFO L131 PetriNetUnfolder]: For 146357/146359 co-relation queries the response was YES. [2023-08-31 01:39:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 3389 events. 1669/3389 cut-off events. For 146357/146359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 25388 event pairs, 128 based on Foata normal form. 5/3389 useless extension candidates. Maximal degree in co-relation 36858. Up to 3011 conditions per place. [2023-08-31 01:39:46,174 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 101 changer transitions 7/730 dead transitions. [2023-08-31 01:39:46,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 730 transitions, 18849 flow [2023-08-31 01:39:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 01:39:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 01:39:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1347 transitions. [2023-08-31 01:39:46,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086771844660194 [2023-08-31 01:39:46,178 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1347 transitions. [2023-08-31 01:39:46,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1347 transitions. [2023-08-31 01:39:46,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:46,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1347 transitions. [2023-08-31 01:39:46,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.375) internal successors, (1347), 8 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states 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 01:39:46,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:46,182 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states 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 01:39:46,182 INFO L175 Difference]: Start difference. First operand has 395 places, 666 transitions, 16436 flow. Second operand 8 states and 1347 transitions. [2023-08-31 01:39:46,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 730 transitions, 18849 flow [2023-08-31 01:39:47,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 730 transitions, 18501 flow, removed 125 selfloop flow, removed 5 redundant places. [2023-08-31 01:39:47,275 INFO L231 Difference]: Finished difference. Result has 399 places, 692 transitions, 17072 flow [2023-08-31 01:39:47,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16094, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17072, PETRI_PLACES=399, PETRI_TRANSITIONS=692} [2023-08-31 01:39:47,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-31 01:39:47,276 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 692 transitions, 17072 flow [2023-08-31 01:39:47,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states 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 01:39:47,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:47,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:47,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:47,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:47,481 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:47,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1615598274, now seen corresponding path program 42 times [2023-08-31 01:39:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:47,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589133280] [2023-08-31 01:39:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589133280] [2023-08-31 01:39:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589133280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791501766] [2023-08-31 01:39:47,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:39:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:47,805 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:47,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-31 01:39:47,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:39:47,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:47,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:48,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:48,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791501766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:48,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:48,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-31 01:39:48,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310150293] [2023-08-31 01:39:48,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:48,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:39:48,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:39:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:39:48,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:48,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 692 transitions, 17072 flow. Second operand has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states 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 01:39:48,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:48,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:48,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:49,961 INFO L130 PetriNetUnfolder]: 1664/3354 cut-off events. [2023-08-31 01:39:49,961 INFO L131 PetriNetUnfolder]: For 147446/147448 co-relation queries the response was YES. [2023-08-31 01:39:49,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3354 events. 1664/3354 cut-off events. For 147446/147448 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 24919 event pairs, 125 based on Foata normal form. 5/3354 useless extension candidates. Maximal degree in co-relation 36573. Up to 3011 conditions per place. [2023-08-31 01:39:50,009 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 610 selfloop transitions, 98 changer transitions 8/726 dead transitions. [2023-08-31 01:39:50,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 726 transitions, 18740 flow [2023-08-31 01:39:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:39:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:39:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1508 transitions. [2023-08-31 01:39:50,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40668824163969797 [2023-08-31 01:39:50,011 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1508 transitions. [2023-08-31 01:39:50,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1508 transitions. [2023-08-31 01:39:50,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:50,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1508 transitions. [2023-08-31 01:39:50,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.55555555555554) internal successors, (1508), 9 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states 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 01:39:50,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:50,014 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:50,014 INFO L175 Difference]: Start difference. First operand has 399 places, 692 transitions, 17072 flow. Second operand 9 states and 1508 transitions. [2023-08-31 01:39:50,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 726 transitions, 18740 flow [2023-08-31 01:39:51,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 726 transitions, 18462 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-08-31 01:39:51,134 INFO L231 Difference]: Finished difference. Result has 403 places, 692 transitions, 17068 flow [2023-08-31 01:39:51,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16798, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17068, PETRI_PLACES=403, PETRI_TRANSITIONS=692} [2023-08-31 01:39:51,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-31 01:39:51,135 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 692 transitions, 17068 flow [2023-08-31 01:39:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states 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 01:39:51,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:51,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:51,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:51,336 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:51,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash -210237672, now seen corresponding path program 43 times [2023-08-31 01:39:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:51,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609475372] [2023-08-31 01:39:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609475372] [2023-08-31 01:39:51,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609475372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:51,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982851928] [2023-08-31 01:39:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:39:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:51,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:51,617 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-31 01:39:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:51,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:51,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982851928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:52,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:52,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 01:39:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592366287] [2023-08-31 01:39:52,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:52,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:39:52,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:52,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:39:52,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:39:52,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:52,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 692 transitions, 17068 flow. Second operand has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 01:39:52,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:52,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:52,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:53,505 INFO L130 PetriNetUnfolder]: 1648/3305 cut-off events. [2023-08-31 01:39:53,505 INFO L131 PetriNetUnfolder]: For 144278/144280 co-relation queries the response was YES. [2023-08-31 01:39:53,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 3305 events. 1648/3305 cut-off events. For 144278/144280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24310 event pairs, 127 based on Foata normal form. 4/3304 useless extension candidates. Maximal degree in co-relation 36167. Up to 2910 conditions per place. [2023-08-31 01:39:53,554 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 116 changer transitions 5/743 dead transitions. [2023-08-31 01:39:53,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 743 transitions, 19087 flow [2023-08-31 01:39:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1840 transitions. [2023-08-31 01:39:53,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060017652250662 [2023-08-31 01:39:53,556 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1840 transitions. [2023-08-31 01:39:53,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1840 transitions. [2023-08-31 01:39:53,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:53,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1840 transitions. [2023-08-31 01:39:53,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.27272727272728) internal successors, (1840), 11 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 01:39:53,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:53,559 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states 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 01:39:53,559 INFO L175 Difference]: Start difference. First operand has 403 places, 692 transitions, 17068 flow. Second operand 11 states and 1840 transitions. [2023-08-31 01:39:53,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 743 transitions, 19087 flow [2023-08-31 01:39:54,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 743 transitions, 18935 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-31 01:39:54,659 INFO L231 Difference]: Finished difference. Result has 410 places, 702 transitions, 17441 flow [2023-08-31 01:39:54,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17441, PETRI_PLACES=410, PETRI_TRANSITIONS=702} [2023-08-31 01:39:54,661 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2023-08-31 01:39:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 702 transitions, 17441 flow [2023-08-31 01:39:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 01:39:54,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:54,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:54,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:54,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-31 01:39:54,877 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:54,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 639122522, now seen corresponding path program 44 times [2023-08-31 01:39:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297850265] [2023-08-31 01:39:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:55,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297850265] [2023-08-31 01:39:55,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297850265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015948532] [2023-08-31 01:39:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:55,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:55,182 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:55,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-31 01:39:55,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:55,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-31 01:39:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:55,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015948532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:55,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 01:39:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071901987] [2023-08-31 01:39:55,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:39:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:39:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:39:55,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-08-31 01:39:55,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 702 transitions, 17441 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states 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 01:39:55,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:55,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-08-31 01:39:55,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:57,071 INFO L130 PetriNetUnfolder]: 1644/3278 cut-off events. [2023-08-31 01:39:57,071 INFO L131 PetriNetUnfolder]: For 145082/145084 co-relation queries the response was YES. [2023-08-31 01:39:57,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 3278 events. 1644/3278 cut-off events. For 145082/145084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23893 event pairs, 134 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 36185. Up to 2831 conditions per place. [2023-08-31 01:39:57,117 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 119 changer transitions 5/738 dead transitions. [2023-08-31 01:39:57,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 738 transitions, 19267 flow [2023-08-31 01:39:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:39:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:39:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1511 transitions. [2023-08-31 01:39:57,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40749730312837107 [2023-08-31 01:39:57,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1511 transitions. [2023-08-31 01:39:57,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1511 transitions. [2023-08-31 01:39:57,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:57,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1511 transitions. [2023-08-31 01:39:57,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.88888888888889) internal successors, (1511), 9 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states 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 01:39:57,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:57,121 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:39:57,121 INFO L175 Difference]: Start difference. First operand has 410 places, 702 transitions, 17441 flow. Second operand 9 states and 1511 transitions. [2023-08-31 01:39:57,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 738 transitions, 19267 flow [2023-08-31 01:39:58,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 738 transitions, 18983 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-08-31 01:39:58,179 INFO L231 Difference]: Finished difference. Result has 412 places, 704 transitions, 17544 flow [2023-08-31 01:39:58,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17163, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17544, PETRI_PLACES=412, PETRI_TRANSITIONS=704} [2023-08-31 01:39:58,180 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-31 01:39:58,180 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 704 transitions, 17544 flow [2023-08-31 01:39:58,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states 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 01:39:58,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:58,181 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:58,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-31 01:39:58,385 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:58,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 708283217, now seen corresponding path program 45 times [2023-08-31 01:39:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:58,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124272747] [2023-08-31 01:39:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124272747] [2023-08-31 01:39:58,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124272747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739138617] [2023-08-31 01:39:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:39:58,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:58,451 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:58,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-31 01:39:58,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:39:58,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:39:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739138617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:58,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:58,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-31 01:39:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927930833] [2023-08-31 01:39:58,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:39:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:39:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:39:58,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:39:58,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 704 transitions, 17544 flow. Second operand has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states 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 01:39:58,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:58,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:39:58,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:00,239 INFO L130 PetriNetUnfolder]: 2101/4250 cut-off events. [2023-08-31 01:40:00,239 INFO L131 PetriNetUnfolder]: For 196854/196854 co-relation queries the response was YES. [2023-08-31 01:40:00,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46884 conditions, 4250 events. 2101/4250 cut-off events. For 196854/196854 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32675 event pairs, 313 based on Foata normal form. 4/4254 useless extension candidates. Maximal degree in co-relation 46731. Up to 1463 conditions per place. [2023-08-31 01:40:00,294 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 549 selfloop transitions, 384 changer transitions 15/948 dead transitions. [2023-08-31 01:40:00,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 948 transitions, 25213 flow [2023-08-31 01:40:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:40:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:40:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2441 transitions. [2023-08-31 01:40:00,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319694868238555 [2023-08-31 01:40:00,296 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2441 transitions. [2023-08-31 01:40:00,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2441 transitions. [2023-08-31 01:40:00,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:00,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2441 transitions. [2023-08-31 01:40:00,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.35714285714286) internal successors, (2441), 14 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states 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 01:40:00,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:40:00,302 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:40:00,302 INFO L175 Difference]: Start difference. First operand has 412 places, 704 transitions, 17544 flow. Second operand 14 states and 2441 transitions. [2023-08-31 01:40:00,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 948 transitions, 25213 flow [2023-08-31 01:40:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 948 transitions, 24802 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-08-31 01:40:01,805 INFO L231 Difference]: Finished difference. Result has 424 places, 845 transitions, 22362 flow [2023-08-31 01:40:01,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17262, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22362, PETRI_PLACES=424, PETRI_TRANSITIONS=845} [2023-08-31 01:40:01,806 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-08-31 01:40:01,806 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 845 transitions, 22362 flow [2023-08-31 01:40:01,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states 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 01:40:01,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:01,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:01,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-31 01:40:02,009 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:02,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1132772869, now seen corresponding path program 46 times [2023-08-31 01:40:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288690443] [2023-08-31 01:40:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288690443] [2023-08-31 01:40:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288690443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085858786] [2023-08-31 01:40:02,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:40:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:02,078 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:02,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-31 01:40:02,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:40:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085858786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:02,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:02,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-31 01:40:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822584284] [2023-08-31 01:40:02,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:40:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:40:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:40:02,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:02,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 845 transitions, 22362 flow. Second operand has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states 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 01:40:02,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:02,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:02,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:04,103 INFO L130 PetriNetUnfolder]: 2208/4437 cut-off events. [2023-08-31 01:40:04,103 INFO L131 PetriNetUnfolder]: For 223350/223350 co-relation queries the response was YES. [2023-08-31 01:40:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50770 conditions, 4437 events. 2208/4437 cut-off events. For 223350/223350 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34327 event pairs, 212 based on Foata normal form. 36/4473 useless extension candidates. Maximal degree in co-relation 50612. Up to 2556 conditions per place. [2023-08-31 01:40:04,172 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 707 selfloop transitions, 265 changer transitions 0/972 dead transitions. [2023-08-31 01:40:04,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 972 transitions, 27055 flow [2023-08-31 01:40:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:40:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:40:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1587 transitions. [2023-08-31 01:40:04,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279935275080906 [2023-08-31 01:40:04,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1587 transitions. [2023-08-31 01:40:04,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1587 transitions. [2023-08-31 01:40:04,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:04,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1587 transitions. [2023-08-31 01:40:04,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states 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 01:40:04,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:40:04,176 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:40:04,176 INFO L175 Difference]: Start difference. First operand has 424 places, 845 transitions, 22362 flow. Second operand 9 states and 1587 transitions. [2023-08-31 01:40:04,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 972 transitions, 27055 flow [2023-08-31 01:40:06,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 972 transitions, 26120 flow, removed 283 selfloop flow, removed 9 redundant places. [2023-08-31 01:40:06,213 INFO L231 Difference]: Finished difference. Result has 424 places, 877 transitions, 23083 flow [2023-08-31 01:40:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=21430, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23083, PETRI_PLACES=424, PETRI_TRANSITIONS=877} [2023-08-31 01:40:06,214 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-08-31 01:40:06,214 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 877 transitions, 23083 flow [2023-08-31 01:40:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states 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 01:40:06,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:06,215 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:06,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-31 01:40:06,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-31 01:40:06,415 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:06,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:06,416 INFO L85 PathProgramCache]: Analyzing trace with hash 991055867, now seen corresponding path program 47 times [2023-08-31 01:40:06,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:06,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809185962] [2023-08-31 01:40:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809185962] [2023-08-31 01:40:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809185962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587649293] [2023-08-31 01:40:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:40:06,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:06,507 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:06,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-31 01:40:06,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 01:40:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:06,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:06,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587649293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:06,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 01:40:06,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377437553] [2023-08-31 01:40:06,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:06,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:06,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:06,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:06,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 877 transitions, 23083 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 01:40:06,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:06,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:09,207 INFO L130 PetriNetUnfolder]: 2459/4964 cut-off events. [2023-08-31 01:40:09,207 INFO L131 PetriNetUnfolder]: For 250906/250906 co-relation queries the response was YES. [2023-08-31 01:40:09,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57350 conditions, 4964 events. 2459/4964 cut-off events. For 250906/250906 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39471 event pairs, 182 based on Foata normal form. 62/5026 useless extension candidates. Maximal degree in co-relation 57192. Up to 3348 conditions per place. [2023-08-31 01:40:09,273 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 746 selfloop transitions, 307 changer transitions 0/1053 dead transitions. [2023-08-31 01:40:09,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1053 transitions, 29281 flow [2023-08-31 01:40:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:40:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:40:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3863 transitions. [2023-08-31 01:40:09,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42619152691968226 [2023-08-31 01:40:09,276 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3863 transitions. [2023-08-31 01:40:09,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3863 transitions. [2023-08-31 01:40:09,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:09,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3863 transitions. [2023-08-31 01:40:09,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 175.5909090909091) internal successors, (3863), 22 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states 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 01:40:09,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:40:09,282 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:40:09,282 INFO L175 Difference]: Start difference. First operand has 424 places, 877 transitions, 23083 flow. Second operand 22 states and 3863 transitions. [2023-08-31 01:40:09,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1053 transitions, 29281 flow [2023-08-31 01:40:11,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1053 transitions, 28712 flow, removed 118 selfloop flow, removed 4 redundant places. [2023-08-31 01:40:11,254 INFO L231 Difference]: Finished difference. Result has 450 places, 951 transitions, 25904 flow [2023-08-31 01:40:11,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=22617, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25904, PETRI_PLACES=450, PETRI_TRANSITIONS=951} [2023-08-31 01:40:11,255 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2023-08-31 01:40:11,255 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 951 transitions, 25904 flow [2023-08-31 01:40:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 01:40:11,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:11,256 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:11,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-08-31 01:40:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-31 01:40:11,456 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:11,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2067368727, now seen corresponding path program 48 times [2023-08-31 01:40:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330516176] [2023-08-31 01:40:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:11,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330516176] [2023-08-31 01:40:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330516176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353415583] [2023-08-31 01:40:11,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:40:11,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:11,521 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:11,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-31 01:40:11,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 01:40:11,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:11,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:11,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353415583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:11,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:11,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 01:40:11,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395752531] [2023-08-31 01:40:11,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:11,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:40:11,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:40:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:40:11,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:11,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 951 transitions, 25904 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:40:11,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:11,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:11,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:14,003 INFO L130 PetriNetUnfolder]: 2467/5022 cut-off events. [2023-08-31 01:40:14,003 INFO L131 PetriNetUnfolder]: For 269687/269687 co-relation queries the response was YES. [2023-08-31 01:40:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59757 conditions, 5022 events. 2467/5022 cut-off events. For 269687/269687 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40318 event pairs, 391 based on Foata normal form. 24/5046 useless extension candidates. Maximal degree in co-relation 59590. Up to 2025 conditions per place. [2023-08-31 01:40:14,081 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 635 selfloop transitions, 451 changer transitions 12/1098 dead transitions. [2023-08-31 01:40:14,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1098 transitions, 30772 flow [2023-08-31 01:40:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:40:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:40:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4525 transitions. [2023-08-31 01:40:14,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224234503360717 [2023-08-31 01:40:14,084 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4525 transitions. [2023-08-31 01:40:14,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4525 transitions. [2023-08-31 01:40:14,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:14,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4525 transitions. [2023-08-31 01:40:14,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 174.03846153846155) internal successors, (4525), 26 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states 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 01:40:14,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:40:14,093 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:40:14,094 INFO L175 Difference]: Start difference. First operand has 450 places, 951 transitions, 25904 flow. Second operand 26 states and 4525 transitions. [2023-08-31 01:40:14,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1098 transitions, 30772 flow [2023-08-31 01:40:16,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1098 transitions, 29728 flow, removed 403 selfloop flow, removed 10 redundant places. [2023-08-31 01:40:16,641 INFO L231 Difference]: Finished difference. Result has 470 places, 964 transitions, 26544 flow [2023-08-31 01:40:16,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=24911, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26544, PETRI_PLACES=470, PETRI_TRANSITIONS=964} [2023-08-31 01:40:16,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 450 predicate places. [2023-08-31 01:40:16,642 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 964 transitions, 26544 flow [2023-08-31 01:40:16,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:40:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:16,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-31 01:40:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-31 01:40:16,843 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:16,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1532439073, now seen corresponding path program 49 times [2023-08-31 01:40:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780699751] [2023-08-31 01:40:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780699751] [2023-08-31 01:40:16,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780699751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71994105] [2023-08-31 01:40:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:40:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:16,910 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:16,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-31 01:40:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:17,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:17,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71994105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:17,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 01:40:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383544772] [2023-08-31 01:40:17,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:17,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:17,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:17,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:17,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 964 transitions, 26544 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:40:17,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:17,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:19,903 INFO L130 PetriNetUnfolder]: 2712/5497 cut-off events. [2023-08-31 01:40:19,903 INFO L131 PetriNetUnfolder]: For 320330/320330 co-relation queries the response was YES. [2023-08-31 01:40:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 5497 events. 2712/5497 cut-off events. For 320330/320330 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44732 event pairs, 338 based on Foata normal form. 44/5541 useless extension candidates. Maximal degree in co-relation 66674. Up to 1774 conditions per place. [2023-08-31 01:40:20,001 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 653 selfloop transitions, 534 changer transitions 11/1198 dead transitions. [2023-08-31 01:40:20,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1198 transitions, 34181 flow [2023-08-31 01:40:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 01:40:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 01:40:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4707 transitions. [2023-08-31 01:40:20,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-08-31 01:40:20,010 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4707 transitions. [2023-08-31 01:40:20,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4707 transitions. [2023-08-31 01:40:20,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:20,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4707 transitions. [2023-08-31 01:40:20,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 174.33333333333334) internal successors, (4707), 27 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states 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 01:40:20,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states 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 01:40:20,024 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states 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 01:40:20,024 INFO L175 Difference]: Start difference. First operand has 470 places, 964 transitions, 26544 flow. Second operand 27 states and 4707 transitions. [2023-08-31 01:40:20,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1198 transitions, 34181 flow [2023-08-31 01:40:22,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1198 transitions, 33264 flow, removed 132 selfloop flow, removed 14 redundant places. [2023-08-31 01:40:22,833 INFO L231 Difference]: Finished difference. Result has 485 places, 1027 transitions, 29279 flow [2023-08-31 01:40:22,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=25364, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29279, PETRI_PLACES=485, PETRI_TRANSITIONS=1027} [2023-08-31 01:40:22,834 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 465 predicate places. [2023-08-31 01:40:22,834 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1027 transitions, 29279 flow [2023-08-31 01:40:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:40:22,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:22,835 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:22,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:23,036 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:23,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 141695673, now seen corresponding path program 50 times [2023-08-31 01:40:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:23,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727879555] [2023-08-31 01:40:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:23,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727879555] [2023-08-31 01:40:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727879555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:23,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585326146] [2023-08-31 01:40:23,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:40:23,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:23,101 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:23,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-31 01:40:23,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:40:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:23,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585326146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:23,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 01:40:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007368177] [2023-08-31 01:40:23,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:23,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:23,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1027 transitions, 29279 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 01:40:23,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:23,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:23,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:25,946 INFO L130 PetriNetUnfolder]: 2655/5348 cut-off events. [2023-08-31 01:40:25,946 INFO L131 PetriNetUnfolder]: For 315845/315845 co-relation queries the response was YES. [2023-08-31 01:40:26,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65883 conditions, 5348 events. 2655/5348 cut-off events. For 315845/315845 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43038 event pairs, 66 based on Foata normal form. 20/5368 useless extension candidates. Maximal degree in co-relation 65710. Up to 1475 conditions per place. [2023-08-31 01:40:26,036 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 632 selfloop transitions, 495 changer transitions 5/1132 dead transitions. [2023-08-31 01:40:26,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1132 transitions, 33907 flow [2023-08-31 01:40:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 01:40:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 01:40:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4869 transitions. [2023-08-31 01:40:26,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207004160887657 [2023-08-31 01:40:26,041 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4869 transitions. [2023-08-31 01:40:26,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4869 transitions. [2023-08-31 01:40:26,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:26,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4869 transitions. [2023-08-31 01:40:26,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 173.89285714285714) internal successors, (4869), 28 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states 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 01:40:26,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states 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 01:40:26,053 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states 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 01:40:26,053 INFO L175 Difference]: Start difference. First operand has 485 places, 1027 transitions, 29279 flow. Second operand 28 states and 4869 transitions. [2023-08-31 01:40:26,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1132 transitions, 33907 flow [2023-08-31 01:40:29,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1132 transitions, 32686 flow, removed 397 selfloop flow, removed 15 redundant places. [2023-08-31 01:40:29,146 INFO L231 Difference]: Finished difference. Result has 499 places, 1044 transitions, 30195 flow [2023-08-31 01:40:29,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=27851, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30195, PETRI_PLACES=499, PETRI_TRANSITIONS=1044} [2023-08-31 01:40:29,147 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 479 predicate places. [2023-08-31 01:40:29,147 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1044 transitions, 30195 flow [2023-08-31 01:40:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 01:40:29,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:29,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:29,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-31 01:40:29,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:29,348 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:29,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:29,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1528904067, now seen corresponding path program 51 times [2023-08-31 01:40:29,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:29,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268450574] [2023-08-31 01:40:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:29,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:29,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268450574] [2023-08-31 01:40:29,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268450574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408702066] [2023-08-31 01:40:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:40:29,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:29,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:29,429 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:29,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-31 01:40:29,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:40:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:29,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:29,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408702066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:29,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:29,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 01:40:29,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569275864] [2023-08-31 01:40:29,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:29,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:29,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:29,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:29,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1044 transitions, 30195 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states 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 01:40:29,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:29,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:32,800 INFO L130 PetriNetUnfolder]: 2961/5996 cut-off events. [2023-08-31 01:40:32,800 INFO L131 PetriNetUnfolder]: For 380651/380651 co-relation queries the response was YES. [2023-08-31 01:40:32,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75386 conditions, 5996 events. 2961/5996 cut-off events. For 380651/380651 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49302 event pairs, 550 based on Foata normal form. 36/6032 useless extension candidates. Maximal degree in co-relation 75210. Up to 2610 conditions per place. [2023-08-31 01:40:32,891 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 793 selfloop transitions, 491 changer transitions 1/1285 dead transitions. [2023-08-31 01:40:32,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1285 transitions, 39499 flow [2023-08-31 01:40:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:40:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:40:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3849 transitions. [2023-08-31 01:40:32,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246469549867608 [2023-08-31 01:40:32,894 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3849 transitions. [2023-08-31 01:40:32,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3849 transitions. [2023-08-31 01:40:32,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:32,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3849 transitions. [2023-08-31 01:40:32,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.95454545454547) internal successors, (3849), 22 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states 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 01:40:32,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:40:32,900 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:40:32,900 INFO L175 Difference]: Start difference. First operand has 499 places, 1044 transitions, 30195 flow. Second operand 22 states and 3849 transitions. [2023-08-31 01:40:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1285 transitions, 39499 flow [2023-08-31 01:40:36,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1285 transitions, 37168 flow, removed 750 selfloop flow, removed 13 redundant places. [2023-08-31 01:40:36,113 INFO L231 Difference]: Finished difference. Result has 513 places, 1128 transitions, 32628 flow [2023-08-31 01:40:36,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=28071, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=32628, PETRI_PLACES=513, PETRI_TRANSITIONS=1128} [2023-08-31 01:40:36,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2023-08-31 01:40:36,115 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1128 transitions, 32628 flow [2023-08-31 01:40:36,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states 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 01:40:36,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:36,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:36,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:36,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:36,322 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:36,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1593843127, now seen corresponding path program 52 times [2023-08-31 01:40:36,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:36,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425809846] [2023-08-31 01:40:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:36,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:36,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:36,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425809846] [2023-08-31 01:40:36,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425809846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:36,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462100198] [2023-08-31 01:40:36,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:40:36,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:36,384 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:36,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-31 01:40:36,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:40:36,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:36,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462100198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:36,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:36,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 01:40:36,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468899579] [2023-08-31 01:40:36,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:36,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:36,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:36,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:36,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1128 transitions, 32628 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:40:36,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:36,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:36,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:39,692 INFO L130 PetriNetUnfolder]: 2885/5874 cut-off events. [2023-08-31 01:40:39,693 INFO L131 PetriNetUnfolder]: For 355261/355261 co-relation queries the response was YES. [2023-08-31 01:40:39,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73058 conditions, 5874 events. 2885/5874 cut-off events. For 355261/355261 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48233 event pairs, 326 based on Foata normal form. 64/5938 useless extension candidates. Maximal degree in co-relation 72878. Up to 1686 conditions per place. [2023-08-31 01:40:39,796 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 680 selfloop transitions, 604 changer transitions 12/1296 dead transitions. [2023-08-31 01:40:39,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1296 transitions, 38795 flow [2023-08-31 01:40:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:40:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:40:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5396 transitions. [2023-08-31 01:40:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248668963357344 [2023-08-31 01:40:39,799 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5396 transitions. [2023-08-31 01:40:39,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5396 transitions. [2023-08-31 01:40:39,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:39,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5396 transitions. [2023-08-31 01:40:39,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 174.06451612903226) internal successors, (5396), 31 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states 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 01:40:39,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:40:39,807 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:40:39,808 INFO L175 Difference]: Start difference. First operand has 513 places, 1128 transitions, 32628 flow. Second operand 31 states and 5396 transitions. [2023-08-31 01:40:39,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1296 transitions, 38795 flow [2023-08-31 01:40:43,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1296 transitions, 38048 flow, removed 293 selfloop flow, removed 10 redundant places. [2023-08-31 01:40:43,256 INFO L231 Difference]: Finished difference. Result has 533 places, 1126 transitions, 33730 flow [2023-08-31 01:40:43,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=31261, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33730, PETRI_PLACES=533, PETRI_TRANSITIONS=1126} [2023-08-31 01:40:43,257 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 513 predicate places. [2023-08-31 01:40:43,257 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1126 transitions, 33730 flow [2023-08-31 01:40:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:40:43,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:43,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:43,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:43,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-31 01:40:43,465 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:43,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 578571649, now seen corresponding path program 53 times [2023-08-31 01:40:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363029065] [2023-08-31 01:40:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363029065] [2023-08-31 01:40:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363029065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279880560] [2023-08-31 01:40:43,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:40:43,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:43,536 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-31 01:40:43,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:40:43,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:43,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:43,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279880560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:43,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:43,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 01:40:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067843054] [2023-08-31 01:40:43,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:40:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:43,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:40:43,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:40:43,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:43,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1126 transitions, 33730 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states 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 01:40:43,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:43,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:47,430 INFO L130 PetriNetUnfolder]: 3350/6697 cut-off events. [2023-08-31 01:40:47,430 INFO L131 PetriNetUnfolder]: For 413277/413277 co-relation queries the response was YES. [2023-08-31 01:40:47,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85488 conditions, 6697 events. 3350/6697 cut-off events. For 413277/413277 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 55449 event pairs, 288 based on Foata normal form. 78/6775 useless extension candidates. Maximal degree in co-relation 85306. Up to 5716 conditions per place. [2023-08-31 01:40:47,543 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1144 selfloop transitions, 226 changer transitions 0/1370 dead transitions. [2023-08-31 01:40:47,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1370 transitions, 42462 flow [2023-08-31 01:40:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:40:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:40:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3512 transitions. [2023-08-31 01:40:47,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262135922330097 [2023-08-31 01:40:47,546 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3512 transitions. [2023-08-31 01:40:47,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3512 transitions. [2023-08-31 01:40:47,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:47,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3512 transitions. [2023-08-31 01:40:47,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.6) internal successors, (3512), 20 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states 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 01:40:47,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:40:47,552 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:40:47,552 INFO L175 Difference]: Start difference. First operand has 533 places, 1126 transitions, 33730 flow. Second operand 20 states and 3512 transitions. [2023-08-31 01:40:47,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1370 transitions, 42462 flow [2023-08-31 01:40:51,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1370 transitions, 41117 flow, removed 337 selfloop flow, removed 20 redundant places. [2023-08-31 01:40:51,961 INFO L231 Difference]: Finished difference. Result has 540 places, 1281 transitions, 37880 flow [2023-08-31 01:40:51,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=32406, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37880, PETRI_PLACES=540, PETRI_TRANSITIONS=1281} [2023-08-31 01:40:51,963 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-31 01:40:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1281 transitions, 37880 flow [2023-08-31 01:40:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states 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 01:40:51,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:52,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-31 01:40:52,170 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:52,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash 240245433, now seen corresponding path program 54 times [2023-08-31 01:40:52,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:52,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83045548] [2023-08-31 01:40:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:52,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83045548] [2023-08-31 01:40:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83045548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385209487] [2023-08-31 01:40:52,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:40:52,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:52,236 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:52,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-31 01:40:52,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:40:52,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:52,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:40:52,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:52,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385209487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:52,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:52,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-31 01:40:52,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931178260] [2023-08-31 01:40:52,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:52,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:40:52,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:52,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:40:52,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:40:52,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:40:52,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1281 transitions, 37880 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states 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 01:40:52,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:52,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:40:52,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:56,961 INFO L130 PetriNetUnfolder]: 3832/7695 cut-off events. [2023-08-31 01:40:56,961 INFO L131 PetriNetUnfolder]: For 499496/499496 co-relation queries the response was YES. [2023-08-31 01:40:57,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99848 conditions, 7695 events. 3832/7695 cut-off events. For 499496/499496 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 65821 event pairs, 166 based on Foata normal form. 166/7861 useless extension candidates. Maximal degree in co-relation 99656. Up to 3135 conditions per place. [2023-08-31 01:40:57,095 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 879 selfloop transitions, 676 changer transitions 1/1556 dead transitions. [2023-08-31 01:40:57,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1556 transitions, 49153 flow [2023-08-31 01:40:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 01:40:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 01:40:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4032 transitions. [2023-08-31 01:40:57,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254959898691431 [2023-08-31 01:40:57,098 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4032 transitions. [2023-08-31 01:40:57,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4032 transitions. [2023-08-31 01:40:57,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:57,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4032 transitions. [2023-08-31 01:40:57,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 175.30434782608697) internal successors, (4032), 23 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states 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 01:40:57,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:40:57,104 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states 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 01:40:57,104 INFO L175 Difference]: Start difference. First operand has 540 places, 1281 transitions, 37880 flow. Second operand 23 states and 4032 transitions. [2023-08-31 01:40:57,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1556 transitions, 49153 flow [2023-08-31 01:41:02,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1556 transitions, 48246 flow, removed 318 selfloop flow, removed 7 redundant places. [2023-08-31 01:41:02,401 INFO L231 Difference]: Finished difference. Result has 560 places, 1416 transitions, 44202 flow [2023-08-31 01:41:02,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=36719, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=44202, PETRI_PLACES=560, PETRI_TRANSITIONS=1416} [2023-08-31 01:41:02,402 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2023-08-31 01:41:02,402 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1416 transitions, 44202 flow [2023-08-31 01:41:02,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states 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 01:41:02,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:41:02,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:41:02,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-31 01:41:02,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:02,603 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:41:02,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:41:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1169476999, now seen corresponding path program 55 times [2023-08-31 01:41:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:41:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249393970] [2023-08-31 01:41:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:41:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:41:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:41:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:02,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:41:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249393970] [2023-08-31 01:41:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249393970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:41:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647043981] [2023-08-31 01:41:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:41:02,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:41:02,667 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:41:02,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-31 01:41:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:41:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:41:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:41:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:02,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:41:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647043981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:41:02,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:41:02,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 01:41:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539481643] [2023-08-31 01:41:02,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:41:02,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:41:02,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:41:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:41:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:41:02,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:41:02,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1416 transitions, 44202 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:41:02,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:41:02,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:41:02,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:41:08,090 INFO L130 PetriNetUnfolder]: 3871/7710 cut-off events. [2023-08-31 01:41:08,090 INFO L131 PetriNetUnfolder]: For 531496/531496 co-relation queries the response was YES. [2023-08-31 01:41:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103760 conditions, 7710 events. 3871/7710 cut-off events. For 531496/531496 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65452 event pairs, 158 based on Foata normal form. 50/7760 useless extension candidates. Maximal degree in co-relation 103564. Up to 2496 conditions per place. [2023-08-31 01:41:08,219 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 739 selfloop transitions, 795 changer transitions 15/1549 dead transitions. [2023-08-31 01:41:08,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1549 transitions, 50834 flow [2023-08-31 01:41:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:41:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:41:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5380 transitions. [2023-08-31 01:41:08,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42123394926401503 [2023-08-31 01:41:08,222 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5380 transitions. [2023-08-31 01:41:08,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5380 transitions. [2023-08-31 01:41:08,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:41:08,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5380 transitions. [2023-08-31 01:41:08,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.5483870967742) internal successors, (5380), 31 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states 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 01:41:08,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:41:08,231 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:41:08,231 INFO L175 Difference]: Start difference. First operand has 560 places, 1416 transitions, 44202 flow. Second operand 31 states and 5380 transitions. [2023-08-31 01:41:08,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1549 transitions, 50834 flow [2023-08-31 01:41:14,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1549 transitions, 49512 flow, removed 413 selfloop flow, removed 16 redundant places. [2023-08-31 01:41:14,311 INFO L231 Difference]: Finished difference. Result has 580 places, 1443 transitions, 46817 flow [2023-08-31 01:41:14,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=42222, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=46817, PETRI_PLACES=580, PETRI_TRANSITIONS=1443} [2023-08-31 01:41:14,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-08-31 01:41:14,313 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1443 transitions, 46817 flow [2023-08-31 01:41:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:41:14,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:41:14,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:41:14,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-08-31 01:41:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:14,520 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:41:14,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:41:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1133843129, now seen corresponding path program 56 times [2023-08-31 01:41:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:41:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569659271] [2023-08-31 01:41:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:41:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:41:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:41:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:41:14,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569659271] [2023-08-31 01:41:14,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569659271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:41:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886700226] [2023-08-31 01:41:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:41:14,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:41:14,593 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:41:14,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-31 01:41:14,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:41:14,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:41:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:41:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:41:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:14,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:41:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886700226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:41:14,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:41:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-31 01:41:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554052706] [2023-08-31 01:41:14,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:41:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 01:41:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:41:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 01:41:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-31 01:41:14,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:41:14,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1443 transitions, 46817 flow. Second operand has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states 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 01:41:14,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:41:14,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:41:14,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:41:20,165 INFO L130 PetriNetUnfolder]: 4126/8265 cut-off events. [2023-08-31 01:41:20,165 INFO L131 PetriNetUnfolder]: For 609088/609088 co-relation queries the response was YES. [2023-08-31 01:41:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114945 conditions, 8265 events. 4126/8265 cut-off events. For 609088/609088 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 71258 event pairs, 180 based on Foata normal form. 40/8305 useless extension candidates. Maximal degree in co-relation 114748. Up to 2325 conditions per place. [2023-08-31 01:41:20,319 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 712 selfloop transitions, 916 changer transitions 20/1648 dead transitions. [2023-08-31 01:41:20,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1648 transitions, 56577 flow [2023-08-31 01:41:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 01:41:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 01:41:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5902 transitions. [2023-08-31 01:41:20,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133066818960596 [2023-08-31 01:41:20,322 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5902 transitions. [2023-08-31 01:41:20,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5902 transitions. [2023-08-31 01:41:20,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:41:20,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5902 transitions. [2023-08-31 01:41:20,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.58823529411765) internal successors, (5902), 34 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states 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 01:41:20,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states 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 01:41:20,331 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states 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 01:41:20,331 INFO L175 Difference]: Start difference. First operand has 580 places, 1443 transitions, 46817 flow. Second operand 34 states and 5902 transitions. [2023-08-31 01:41:20,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1648 transitions, 56577 flow [2023-08-31 01:41:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1648 transitions, 55166 flow, removed 592 selfloop flow, removed 14 redundant places. [2023-08-31 01:41:28,456 INFO L231 Difference]: Finished difference. Result has 604 places, 1531 transitions, 52715 flow [2023-08-31 01:41:28,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=45212, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52715, PETRI_PLACES=604, PETRI_TRANSITIONS=1531} [2023-08-31 01:41:28,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 584 predicate places. [2023-08-31 01:41:28,458 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1531 transitions, 52715 flow [2023-08-31 01:41:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states 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 01:41:28,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:41:28,458 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:41:28,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-31 01:41:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-31 01:41:28,660 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:41:28,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:41:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1710707121, now seen corresponding path program 57 times [2023-08-31 01:41:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:41:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656362526] [2023-08-31 01:41:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:41:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:41:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:41:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:28,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:41:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656362526] [2023-08-31 01:41:28,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656362526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:41:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755681609] [2023-08-31 01:41:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:41:28,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:41:28,752 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:41:28,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-31 01:41:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:41:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:41:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:41:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:41:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:28,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:41:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755681609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:41:28,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:41:28,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-31 01:41:28,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572759643] [2023-08-31 01:41:28,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:41:28,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:41:28,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:41:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:41:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:41:29,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:41:29,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1531 transitions, 52715 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states 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 01:41:29,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:41:29,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:41:29,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:41:36,100 INFO L130 PetriNetUnfolder]: 4921/9910 cut-off events. [2023-08-31 01:41:36,100 INFO L131 PetriNetUnfolder]: For 806267/806267 co-relation queries the response was YES. [2023-08-31 01:41:36,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143672 conditions, 9910 events. 4921/9910 cut-off events. For 806267/806267 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 88796 event pairs, 210 based on Foata normal form. 42/9952 useless extension candidates. Maximal degree in co-relation 143470. Up to 3017 conditions per place. [2023-08-31 01:41:36,279 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 946 selfloop transitions, 984 changer transitions 0/1930 dead transitions. [2023-08-31 01:41:36,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1930 transitions, 70216 flow [2023-08-31 01:41:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 01:41:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 01:41:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4208 transitions. [2023-08-31 01:41:36,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255663430420712 [2023-08-31 01:41:36,282 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4208 transitions. [2023-08-31 01:41:36,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4208 transitions. [2023-08-31 01:41:36,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:41:36,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4208 transitions. [2023-08-31 01:41:36,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.33333333333334) internal successors, (4208), 24 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states 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 01:41:36,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states 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 01:41:36,289 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states 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 01:41:36,289 INFO L175 Difference]: Start difference. First operand has 604 places, 1531 transitions, 52715 flow. Second operand 24 states and 4208 transitions. [2023-08-31 01:41:36,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1930 transitions, 70216 flow [2023-08-31 01:41:47,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1930 transitions, 68114 flow, removed 886 selfloop flow, removed 14 redundant places. [2023-08-31 01:41:47,908 INFO L231 Difference]: Finished difference. Result has 614 places, 1764 transitions, 63542 flow [2023-08-31 01:41:47,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=50405, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=63542, PETRI_PLACES=614, PETRI_TRANSITIONS=1764} [2023-08-31 01:41:47,909 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 594 predicate places. [2023-08-31 01:41:47,909 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1764 transitions, 63542 flow [2023-08-31 01:41:47,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states 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 01:41:47,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:41:47,910 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:41:47,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-08-31 01:41:48,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-31 01:41:48,110 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:41:48,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:41:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 695910137, now seen corresponding path program 58 times [2023-08-31 01:41:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:41:48,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354346956] [2023-08-31 01:41:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:41:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:41:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:41:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:41:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354346956] [2023-08-31 01:41:48,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354346956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:41:48,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869840051] [2023-08-31 01:41:48,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:41:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:41:48,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:41:48,189 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:41:48,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-31 01:41:48,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:41:48,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:41:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:41:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:41:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:48,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:41:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:41:48,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869840051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:41:48,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:41:48,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-31 01:41:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437789422] [2023-08-31 01:41:48,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:41:48,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:41:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:41:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:41:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:41:48,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:41:48,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1764 transitions, 63542 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 01:41:48,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:41:48,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:41:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:41:56,312 INFO L130 PetriNetUnfolder]: 5132/10371 cut-off events. [2023-08-31 01:41:56,312 INFO L131 PetriNetUnfolder]: For 847197/847197 co-relation queries the response was YES. [2023-08-31 01:41:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151560 conditions, 10371 events. 5132/10371 cut-off events. For 847197/847197 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 93994 event pairs, 866 based on Foata normal form. 2/10373 useless extension candidates. Maximal degree in co-relation 151352. Up to 5072 conditions per place. [2023-08-31 01:41:56,508 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1206 selfloop transitions, 681 changer transitions 7/1894 dead transitions. [2023-08-31 01:41:56,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1894 transitions, 70985 flow [2023-08-31 01:41:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 01:41:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 01:41:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2431 transitions. [2023-08-31 01:41:56,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214632454923717 [2023-08-31 01:41:56,510 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2431 transitions. [2023-08-31 01:41:56,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2431 transitions. [2023-08-31 01:41:56,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:41:56,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2431 transitions. [2023-08-31 01:41:56,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.64285714285714) internal successors, (2431), 14 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states 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 01:41:56,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:41:56,514 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states 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 01:41:56,514 INFO L175 Difference]: Start difference. First operand has 614 places, 1764 transitions, 63542 flow. Second operand 14 states and 2431 transitions. [2023-08-31 01:41:56,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1894 transitions, 70985 flow [2023-08-31 01:42:09,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1894 transitions, 69549 flow, removed 603 selfloop flow, removed 12 redundant places. [2023-08-31 01:42:09,336 INFO L231 Difference]: Finished difference. Result has 621 places, 1839 transitions, 66647 flow [2023-08-31 01:42:09,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=62147, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=66647, PETRI_PLACES=621, PETRI_TRANSITIONS=1839} [2023-08-31 01:42:09,338 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-08-31 01:42:09,338 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1839 transitions, 66647 flow [2023-08-31 01:42:09,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 01:42:09,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:42:09,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:42:09,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-31 01:42:09,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:42:09,539 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:42:09,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:42:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash 644662819, now seen corresponding path program 59 times [2023-08-31 01:42:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:42:09,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972565580] [2023-08-31 01:42:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:42:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:42:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:42:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:42:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972565580] [2023-08-31 01:42:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972565580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:42:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372402002] [2023-08-31 01:42:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:42:09,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:42:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:42:09,602 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:42:09,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-31 01:42:09,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:42:09,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:42:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:42:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:42:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:09,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:42:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372402002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:42:09,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:42:09,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-31 01:42:09,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279016067] [2023-08-31 01:42:09,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:42:09,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:42:09,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:42:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:42:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:42:09,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:42:09,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1839 transitions, 66647 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 01:42:09,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:42:09,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:42:09,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:42:18,406 INFO L130 PetriNetUnfolder]: 5258/10573 cut-off events. [2023-08-31 01:42:18,406 INFO L131 PetriNetUnfolder]: For 821197/821197 co-relation queries the response was YES. [2023-08-31 01:42:18,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154480 conditions, 10573 events. 5258/10573 cut-off events. For 821197/821197 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 95639 event pairs, 221 based on Foata normal form. 30/10603 useless extension candidates. Maximal degree in co-relation 154268. Up to 7874 conditions per place. [2023-08-31 01:42:18,618 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 1433 selfloop transitions, 517 changer transitions 0/1950 dead transitions. [2023-08-31 01:42:18,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1950 transitions, 73556 flow [2023-08-31 01:42:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:42:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:42:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1579 transitions. [2023-08-31 01:42:18,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583603020496225 [2023-08-31 01:42:18,619 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1579 transitions. [2023-08-31 01:42:18,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1579 transitions. [2023-08-31 01:42:18,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:42:18,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1579 transitions. [2023-08-31 01:42:18,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 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 01:42:18,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:42:18,622 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states 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 01:42:18,622 INFO L175 Difference]: Start difference. First operand has 621 places, 1839 transitions, 66647 flow. Second operand 9 states and 1579 transitions. [2023-08-31 01:42:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1950 transitions, 73556 flow [2023-08-31 01:42:32,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1950 transitions, 72812 flow, removed 121 selfloop flow, removed 9 redundant places. [2023-08-31 01:42:32,302 INFO L231 Difference]: Finished difference. Result has 621 places, 1888 transitions, 68972 flow [2023-08-31 01:42:32,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=65904, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68972, PETRI_PLACES=621, PETRI_TRANSITIONS=1888} [2023-08-31 01:42:32,304 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-08-31 01:42:32,304 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1888 transitions, 68972 flow [2023-08-31 01:42:32,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states 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 01:42:32,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:42:32,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:42:32,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-08-31 01:42:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-31 01:42:32,505 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:42:32,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:42:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2004137547, now seen corresponding path program 60 times [2023-08-31 01:42:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:42:32,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654628070] [2023-08-31 01:42:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:42:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:42:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:42:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:42:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654628070] [2023-08-31 01:42:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654628070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:42:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818277506] [2023-08-31 01:42:32,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:42:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:42:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:42:32,576 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:42:32,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-31 01:42:32,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:42:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:42:32,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:42:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:42:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:32,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:42:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:42:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818277506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:42:32,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:42:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-08-31 01:42:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066323849] [2023-08-31 01:42:32,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:42:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:42:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:42:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:42:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:42:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:42:32,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1888 transitions, 68972 flow. Second operand has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 01:42:32,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:42:32,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:42:32,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:42:42,029 INFO L130 PetriNetUnfolder]: 5548/11175 cut-off events. [2023-08-31 01:42:42,029 INFO L131 PetriNetUnfolder]: For 880610/880610 co-relation queries the response was YES. [2023-08-31 01:42:42,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 11175 events. 5548/11175 cut-off events. For 880610/880610 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 102302 event pairs, 795 based on Foata normal form. 16/11191 useless extension candidates. Maximal degree in co-relation 163980. Up to 3253 conditions per place. [2023-08-31 01:42:42,255 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1261 selfloop transitions, 825 changer transitions 10/2096 dead transitions. [2023-08-31 01:42:42,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 2096 transitions, 78971 flow [2023-08-31 01:42:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 01:42:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 01:42:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4177 transitions. [2023-08-31 01:42:42,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42243122977346276 [2023-08-31 01:42:42,257 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4177 transitions. [2023-08-31 01:42:42,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4177 transitions. [2023-08-31 01:42:42,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:42:42,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4177 transitions. [2023-08-31 01:42:42,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.04166666666666) internal successors, (4177), 24 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states 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 01:42:42,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states 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 01:42:42,264 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states 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 01:42:42,264 INFO L175 Difference]: Start difference. First operand has 621 places, 1888 transitions, 68972 flow. Second operand 24 states and 4177 transitions. [2023-08-31 01:42:42,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 2096 transitions, 78971 flow [2023-08-31 01:42:56,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2096 transitions, 78314 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-31 01:42:56,946 INFO L231 Difference]: Finished difference. Result has 648 places, 1982 transitions, 74899 flow [2023-08-31 01:42:56,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=68185, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=74899, PETRI_PLACES=648, PETRI_TRANSITIONS=1982} [2023-08-31 01:42:56,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2023-08-31 01:42:56,948 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 1982 transitions, 74899 flow [2023-08-31 01:42:56,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 01:42:56,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:42:56,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:42:56,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-08-31 01:42:57,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:42:57,149 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:42:57,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:42:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2099469555, now seen corresponding path program 61 times [2023-08-31 01:42:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:42:57,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91769756] [2023-08-31 01:42:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:42:57,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:42:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:42:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:42:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91769756] [2023-08-31 01:42:57,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91769756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:42:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477187976] [2023-08-31 01:42:57,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:42:57,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:42:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:42:57,219 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:42:57,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-31 01:42:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:42:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:42:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:42:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:57,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:42:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:42:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477187976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:42:57,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:42:57,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 01:42:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264713461] [2023-08-31 01:42:57,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:42:57,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:42:57,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:42:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:42:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:42:57,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:42:57,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 1982 transitions, 74899 flow. Second operand has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 01:42:57,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:42:57,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:42:57,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:43:07,136 INFO L130 PetriNetUnfolder]: 5625/11332 cut-off events. [2023-08-31 01:43:07,136 INFO L131 PetriNetUnfolder]: For 987381/987381 co-relation queries the response was YES. [2023-08-31 01:43:07,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172202 conditions, 11332 events. 5625/11332 cut-off events. For 987381/987381 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 103934 event pairs, 833 based on Foata normal form. 8/11340 useless extension candidates. Maximal degree in co-relation 171982. Up to 3527 conditions per place. [2023-08-31 01:43:07,370 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1284 selfloop transitions, 835 changer transitions 8/2127 dead transitions. [2023-08-31 01:43:07,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2127 transitions, 83076 flow [2023-08-31 01:43:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 01:43:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 01:43:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5554 transitions. [2023-08-31 01:43:07,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-08-31 01:43:07,373 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5554 transitions. [2023-08-31 01:43:07,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5554 transitions. [2023-08-31 01:43:07,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:43:07,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5554 transitions. [2023-08-31 01:43:07,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.5625) internal successors, (5554), 32 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states 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 01:43:07,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states 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 01:43:07,382 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states 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 01:43:07,382 INFO L175 Difference]: Start difference. First operand has 648 places, 1982 transitions, 74899 flow. Second operand 32 states and 5554 transitions. [2023-08-31 01:43:07,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2127 transitions, 83076 flow [2023-08-31 01:43:25,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2127 transitions, 81458 flow, removed 723 selfloop flow, removed 10 redundant places. [2023-08-31 01:43:25,382 INFO L231 Difference]: Finished difference. Result has 676 places, 2029 transitions, 78721 flow [2023-08-31 01:43:25,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=73772, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=78721, PETRI_PLACES=676, PETRI_TRANSITIONS=2029} [2023-08-31 01:43:25,384 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 656 predicate places. [2023-08-31 01:43:25,384 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 2029 transitions, 78721 flow [2023-08-31 01:43:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 01:43:25,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:43:25,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:43:25,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-31 01:43:25,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:43:25,585 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:43:25,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:43:25,586 INFO L85 PathProgramCache]: Analyzing trace with hash -265543753, now seen corresponding path program 62 times [2023-08-31 01:43:25,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:43:25,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792447320] [2023-08-31 01:43:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:43:25,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:43:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:43:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:43:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:43:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792447320] [2023-08-31 01:43:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792447320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:43:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902474165] [2023-08-31 01:43:25,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:43:25,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:43:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:43:25,654 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:43:25,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-31 01:43:25,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:43:25,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:43:25,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:43:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:43:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:43:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:43:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 01:43:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902474165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:43:25,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:43:25,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-08-31 01:43:25,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338319674] [2023-08-31 01:43:25,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:43:25,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:43:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:43:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:43:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:43:25,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:43:25,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 2029 transitions, 78721 flow. Second operand has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states 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 01:43:25,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:43:25,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:43:25,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:43:36,009 INFO L130 PetriNetUnfolder]: 5655/11394 cut-off events. [2023-08-31 01:43:36,009 INFO L131 PetriNetUnfolder]: For 1054436/1054436 co-relation queries the response was YES. [2023-08-31 01:43:36,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176386 conditions, 11394 events. 5655/11394 cut-off events. For 1054436/1054436 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 104754 event pairs, 2166 based on Foata normal form. 62/11456 useless extension candidates. Maximal degree in co-relation 176160. Up to 10806 conditions per place. [2023-08-31 01:43:36,257 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1979 selfloop transitions, 118 changer transitions 2/2099 dead transitions. [2023-08-31 01:43:36,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 2099 transitions, 84431 flow [2023-08-31 01:43:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 01:43:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 01:43:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2803 transitions. [2023-08-31 01:43:36,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252123786407767 [2023-08-31 01:43:36,259 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2803 transitions. [2023-08-31 01:43:36,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2803 transitions. [2023-08-31 01:43:36,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:43:36,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2803 transitions. [2023-08-31 01:43:36,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 175.1875) internal successors, (2803), 16 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states 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 01:43:36,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states 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 01:43:36,264 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states 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 01:43:36,264 INFO L175 Difference]: Start difference. First operand has 676 places, 2029 transitions, 78721 flow. Second operand 16 states and 2803 transitions. [2023-08-31 01:43:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 2099 transitions, 84431 flow [2023-08-31 01:43:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2099 transitions, 82952 flow, removed 499 selfloop flow, removed 16 redundant places. [2023-08-31 01:43:55,435 INFO L231 Difference]: Finished difference. Result has 678 places, 2036 transitions, 77993 flow [2023-08-31 01:43:55,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77045, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=77993, PETRI_PLACES=678, PETRI_TRANSITIONS=2036} [2023-08-31 01:43:55,436 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 658 predicate places. [2023-08-31 01:43:55,436 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2036 transitions, 77993 flow [2023-08-31 01:43:55,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states 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 01:43:55,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:43:55,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:43:55,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-31 01:43:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-31 01:43:55,637 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:43:55,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:43:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1180036555, now seen corresponding path program 63 times [2023-08-31 01:43:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:43:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543140415] [2023-08-31 01:43:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:43:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:43:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:43:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:43:55,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:43:55,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543140415] [2023-08-31 01:43:55,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543140415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:43:55,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239864430] [2023-08-31 01:43:55,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:43:55,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:43:55,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:43:55,714 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:43:55,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-31 01:43:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:43:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:43:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:43:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:43:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:43:55,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:43:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:43:55,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239864430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:43:55,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:43:55,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-31 01:43:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17111647] [2023-08-31 01:43:55,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:43:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 01:43:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:43:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 01:43:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-31 01:43:55,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:43:55,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2036 transitions, 77993 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:43:55,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:43:55,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:43:55,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:06,248 INFO L130 PetriNetUnfolder]: 5740/11503 cut-off events. [2023-08-31 01:44:06,248 INFO L131 PetriNetUnfolder]: For 1078291/1078291 co-relation queries the response was YES. [2023-08-31 01:44:06,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178113 conditions, 11503 events. 5740/11503 cut-off events. For 1078291/1078291 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 105191 event pairs, 511 based on Foata normal form. 86/11589 useless extension candidates. Maximal degree in co-relation 177882. Up to 9927 conditions per place. [2023-08-31 01:44:06,476 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1806 selfloop transitions, 360 changer transitions 2/2168 dead transitions. [2023-08-31 01:44:06,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2168 transitions, 86315 flow [2023-08-31 01:44:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:44:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:44:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3659 transitions. [2023-08-31 01:44:06,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229079981507166 [2023-08-31 01:44:06,479 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3659 transitions. [2023-08-31 01:44:06,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3659 transitions. [2023-08-31 01:44:06,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:06,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3659 transitions. [2023-08-31 01:44:06,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.23809523809524) internal successors, (3659), 21 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states 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 01:44:06,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states 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 01:44:06,485 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states 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 01:44:06,485 INFO L175 Difference]: Start difference. First operand has 678 places, 2036 transitions, 77993 flow. Second operand 21 states and 3659 transitions. [2023-08-31 01:44:06,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2168 transitions, 86315 flow [2023-08-31 01:44:25,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2168 transitions, 86022 flow, removed 93 selfloop flow, removed 5 redundant places. [2023-08-31 01:44:26,000 INFO L231 Difference]: Finished difference. Result has 699 places, 2087 transitions, 80552 flow [2023-08-31 01:44:26,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77216, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=80552, PETRI_PLACES=699, PETRI_TRANSITIONS=2087} [2023-08-31 01:44:26,002 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 679 predicate places. [2023-08-31 01:44:26,002 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 2087 transitions, 80552 flow [2023-08-31 01:44:26,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states 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 01:44:26,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:26,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:26,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-31 01:44:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:26,204 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:44:26,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:26,204 INFO L85 PathProgramCache]: Analyzing trace with hash -458574299, now seen corresponding path program 64 times [2023-08-31 01:44:26,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:26,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995347737] [2023-08-31 01:44:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:26,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995347737] [2023-08-31 01:44:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995347737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593696890] [2023-08-31 01:44:26,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:44:26,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:26,297 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:26,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-31 01:44:26,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:44:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:44:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:26,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593696890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:26,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:26,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 01:44:26,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287096331] [2023-08-31 01:44:26,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:44:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:26,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:44:26,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:44:26,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:44:26,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 2087 transitions, 80552 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:44:26,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:26,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:44:26,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:44:36,641 INFO L130 PetriNetUnfolder]: 5736/11503 cut-off events. [2023-08-31 01:44:36,641 INFO L131 PetriNetUnfolder]: For 1065756/1065756 co-relation queries the response was YES. [2023-08-31 01:44:36,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179587 conditions, 11503 events. 5736/11503 cut-off events. For 1065756/1065756 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 105621 event pairs, 828 based on Foata normal form. 4/11507 useless extension candidates. Maximal degree in co-relation 179350. Up to 3646 conditions per place. [2023-08-31 01:44:36,874 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1267 selfloop transitions, 893 changer transitions 4/2164 dead transitions. [2023-08-31 01:44:36,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 2164 transitions, 86025 flow [2023-08-31 01:44:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:44:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:44:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4514 transitions. [2023-08-31 01:44:36,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213965646004481 [2023-08-31 01:44:36,878 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4514 transitions. [2023-08-31 01:44:36,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4514 transitions. [2023-08-31 01:44:36,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:44:36,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4514 transitions. [2023-08-31 01:44:36,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.6153846153846) internal successors, (4514), 26 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states 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 01:44:36,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:44:36,888 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:44:36,888 INFO L175 Difference]: Start difference. First operand has 699 places, 2087 transitions, 80552 flow. Second operand 26 states and 4514 transitions. [2023-08-31 01:44:36,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 2164 transitions, 86025 flow [2023-08-31 01:44:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2164 transitions, 85344 flow, removed 287 selfloop flow, removed 10 redundant places. [2023-08-31 01:44:56,920 INFO L231 Difference]: Finished difference. Result has 717 places, 2087 transitions, 81886 flow [2023-08-31 01:44:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79851, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=81886, PETRI_PLACES=717, PETRI_TRANSITIONS=2087} [2023-08-31 01:44:56,922 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 697 predicate places. [2023-08-31 01:44:56,922 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2087 transitions, 81886 flow [2023-08-31 01:44:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 01:44:56,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:44:56,922 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:44:56,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-08-31 01:44:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:57,124 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:44:57,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:44:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 546172837, now seen corresponding path program 65 times [2023-08-31 01:44:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:44:57,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563478009] [2023-08-31 01:44:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:44:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:44:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:44:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:57,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:44:57,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563478009] [2023-08-31 01:44:57,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563478009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:44:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028058156] [2023-08-31 01:44:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:44:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:44:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:44:57,190 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:44:57,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-31 01:44:57,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:44:57,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:44:57,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:44:57,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:44:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:44:57,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:44:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:44:57,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028058156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:44:57,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:44:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-31 01:44:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238849594] [2023-08-31 01:44:57,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:44:57,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:44:57,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:44:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:44:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:44:57,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:44:57,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2087 transitions, 81886 flow. Second operand has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states 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 01:44:57,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:44:57,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:44:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:45:09,045 INFO L130 PetriNetUnfolder]: 6210/12485 cut-off events. [2023-08-31 01:45:09,046 INFO L131 PetriNetUnfolder]: For 1273021/1273021 co-relation queries the response was YES. [2023-08-31 01:45:09,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199106 conditions, 12485 events. 6210/12485 cut-off events. For 1273021/1273021 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 116022 event pairs, 971 based on Foata normal form. 28/12513 useless extension candidates. Maximal degree in co-relation 198866. Up to 3941 conditions per place. [2023-08-31 01:45:09,306 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1474 selfloop transitions, 894 changer transitions 6/2374 dead transitions. [2023-08-31 01:45:09,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2374 transitions, 95973 flow [2023-08-31 01:45:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 01:45:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 01:45:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4521 transitions. [2023-08-31 01:45:09,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220500373412995 [2023-08-31 01:45:09,308 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4521 transitions. [2023-08-31 01:45:09,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4521 transitions. [2023-08-31 01:45:09,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:45:09,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4521 transitions. [2023-08-31 01:45:09,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.8846153846154) internal successors, (4521), 26 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states 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 01:45:09,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:45:09,316 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states 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 01:45:09,316 INFO L175 Difference]: Start difference. First operand has 717 places, 2087 transitions, 81886 flow. Second operand 26 states and 4521 transitions. [2023-08-31 01:45:09,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2374 transitions, 95973 flow [2023-08-31 01:45:32,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2374 transitions, 94145 flow, removed 146 selfloop flow, removed 14 redundant places. [2023-08-31 01:45:32,611 INFO L231 Difference]: Finished difference. Result has 737 places, 2251 transitions, 90446 flow [2023-08-31 01:45:32,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79884, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=90446, PETRI_PLACES=737, PETRI_TRANSITIONS=2251} [2023-08-31 01:45:32,613 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 717 predicate places. [2023-08-31 01:45:32,613 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2251 transitions, 90446 flow [2023-08-31 01:45:32,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states 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 01:45:32,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:45:32,614 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:45:32,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-31 01:45:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:32,820 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:45:32,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:45:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1998320291, now seen corresponding path program 66 times [2023-08-31 01:45:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:45:32,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131235895] [2023-08-31 01:45:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:45:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:45:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:45:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:45:32,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:45:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131235895] [2023-08-31 01:45:32,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131235895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:45:32,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181384493] [2023-08-31 01:45:32,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:45:32,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:45:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:45:32,907 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:45:32,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-31 01:45:33,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 01:45:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:45:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:45:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:45:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:45:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:45:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:45:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181384493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:45:33,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:45:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-31 01:45:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643624779] [2023-08-31 01:45:33,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:45:33,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:45:33,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:45:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:45:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:45:33,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:45:33,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2251 transitions, 90446 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states 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 01:45:33,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:45:33,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:45:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:45:46,356 INFO L130 PetriNetUnfolder]: 6506/13103 cut-off events. [2023-08-31 01:45:46,356 INFO L131 PetriNetUnfolder]: For 1484422/1484422 co-relation queries the response was YES. [2023-08-31 01:45:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215101 conditions, 13103 events. 6506/13103 cut-off events. For 1484422/1484422 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 122184 event pairs, 285 based on Foata normal form. 68/13171 useless extension candidates. Maximal degree in co-relation 214852. Up to 7101 conditions per place. [2023-08-31 01:45:46,637 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1738 selfloop transitions, 753 changer transitions 6/2497 dead transitions. [2023-08-31 01:45:46,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2497 transitions, 105089 flow [2023-08-31 01:45:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 01:45:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 01:45:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5549 transitions. [2023-08-31 01:45:46,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42088895631067963 [2023-08-31 01:45:46,640 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5549 transitions. [2023-08-31 01:45:46,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5549 transitions. [2023-08-31 01:45:46,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:45:46,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5549 transitions. [2023-08-31 01:45:46,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.40625) internal successors, (5549), 32 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states 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 01:45:46,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states 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 01:45:46,649 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states 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 01:45:46,649 INFO L175 Difference]: Start difference. First operand has 737 places, 2251 transitions, 90446 flow. Second operand 32 states and 5549 transitions. [2023-08-31 01:45:46,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2497 transitions, 105089 flow [2023-08-31 01:46:14,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 2497 transitions, 102502 flow, removed 958 selfloop flow, removed 15 redundant places. [2023-08-31 01:46:14,598 INFO L231 Difference]: Finished difference. Result has 764 places, 2391 transitions, 96982 flow [2023-08-31 01:46:14,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=88453, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=96982, PETRI_PLACES=764, PETRI_TRANSITIONS=2391} [2023-08-31 01:46:14,600 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 744 predicate places. [2023-08-31 01:46:14,600 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 2391 transitions, 96982 flow [2023-08-31 01:46:14,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states 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 01:46:14,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:46:14,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:46:14,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-31 01:46:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-31 01:46:14,801 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:46:14,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:46:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash 414514617, now seen corresponding path program 67 times [2023-08-31 01:46:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:46:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851618619] [2023-08-31 01:46:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:46:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:46:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:46:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:46:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:46:14,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851618619] [2023-08-31 01:46:14,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851618619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:46:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495876393] [2023-08-31 01:46:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:46:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:46:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:46:14,864 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:46:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-31 01:46:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:46:14,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:46:14,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:46:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:46:15,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:46:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:46:15,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495876393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:46:15,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:46:15,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-31 01:46:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799900929] [2023-08-31 01:46:15,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:46:15,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:46:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:46:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:46:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:46:15,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:46:15,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 2391 transitions, 96982 flow. Second operand has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states 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 01:46:15,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:46:15,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:46:15,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:46:30,061 INFO L130 PetriNetUnfolder]: 7052/14173 cut-off events. [2023-08-31 01:46:30,062 INFO L131 PetriNetUnfolder]: For 1702508/1702508 co-relation queries the response was YES. [2023-08-31 01:46:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239137 conditions, 14173 events. 7052/14173 cut-off events. For 1702508/1702508 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 134216 event pairs, 517 based on Foata normal form. 110/14283 useless extension candidates. Maximal degree in co-relation 238878. Up to 9352 conditions per place. [2023-08-31 01:46:30,396 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1879 selfloop transitions, 866 changer transitions 0/2745 dead transitions. [2023-08-31 01:46:30,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2745 transitions, 116600 flow [2023-08-31 01:46:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 01:46:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 01:46:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3839 transitions. [2023-08-31 01:46:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-08-31 01:46:30,399 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3839 transitions. [2023-08-31 01:46:30,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3839 transitions. [2023-08-31 01:46:30,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:46:30,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3839 transitions. [2023-08-31 01:46:30,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.5) internal successors, (3839), 22 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states 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 01:46:30,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:46:30,405 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states 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 01:46:30,405 INFO L175 Difference]: Start difference. First operand has 764 places, 2391 transitions, 96982 flow. Second operand 22 states and 3839 transitions. [2023-08-31 01:46:30,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2745 transitions, 116600 flow [2023-08-31 01:47:03,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2745 transitions, 113324 flow, removed 1144 selfloop flow, removed 16 redundant places. [2023-08-31 01:47:03,341 INFO L231 Difference]: Finished difference. Result has 777 places, 2579 transitions, 105209 flow [2023-08-31 01:47:03,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=93622, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=105209, PETRI_PLACES=777, PETRI_TRANSITIONS=2579} [2023-08-31 01:47:03,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 757 predicate places. [2023-08-31 01:47:03,344 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2579 transitions, 105209 flow [2023-08-31 01:47:03,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states 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 01:47:03,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:47:03,345 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:47:03,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-31 01:47:03,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:47:03,550 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:47:03,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:47:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1977314083, now seen corresponding path program 68 times [2023-08-31 01:47:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:47:03,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239024084] [2023-08-31 01:47:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:47:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:47:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:47:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:47:03,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:47:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239024084] [2023-08-31 01:47:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239024084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:47:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293544405] [2023-08-31 01:47:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:47:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:47:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:47:03,674 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:47:03,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-31 01:47:03,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:47:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:47:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:47:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:47:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:47:03,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:47:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:47:03,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293544405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:47:03,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:47:03,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-08-31 01:47:03,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926355179] [2023-08-31 01:47:03,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:47:03,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 01:47:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:47:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 01:47:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-31 01:47:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:47:03,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2579 transitions, 105209 flow. Second operand has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:47:03,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:47:03,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:47:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:47:20,029 INFO L130 PetriNetUnfolder]: 6955/14036 cut-off events. [2023-08-31 01:47:20,029 INFO L131 PetriNetUnfolder]: For 1617603/1617603 co-relation queries the response was YES. [2023-08-31 01:47:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235552 conditions, 14036 events. 6955/14036 cut-off events. For 1617603/1617603 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 132966 event pairs, 269 based on Foata normal form. 92/14128 useless extension candidates. Maximal degree in co-relation 235286. Up to 6204 conditions per place. [2023-08-31 01:47:20,455 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1660 selfloop transitions, 1072 changer transitions 8/2740 dead transitions. [2023-08-31 01:47:20,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2740 transitions, 116339 flow [2023-08-31 01:47:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 01:47:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 01:47:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5376 transitions. [2023-08-31 01:47:20,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42092076417162544 [2023-08-31 01:47:20,458 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5376 transitions. [2023-08-31 01:47:20,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5376 transitions. [2023-08-31 01:47:20,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:47:20,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5376 transitions. [2023-08-31 01:47:20,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.41935483870967) internal successors, (5376), 31 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states 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 01:47:20,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:47:20,467 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states 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 01:47:20,467 INFO L175 Difference]: Start difference. First operand has 777 places, 2579 transitions, 105209 flow. Second operand 31 states and 5376 transitions. [2023-08-31 01:47:20,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2740 transitions, 116339 flow [2023-08-31 01:47:53,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2740 transitions, 113467 flow, removed 996 selfloop flow, removed 10 redundant places. [2023-08-31 01:47:53,664 INFO L231 Difference]: Finished difference. Result has 801 places, 2615 transitions, 107085 flow [2023-08-31 01:47:53,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=101248, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=107085, PETRI_PLACES=801, PETRI_TRANSITIONS=2615} [2023-08-31 01:47:53,666 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 781 predicate places. [2023-08-31 01:47:53,667 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2615 transitions, 107085 flow [2023-08-31 01:47:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:47:53,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:47:53,667 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:47:53,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-31 01:47:53,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:47:53,873 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:47:53,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:47:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -21418435, now seen corresponding path program 69 times [2023-08-31 01:47:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:47:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549882596] [2023-08-31 01:47:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:47:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:47:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:47:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:47:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:47:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549882596] [2023-08-31 01:47:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549882596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:47:53,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656749876] [2023-08-31 01:47:53,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:47:53,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:47:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:47:53,939 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:47:53,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-31 01:47:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 01:47:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:47:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:47:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:47:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:47:54,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:47:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:47:54,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656749876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:47:54,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:47:54,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-31 01:47:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715994776] [2023-08-31 01:47:54,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:47:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:47:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:47:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:47:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:47:54,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:47:54,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2615 transitions, 107085 flow. Second operand has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 01:47:54,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:47:54,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:47:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:48:10,377 INFO L130 PetriNetUnfolder]: 6961/14034 cut-off events. [2023-08-31 01:48:10,377 INFO L131 PetriNetUnfolder]: For 1555819/1555819 co-relation queries the response was YES. [2023-08-31 01:48:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237742 conditions, 14034 events. 6961/14034 cut-off events. For 1555819/1555819 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 132831 event pairs, 281 based on Foata normal form. 28/14062 useless extension candidates. Maximal degree in co-relation 237476. Up to 6341 conditions per place. [2023-08-31 01:48:10,694 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1678 selfloop transitions, 1097 changer transitions 6/2781 dead transitions. [2023-08-31 01:48:10,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 2781 transitions, 118427 flow [2023-08-31 01:48:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 01:48:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 01:48:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5896 transitions. [2023-08-31 01:48:10,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209023415191319 [2023-08-31 01:48:10,697 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5896 transitions. [2023-08-31 01:48:10,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5896 transitions. [2023-08-31 01:48:10,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:48:10,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5896 transitions. [2023-08-31 01:48:10,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.41176470588235) internal successors, (5896), 34 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states 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 01:48:10,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states 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 01:48:10,707 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states 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 01:48:10,707 INFO L175 Difference]: Start difference. First operand has 801 places, 2615 transitions, 107085 flow. Second operand 34 states and 5896 transitions. [2023-08-31 01:48:10,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 2781 transitions, 118427 flow [2023-08-31 01:48:43,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2781 transitions, 116318 flow, removed 922 selfloop flow, removed 17 redundant places. [2023-08-31 01:48:43,962 INFO L231 Difference]: Finished difference. Result has 826 places, 2655 transitions, 111299 flow [2023-08-31 01:48:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=105284, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=111299, PETRI_PLACES=826, PETRI_TRANSITIONS=2655} [2023-08-31 01:48:43,965 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 806 predicate places. [2023-08-31 01:48:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 2655 transitions, 111299 flow [2023-08-31 01:48:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 01:48:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:48:43,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:48:43,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-31 01:48:44,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-31 01:48:44,171 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:48:44,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:48:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1244867451, now seen corresponding path program 70 times [2023-08-31 01:48:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:48:44,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494960069] [2023-08-31 01:48:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:48:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:48:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:48:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:48:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494960069] [2023-08-31 01:48:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494960069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:48:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326006460] [2023-08-31 01:48:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:48:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:48:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:48:44,238 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:48:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-31 01:48:44,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:48:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:48:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:48:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:48:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:44,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:48:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:48:44,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326006460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:48:44,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:48:44,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-31 01:48:44,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389365183] [2023-08-31 01:48:44,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:48:44,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:48:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:48:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:48:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:48:44,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:48:44,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 2655 transitions, 111299 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states 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 01:48:44,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:48:44,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:48:44,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:49:02,361 INFO L130 PetriNetUnfolder]: 7009/14176 cut-off events. [2023-08-31 01:49:02,362 INFO L131 PetriNetUnfolder]: For 1569885/1569885 co-relation queries the response was YES. [2023-08-31 01:49:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240940 conditions, 14176 events. 7009/14176 cut-off events. For 1569885/1569885 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 135145 event pairs, 2289 based on Foata normal form. 64/14240 useless extension candidates. Maximal degree in co-relation 240666. Up to 11093 conditions per place. [2023-08-31 01:49:02,698 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 2339 selfloop transitions, 459 changer transitions 0/2798 dead transitions. [2023-08-31 01:49:02,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 2798 transitions, 121645 flow [2023-08-31 01:49:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 01:49:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 01:49:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3496 transitions. [2023-08-31 01:49:02,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242718446601942 [2023-08-31 01:49:02,701 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3496 transitions. [2023-08-31 01:49:02,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3496 transitions. [2023-08-31 01:49:02,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:49:02,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3496 transitions. [2023-08-31 01:49:02,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.8) internal successors, (3496), 20 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states 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 01:49:02,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:49:02,707 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states 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 01:49:02,707 INFO L175 Difference]: Start difference. First operand has 826 places, 2655 transitions, 111299 flow. Second operand 20 states and 3496 transitions. [2023-08-31 01:49:02,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 2798 transitions, 121645 flow [2023-08-31 01:49:38,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 2798 transitions, 120350 flow, removed 436 selfloop flow, removed 19 redundant places. [2023-08-31 01:49:38,099 INFO L231 Difference]: Finished difference. Result has 829 places, 2676 transitions, 112655 flow [2023-08-31 01:49:38,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=109616, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=112655, PETRI_PLACES=829, PETRI_TRANSITIONS=2676} [2023-08-31 01:49:38,101 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2023-08-31 01:49:38,101 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2676 transitions, 112655 flow [2023-08-31 01:49:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states 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 01:49:38,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:49:38,102 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:49:38,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-31 01:49:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:49:38,308 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:49:38,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:49:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1560994467, now seen corresponding path program 71 times [2023-08-31 01:49:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:49:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134448486] [2023-08-31 01:49:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:49:38,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:49:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:49:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:49:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:49:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134448486] [2023-08-31 01:49:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134448486] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:49:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985768077] [2023-08-31 01:49:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:49:38,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:49:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:49:38,383 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:49:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-31 01:49:38,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 01:49:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:49:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:49:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:49:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:49:38,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:49:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:49:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985768077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:49:38,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:49:38,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-31 01:49:38,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985888298] [2023-08-31 01:49:38,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:49:38,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:49:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:49:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:49:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:49:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:49:38,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2676 transitions, 112655 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states 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 01:49:38,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:49:38,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:49:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:49:58,720 INFO L130 PetriNetUnfolder]: 7967/16156 cut-off events. [2023-08-31 01:49:58,720 INFO L131 PetriNetUnfolder]: For 1898636/1898636 co-relation queries the response was YES. [2023-08-31 01:49:59,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278656 conditions, 16156 events. 7967/16156 cut-off events. For 1898636/1898636 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157258 event pairs, 239 based on Foata normal form. 48/16204 useless extension candidates. Maximal degree in co-relation 278382. Up to 5941 conditions per place. [2023-08-31 01:49:59,153 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1793 selfloop transitions, 1383 changer transitions 3/3179 dead transitions. [2023-08-31 01:49:59,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 3179 transitions, 139852 flow [2023-08-31 01:49:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 01:49:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 01:49:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6265 transitions. [2023-08-31 01:49:59,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223975188781014 [2023-08-31 01:49:59,158 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6265 transitions. [2023-08-31 01:49:59,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6265 transitions. [2023-08-31 01:49:59,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:49:59,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6265 transitions. [2023-08-31 01:49:59,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 174.02777777777777) internal successors, (6265), 36 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states 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 01:49:59,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states 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 01:49:59,170 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states 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 01:49:59,171 INFO L175 Difference]: Start difference. First operand has 829 places, 2676 transitions, 112655 flow. Second operand 36 states and 6265 transitions. [2023-08-31 01:49:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 3179 transitions, 139852 flow [2023-08-31 01:50:42,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 3179 transitions, 138546 flow, removed 359 selfloop flow, removed 9 redundant places. [2023-08-31 01:50:42,122 INFO L231 Difference]: Finished difference. Result has 864 places, 2968 transitions, 130690 flow [2023-08-31 01:50:42,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=111497, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=130690, PETRI_PLACES=864, PETRI_TRANSITIONS=2968} [2023-08-31 01:50:42,124 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 844 predicate places. [2023-08-31 01:50:42,124 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 2968 transitions, 130690 flow [2023-08-31 01:50:42,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states 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 01:50:42,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:50:42,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:50:42,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-08-31 01:50:42,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:50:42,325 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:50:42,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:50:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -42424643, now seen corresponding path program 72 times [2023-08-31 01:50:42,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:50:42,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982737931] [2023-08-31 01:50:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:50:42,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:50:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:50:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:50:42,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:50:42,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982737931] [2023-08-31 01:50:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982737931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:50:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446597828] [2023-08-31 01:50:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:50:42,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:50:42,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:50:42,393 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:50:42,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-31 01:50:42,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 01:50:42,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:50:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 01:50:42,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:50:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:50:42,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:50:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:50:42,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446597828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:50:42,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:50:42,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-08-31 01:50:42,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111571783] [2023-08-31 01:50:42,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:50:42,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:50:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:50:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:50:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:50:42,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-08-31 01:50:42,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 2968 transitions, 130690 flow. Second operand has 18 states, 18 states have (on average 170.77777777777777) internal successors, (3074), 18 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states 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 01:50:42,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:50:42,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-08-31 01:50:42,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:51:07,474 INFO L130 PetriNetUnfolder]: 8219/16682 cut-off events. [2023-08-31 01:51:07,475 INFO L131 PetriNetUnfolder]: For 2105296/2105296 co-relation queries the response was YES. [2023-08-31 01:51:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297067 conditions, 16682 events. 8219/16682 cut-off events. For 2105296/2105296 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 163395 event pairs, 245 based on Foata normal form. 36/16718 useless extension candidates. Maximal degree in co-relation 296784. Up to 6338 conditions per place. [2023-08-31 01:51:07,972 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1753 selfloop transitions, 1497 changer transitions 5/3255 dead transitions. [2023-08-31 01:51:07,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 3255 transitions, 148349 flow [2023-08-31 01:51:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 01:51:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 01:51:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6098 transitions. [2023-08-31 01:51:07,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228848821081831 [2023-08-31 01:51:07,975 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6098 transitions. [2023-08-31 01:51:07,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6098 transitions. [2023-08-31 01:51:07,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:51:07,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6098 transitions. [2023-08-31 01:51:07,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 174.22857142857143) internal successors, (6098), 35 states have internal predecessors, (6098), 0 states have call successors, (0), 0 states 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 01:51:07,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states 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 01:51:07,985 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states 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 01:51:07,985 INFO L175 Difference]: Start difference. First operand has 864 places, 2968 transitions, 130690 flow. Second operand 35 states and 6098 transitions. [2023-08-31 01:51:07,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 3255 transitions, 148349 flow Killed by 15