./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.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 e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:47:33,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:47:33,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:47:33,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:47:33,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:47:33,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:47:33,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:47:33,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:47:33,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:47:33,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:47:33,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:47:33,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:47:33,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:47:33,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:47:33,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:47:33,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:47:33,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:47:33,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:47:33,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:47:33,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:47:33,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:47:33,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:47:33,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:47:33,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:47:33,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:47:33,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:47:33,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:47:33,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:47:33,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:47:33,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:47:33,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:47:33,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:47:33,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:47:33,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:47:33,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:47:33,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:47:33,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:47:33,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:47:33,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:47:33,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:47:33,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:47:33,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:47:33,798 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:47:33,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:47:33,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:47:33,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:47:33,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:47:33,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:47:33,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:47:33,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:47:33,801 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:47:33,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:47:33,802 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:47:33,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:47:33,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:47:33,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:47:33,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:47:33,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:47:33,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:47:33,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:47:33,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:47:33,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:47:33,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:47:33,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:47:33,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:47:33,806 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:47:33,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9065224c0b163ad014fc0aee4009feab43ed37ef70e06d8d8f3b14d045f755a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:47:34,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:47:34,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:47:34,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:47:34,105 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:47:34,106 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:47:34,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-09-01 11:47:35,300 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:47:35,486 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:47:35,486 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2023-09-01 11:47:35,506 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd602fe6/aeefe117fe9543a2823bcba3cb21e08c/FLAG22ad5775e [2023-09-01 11:47:35,525 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd602fe6/aeefe117fe9543a2823bcba3cb21e08c [2023-09-01 11:47:35,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:47:35,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:47:35,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:47:35,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:47:35,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:47:35,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3767dbae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35, skipping insertion in model container [2023-09-01 11:47:35,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:47:35,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:47:35,729 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-09-01 11:47:35,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:47:35,748 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:47:35,784 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2566,2579] [2023-09-01 11:47:35,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:47:35,801 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:47:35,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35 WrapperNode [2023-09-01 11:47:35,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:47:35,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:47:35,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:47:35,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:47:35,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,851 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 178 [2023-09-01 11:47:35,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:47:35,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:47:35,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:47:35,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:47:35,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:47:35,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:47:35,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:47:35,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:47:35,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:47:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:35,904 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) [2023-09-01 11:47:35,921 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 [2023-09-01 11:47:35,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:47:35,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:47:35,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:47:35,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:47:35,935 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:47:35,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:47:35,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:47:35,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:47:35,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:47:35,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:47:35,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:47:35,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:47:35,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:47:35,937 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:47:36,009 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:47:36,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:47:36,269 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:47:36,275 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:47:36,276 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 11:47:36,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:47:36 BoogieIcfgContainer [2023-09-01 11:47:36,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:47:36,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:47:36,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:47:36,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:47:36,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:47:35" (1/3) ... [2023-09-01 11:47:36,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1617ddfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:47:36, skipping insertion in model container [2023-09-01 11:47:36,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (2/3) ... [2023-09-01 11:47:36,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1617ddfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:47:36, skipping insertion in model container [2023-09-01 11:47:36,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:47:36" (3/3) ... [2023-09-01 11:47:36,283 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2023-09-01 11:47:36,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:47:36,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:47:36,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:47:36,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:47:36,409 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:47:36,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 199 transitions, 414 flow [2023-09-01 11:47:36,501 INFO L130 PetriNetUnfolder]: 19/197 cut-off events. [2023-09-01 11:47:36,501 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:47:36,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 19/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 225 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2023-09-01 11:47:36,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 199 transitions, 414 flow [2023-09-01 11:47:36,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 189 transitions, 390 flow [2023-09-01 11:47:36,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:47:36,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 189 transitions, 390 flow [2023-09-01 11:47:36,535 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 189 transitions, 390 flow [2023-09-01 11:47:36,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 189 transitions, 390 flow [2023-09-01 11:47:36,596 INFO L130 PetriNetUnfolder]: 19/189 cut-off events. [2023-09-01 11:47:36,596 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:47:36,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 19/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 223 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2023-09-01 11:47:36,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 3332 [2023-09-01 11:47:40,731 INFO L134 LiptonReduction]: Checked pairs total: 3976 [2023-09-01 11:47:40,731 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-09-01 11:47:40,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:47:40,761 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;@223e1485, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:47:40,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 11:47:40,771 INFO L130 PetriNetUnfolder]: 6/24 cut-off events. [2023-09-01 11:47:40,775 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:47:40,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:40,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:40,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:40,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1174210109, now seen corresponding path program 1 times [2023-09-01 11:47:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:40,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802492566] [2023-09-01 11:47:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:41,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802492566] [2023-09-01 11:47:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802492566] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:41,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:41,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:47:41,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041736129] [2023-09-01 11:47:41,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:41,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:47:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:47:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:47:41,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 410 [2023-09-01 11:47:41,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:41,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 410 [2023-09-01 11:47:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:41,321 INFO L130 PetriNetUnfolder]: 91/155 cut-off events. [2023-09-01 11:47:41,321 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 11:47:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 155 events. 91/155 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 377 event pairs, 51 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 275. Up to 151 conditions per place. [2023-09-01 11:47:41,324 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 22 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-09-01 11:47:41,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 118 flow [2023-09-01 11:47:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:47:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:47:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-09-01 11:47:41,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44959349593495934 [2023-09-01 11:47:41,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-09-01 11:47:41,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-09-01 11:47:41,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:41,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-09-01 11:47:41,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 410.0) internal successors, (1640), 4 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,358 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 553 transitions. [2023-09-01 11:47:41,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 118 flow [2023-09-01 11:47:41,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:41,362 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 76 flow [2023-09-01 11:47:41,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2023-09-01 11:47:41,367 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-09-01 11:47:41,367 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 76 flow [2023-09-01 11:47:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:41,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:41,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:47:41,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:41,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:41,375 INFO L85 PathProgramCache]: Analyzing trace with hash 505710322, now seen corresponding path program 1 times [2023-09-01 11:47:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525859052] [2023-09-01 11:47:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:41,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:41,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:41,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525859052] [2023-09-01 11:47:41,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525859052] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887256194] [2023-09-01 11:47:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:41,560 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) [2023-09-01 11:47:41,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:47:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:41,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 11:47:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:41,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:47:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887256194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:41,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-09-01 11:47:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595489188] [2023-09-01 11:47:41,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:41,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:47:41,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:47:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:41,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 410 [2023-09-01 11:47:41,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:41,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 410 [2023-09-01 11:47:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:41,900 INFO L130 PetriNetUnfolder]: 91/161 cut-off events. [2023-09-01 11:47:41,900 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:47:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 161 events. 91/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 378 event pairs, 51 based on Foata normal form. 3/123 useless extension candidates. Maximal degree in co-relation 315. Up to 151 conditions per place. [2023-09-01 11:47:41,903 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 22 selfloop transitions, 10 changer transitions 0/33 dead transitions. [2023-09-01 11:47:41,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 164 flow [2023-09-01 11:47:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:47:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:47:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1064 transitions. [2023-09-01 11:47:41,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432520325203252 [2023-09-01 11:47:41,905 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1064 transitions. [2023-09-01 11:47:41,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1064 transitions. [2023-09-01 11:47:41,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:41,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1064 transitions. [2023-09-01 11:47:41,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.33333333333334) internal successors, (1064), 6 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 410.0) internal successors, (2870), 7 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,912 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 76 flow. Second operand 6 states and 1064 transitions. [2023-09-01 11:47:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 164 flow [2023-09-01 11:47:41,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:41,913 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 138 flow [2023-09-01 11:47:41,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-09-01 11:47:41,914 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-09-01 11:47:41,914 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 138 flow [2023-09-01 11:47:41,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:41,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:41,915 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:41,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:42,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:42,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:42,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1388696397, now seen corresponding path program 2 times [2023-09-01 11:47:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:42,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867429634] [2023-09-01 11:47:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:42,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867429634] [2023-09-01 11:47:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867429634] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741243910] [2023-09-01 11:47:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:42,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:42,307 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) [2023-09-01 11:47:42,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:47:42,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:47:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:47:42,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741243910] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:42,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:42,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:47:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872843138] [2023-09-01 11:47:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:42,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:47:42,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:47:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:47:42,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 410 [2023-09-01 11:47:42,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:42,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:42,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 410 [2023-09-01 11:47:42,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:42,587 INFO L130 PetriNetUnfolder]: 173/320 cut-off events. [2023-09-01 11:47:42,588 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:47:42,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 320 events. 173/320 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1130 event pairs, 51 based on Foata normal form. 4/245 useless extension candidates. Maximal degree in co-relation 617. Up to 147 conditions per place. [2023-09-01 11:47:42,590 INFO L137 encePairwiseOnDemand]: 404/410 looper letters, 51 selfloop transitions, 5 changer transitions 2/59 dead transitions. [2023-09-01 11:47:42,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 312 flow [2023-09-01 11:47:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 936 transitions. [2023-09-01 11:47:42,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45658536585365855 [2023-09-01 11:47:42,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 936 transitions. [2023-09-01 11:47:42,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 936 transitions. [2023-09-01 11:47:42,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:42,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 936 transitions. [2023-09-01 11:47:42,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.2) internal successors, (936), 5 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:42,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:42,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 410.0) internal successors, (2460), 6 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:42,600 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 138 flow. Second operand 5 states and 936 transitions. [2023-09-01 11:47:42,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 312 flow [2023-09-01 11:47:42,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 296 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:42,603 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 146 flow [2023-09-01 11:47:42,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-09-01 11:47:42,604 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2023-09-01 11:47:42,604 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 146 flow [2023-09-01 11:47:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:42,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:42,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 11:47:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:47:42,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:42,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -860076919, now seen corresponding path program 3 times [2023-09-01 11:47:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738321074] [2023-09-01 11:47:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738321074] [2023-09-01 11:47:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738321074] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71885821] [2023-09-01 11:47:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:42,989 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) [2023-09-01 11:47:43,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:47:43,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:47:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:47:43,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71885821] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:43,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:47:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661574593] [2023-09-01 11:47:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:47:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:47:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:47:43,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 410 [2023-09-01 11:47:43,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:43,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 410 [2023-09-01 11:47:43,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:43,249 INFO L130 PetriNetUnfolder]: 211/384 cut-off events. [2023-09-01 11:47:43,249 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-09-01 11:47:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 384 events. 211/384 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1371 event pairs, 50 based on Foata normal form. 4/325 useless extension candidates. Maximal degree in co-relation 836. Up to 271 conditions per place. [2023-09-01 11:47:43,251 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 49 selfloop transitions, 4 changer transitions 3/57 dead transitions. [2023-09-01 11:47:43,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 318 flow [2023-09-01 11:47:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:47:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:47:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 755 transitions. [2023-09-01 11:47:43,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2023-09-01 11:47:43,254 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 755 transitions. [2023-09-01 11:47:43,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 755 transitions. [2023-09-01 11:47:43,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:43,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 755 transitions. [2023-09-01 11:47:43,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,259 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 146 flow. Second operand 4 states and 755 transitions. [2023-09-01 11:47:43,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 318 flow [2023-09-01 11:47:43,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 11:47:43,262 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 180 flow [2023-09-01 11:47:43,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-09-01 11:47:43,263 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-09-01 11:47:43,263 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 180 flow [2023-09-01 11:47:43,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:43,264 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:43,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:43,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:43,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2094169333, now seen corresponding path program 4 times [2023-09-01 11:47:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254217873] [2023-09-01 11:47:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:43,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:43,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254217873] [2023-09-01 11:47:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254217873] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175069913] [2023-09-01 11:47:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:43,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:43,631 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) [2023-09-01 11:47:43,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:47:43,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:43,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:47:43,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:43,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175069913] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:43,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:43,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:47:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112635892] [2023-09-01 11:47:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:47:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:47:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:47:43,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 410 [2023-09-01 11:47:43,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:43,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 410 [2023-09-01 11:47:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:43,835 INFO L130 PetriNetUnfolder]: 201/364 cut-off events. [2023-09-01 11:47:43,835 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-09-01 11:47:43,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 364 events. 201/364 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1272 event pairs, 53 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 861. Up to 163 conditions per place. [2023-09-01 11:47:43,836 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 52 selfloop transitions, 7 changer transitions 3/63 dead transitions. [2023-09-01 11:47:43,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 371 flow [2023-09-01 11:47:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:47:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:47:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-09-01 11:47:43,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628048780487805 [2023-09-01 11:47:43,838 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-09-01 11:47:43,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-09-01 11:47:43,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:43,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-09-01 11:47:43,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 410.0) internal successors, (2050), 5 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,842 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 180 flow. Second operand 4 states and 759 transitions. [2023-09-01 11:47:43,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 371 flow [2023-09-01 11:47:43,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 367 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 11:47:43,846 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 205 flow [2023-09-01 11:47:43,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-09-01 11:47:43,848 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-09-01 11:47:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 205 flow [2023-09-01 11:47:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:43,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:43,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:44,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:44,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1210593385, now seen corresponding path program 1 times [2023-09-01 11:47:44,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:44,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221893377] [2023-09-01 11:47:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:44,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:44,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221893377] [2023-09-01 11:47:44,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221893377] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:44,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770979233] [2023-09-01 11:47:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:44,154 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) [2023-09-01 11:47:44,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:47:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:47:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:47:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770979233] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:44,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:44,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-09-01 11:47:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046880473] [2023-09-01 11:47:44,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:47:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:47:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:47:44,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 410 [2023-09-01 11:47:44,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 205 flow. Second operand has 17 states, 17 states have (on average 173.0) internal successors, (2941), 17 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:44,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:44,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 410 [2023-09-01 11:47:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:44,603 INFO L130 PetriNetUnfolder]: 198/356 cut-off events. [2023-09-01 11:47:44,603 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-09-01 11:47:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 356 events. 198/356 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1206 event pairs, 114 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 861. Up to 332 conditions per place. [2023-09-01 11:47:44,604 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 29 selfloop transitions, 12 changer transitions 0/42 dead transitions. [2023-09-01 11:47:44,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 299 flow [2023-09-01 11:47:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:47:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:47:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1233 transitions. [2023-09-01 11:47:44,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961672473867596 [2023-09-01 11:47:44,607 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1233 transitions. [2023-09-01 11:47:44,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1233 transitions. [2023-09-01 11:47:44,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:44,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1233 transitions. [2023-09-01 11:47:44,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.14285714285714) internal successors, (1233), 7 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:44,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:44,612 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:44,612 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 205 flow. Second operand 7 states and 1233 transitions. [2023-09-01 11:47:44,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 299 flow [2023-09-01 11:47:44,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 287 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 11:47:44,614 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 239 flow [2023-09-01 11:47:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-09-01 11:47:44,614 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-09-01 11:47:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 239 flow [2023-09-01 11:47:44,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 173.0) internal successors, (2941), 17 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:44,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:44,615 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:44,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:44,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:44,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:44,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 269385230, now seen corresponding path program 2 times [2023-09-01 11:47:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:44,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692282193] [2023-09-01 11:47:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692282193] [2023-09-01 11:47:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692282193] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262950981] [2023-09-01 11:47:45,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:45,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:45,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:45,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:46,252 INFO L130 PetriNetUnfolder]: 269/495 cut-off events. [2023-09-01 11:47:46,252 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-09-01 11:47:46,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 495 events. 269/495 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1946 event pairs, 33 based on Foata normal form. 13/423 useless extension candidates. Maximal degree in co-relation 1143. Up to 116 conditions per place. [2023-09-01 11:47:46,254 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 88 selfloop transitions, 28 changer transitions 10/127 dead transitions. [2023-09-01 11:47:46,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 127 transitions, 725 flow [2023-09-01 11:47:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:47:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:47:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2127 transitions. [2023-09-01 11:47:46,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39906191369606003 [2023-09-01 11:47:46,259 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2127 transitions. [2023-09-01 11:47:46,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2127 transitions. [2023-09-01 11:47:46,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:46,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2127 transitions. [2023-09-01 11:47:46,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 163.6153846153846) internal successors, (2127), 13 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,268 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,268 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 239 flow. Second operand 13 states and 2127 transitions. [2023-09-01 11:47:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 127 transitions, 725 flow [2023-09-01 11:47:46,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 127 transitions, 701 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:46,271 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 423 flow [2023-09-01 11:47:46,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=423, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-09-01 11:47:46,272 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2023-09-01 11:47:46,274 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 423 flow [2023-09-01 11:47:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:46,275 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 11:47:46,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:46,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1843151562, now seen corresponding path program 3 times [2023-09-01 11:47:46,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:46,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930499038] [2023-09-01 11:47:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:47:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:47,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930499038] [2023-09-01 11:47:47,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930499038] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:47,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211190550] [2023-09-01 11:47:47,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:47,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:47,271 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) [2023-09-01 11:47:47,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:47:47,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:47:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 11:47:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:47,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:47,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211190550] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:47,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:47,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2023-09-01 11:47:47,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522332950] [2023-09-01 11:47:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:47,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:47:48,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:48,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 423 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:48,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:48,323 INFO L130 PetriNetUnfolder]: 280/516 cut-off events. [2023-09-01 11:47:48,324 INFO L131 PetriNetUnfolder]: For 646/648 co-relation queries the response was YES. [2023-09-01 11:47:48,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 516 events. 280/516 cut-off events. For 646/648 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2033 event pairs, 45 based on Foata normal form. 9/525 useless extension candidates. Maximal degree in co-relation 1691. Up to 157 conditions per place. [2023-09-01 11:47:48,327 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 73 selfloop transitions, 24 changer transitions 9/107 dead transitions. [2023-09-01 11:47:48,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 793 flow [2023-09-01 11:47:48,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:47:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:47:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1473 transitions. [2023-09-01 11:47:48,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991869918699187 [2023-09-01 11:47:48,330 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1473 transitions. [2023-09-01 11:47:48,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1473 transitions. [2023-09-01 11:47:48,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:48,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1473 transitions. [2023-09-01 11:47:48,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.66666666666666) internal successors, (1473), 9 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,336 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,336 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 423 flow. Second operand 9 states and 1473 transitions. [2023-09-01 11:47:48,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 793 flow [2023-09-01 11:47:48,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 782 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 11:47:48,340 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 525 flow [2023-09-01 11:47:48,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=525, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-09-01 11:47:48,341 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2023-09-01 11:47:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 525 flow [2023-09-01 11:47:48,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:48,342 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:48,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:48,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:48,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:48,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1894417440, now seen corresponding path program 4 times [2023-09-01 11:47:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102148975] [2023-09-01 11:47:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:47:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102148975] [2023-09-01 11:47:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102148975] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103292760] [2023-09-01 11:47:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:49,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:49,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:49,543 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) [2023-09-01 11:47:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:47:49,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 11:47:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:49,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:49,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103292760] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:49,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:49,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 22 [2023-09-01 11:47:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015154409] [2023-09-01 11:47:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:49,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:47:49,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:47:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:47:49,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:47:49,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 161.375) internal successors, (1291), 8 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:49,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:47:49,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:50,210 INFO L130 PetriNetUnfolder]: 281/529 cut-off events. [2023-09-01 11:47:50,210 INFO L131 PetriNetUnfolder]: For 1201/1203 co-relation queries the response was YES. [2023-09-01 11:47:50,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 529 events. 281/529 cut-off events. For 1201/1203 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2180 event pairs, 65 based on Foata normal form. 9/538 useless extension candidates. Maximal degree in co-relation 2036. Up to 185 conditions per place. [2023-09-01 11:47:50,213 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 80 selfloop transitions, 23 changer transitions 6/110 dead transitions. [2023-09-01 11:47:50,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 898 flow [2023-09-01 11:47:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:47:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:47:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1348 transitions. [2023-09-01 11:47:50,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41097560975609754 [2023-09-01 11:47:50,216 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1348 transitions. [2023-09-01 11:47:50,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1348 transitions. [2023-09-01 11:47:50,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:50,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1348 transitions. [2023-09-01 11:47:50,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.5) internal successors, (1348), 8 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,221 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,221 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 525 flow. Second operand 8 states and 1348 transitions. [2023-09-01 11:47:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 898 flow [2023-09-01 11:47:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 854 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:50,237 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 577 flow [2023-09-01 11:47:50,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-09-01 11:47:50,238 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2023-09-01 11:47:50,238 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 577 flow [2023-09-01 11:47:50,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.375) internal successors, (1291), 8 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:50,239 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:50,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:50,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:50,444 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:50,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1075580716, now seen corresponding path program 5 times [2023-09-01 11:47:50,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:50,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426884845] [2023-09-01 11:47:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:50,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426884845] [2023-09-01 11:47:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426884845] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573022313] [2023-09-01 11:47:51,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:47:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:51,551 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) [2023-09-01 11:47:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:47:51,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:47:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:47:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:51,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573022313] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:51,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 29 [2023-09-01 11:47:51,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380710538] [2023-09-01 11:47:51,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:47:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:52,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 577 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:52,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:52,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:52,509 INFO L130 PetriNetUnfolder]: 277/513 cut-off events. [2023-09-01 11:47:52,510 INFO L131 PetriNetUnfolder]: For 1624/1626 co-relation queries the response was YES. [2023-09-01 11:47:52,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 513 events. 277/513 cut-off events. For 1624/1626 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2024 event pairs, 47 based on Foata normal form. 3/516 useless extension candidates. Maximal degree in co-relation 2086. Up to 157 conditions per place. [2023-09-01 11:47:52,512 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 74 selfloop transitions, 24 changer transitions 10/109 dead transitions. [2023-09-01 11:47:52,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 941 flow [2023-09-01 11:47:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:47:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:47:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2023-09-01 11:47:52,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3986449864498645 [2023-09-01 11:47:52,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2023-09-01 11:47:52,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2023-09-01 11:47:52,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:52,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2023-09-01 11:47:52,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,521 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,521 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 577 flow. Second operand 9 states and 1471 transitions. [2023-09-01 11:47:52,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 941 flow [2023-09-01 11:47:52,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 887 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-09-01 11:47:52,527 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 563 flow [2023-09-01 11:47:52,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=563, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-09-01 11:47:52,528 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2023-09-01 11:47:52,528 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 563 flow [2023-09-01 11:47:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:52,529 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:52,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:52,733 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,SelfDestructingSolverStorable9 [2023-09-01 11:47:52,734 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:52,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1130882794, now seen corresponding path program 6 times [2023-09-01 11:47:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:52,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869430741] [2023-09-01 11:47:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:52,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:53,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:53,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869430741] [2023-09-01 11:47:53,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869430741] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:53,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:53,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:53,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394314304] [2023-09-01 11:47:53,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:53,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:53,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:53,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:53,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:53,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 563 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:53,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:53,727 INFO L130 PetriNetUnfolder]: 278/522 cut-off events. [2023-09-01 11:47:53,727 INFO L131 PetriNetUnfolder]: For 1470/1472 co-relation queries the response was YES. [2023-09-01 11:47:53,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 522 events. 278/522 cut-off events. For 1470/1472 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2129 event pairs, 31 based on Foata normal form. 3/525 useless extension candidates. Maximal degree in co-relation 2097. Up to 144 conditions per place. [2023-09-01 11:47:53,730 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 89 selfloop transitions, 31 changer transitions 9/130 dead transitions. [2023-09-01 11:47:53,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1073 flow [2023-09-01 11:47:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:47:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:47:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2276 transitions. [2023-09-01 11:47:53,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965156794425087 [2023-09-01 11:47:53,734 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2276 transitions. [2023-09-01 11:47:53,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2276 transitions. [2023-09-01 11:47:53,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:53,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2276 transitions. [2023-09-01 11:47:53,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.57142857142858) internal successors, (2276), 14 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,743 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,743 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 563 flow. Second operand 14 states and 2276 transitions. [2023-09-01 11:47:53,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1073 flow [2023-09-01 11:47:53,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1028 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 11:47:53,748 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 586 flow [2023-09-01 11:47:53,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=586, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-09-01 11:47:53,749 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 59 predicate places. [2023-09-01 11:47:53,749 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 586 flow [2023-09-01 11:47:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:53,749 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 11:47:53,749 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:53,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 583298390, now seen corresponding path program 7 times [2023-09-01 11:47:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701460206] [2023-09-01 11:47:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:54,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701460206] [2023-09-01 11:47:54,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701460206] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:54,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:54,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:54,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030439917] [2023-09-01 11:47:54,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:54,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:54,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:54,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:54,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 410 [2023-09-01 11:47:54,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 586 flow. Second operand has 11 states, 11 states have (on average 158.72727272727272) internal successors, (1746), 11 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:54,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 410 [2023-09-01 11:47:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:54,671 INFO L130 PetriNetUnfolder]: 275/509 cut-off events. [2023-09-01 11:47:54,672 INFO L131 PetriNetUnfolder]: For 1531/1533 co-relation queries the response was YES. [2023-09-01 11:47:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 509 events. 275/509 cut-off events. For 1531/1533 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2012 event pairs, 31 based on Foata normal form. 3/512 useless extension candidates. Maximal degree in co-relation 2093. Up to 144 conditions per place. [2023-09-01 11:47:54,674 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 83 selfloop transitions, 30 changer transitions 7/121 dead transitions. [2023-09-01 11:47:54,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1042 flow [2023-09-01 11:47:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:47:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:47:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1981 transitions. [2023-09-01 11:47:54,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40264227642276423 [2023-09-01 11:47:54,678 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1981 transitions. [2023-09-01 11:47:54,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1981 transitions. [2023-09-01 11:47:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1981 transitions. [2023-09-01 11:47:54,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.08333333333334) internal successors, (1981), 12 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,686 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,686 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 586 flow. Second operand 12 states and 1981 transitions. [2023-09-01 11:47:54,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1042 flow [2023-09-01 11:47:54,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 946 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-09-01 11:47:54,716 INFO L231 Difference]: Finished difference. Result has 82 places, 71 transitions, 559 flow [2023-09-01 11:47:54,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=559, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2023-09-01 11:47:54,717 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2023-09-01 11:47:54,717 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 559 flow [2023-09-01 11:47:54,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 158.72727272727272) internal successors, (1746), 11 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:54,718 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:47:54,718 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:54,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1827664836, now seen corresponding path program 8 times [2023-09-01 11:47:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:54,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925763159] [2023-09-01 11:47:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:47:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925763159] [2023-09-01 11:47:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925763159] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819099723] [2023-09-01 11:47:55,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:55,489 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) [2023-09-01 11:47:55,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:47:55,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:47:55,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:47:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:55,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:55,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819099723] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:55,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:55,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2023-09-01 11:47:55,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381223940] [2023-09-01 11:47:55,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:55,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:47:56,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:56,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 559 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:56,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:56,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:56,508 INFO L130 PetriNetUnfolder]: 321/579 cut-off events. [2023-09-01 11:47:56,508 INFO L131 PetriNetUnfolder]: For 1457/1457 co-relation queries the response was YES. [2023-09-01 11:47:56,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 579 events. 321/579 cut-off events. For 1457/1457 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2339 event pairs, 44 based on Foata normal form. 7/585 useless extension candidates. Maximal degree in co-relation 2277. Up to 182 conditions per place. [2023-09-01 11:47:56,512 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 82 selfloop transitions, 27 changer transitions 9/119 dead transitions. [2023-09-01 11:47:56,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1040 flow [2023-09-01 11:47:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:47:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:47:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1475 transitions. [2023-09-01 11:47:56,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997289972899729 [2023-09-01 11:47:56,516 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1475 transitions. [2023-09-01 11:47:56,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1475 transitions. [2023-09-01 11:47:56,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:56,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1475 transitions. [2023-09-01 11:47:56,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.88888888888889) internal successors, (1475), 9 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,522 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,522 INFO L175 Difference]: Start difference. First operand has 82 places, 71 transitions, 559 flow. Second operand 9 states and 1475 transitions. [2023-09-01 11:47:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1040 flow [2023-09-01 11:47:56,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 958 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 11:47:56,528 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 689 flow [2023-09-01 11:47:56,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=689, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-09-01 11:47:56,529 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2023-09-01 11:47:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 689 flow [2023-09-01 11:47:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:56,529 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:56,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:56,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 11:47:56,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:56,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1146369520, now seen corresponding path program 9 times [2023-09-01 11:47:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:56,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237737269] [2023-09-01 11:47:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237737269] [2023-09-01 11:47:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237737269] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:57,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548868898] [2023-09-01 11:47:57,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:57,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:47:57,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 689 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:57,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:47:57,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:57,712 INFO L130 PetriNetUnfolder]: 328/606 cut-off events. [2023-09-01 11:47:57,713 INFO L131 PetriNetUnfolder]: For 2566/2568 co-relation queries the response was YES. [2023-09-01 11:47:57,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 606 events. 328/606 cut-off events. For 2566/2568 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2561 event pairs, 38 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 2721. Up to 162 conditions per place. [2023-09-01 11:47:57,716 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 106 selfloop transitions, 34 changer transitions 9/150 dead transitions. [2023-09-01 11:47:57,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1312 flow [2023-09-01 11:47:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:47:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:47:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2285 transitions. [2023-09-01 11:47:57,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980836236933798 [2023-09-01 11:47:57,719 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2285 transitions. [2023-09-01 11:47:57,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2285 transitions. [2023-09-01 11:47:57,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:57,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2285 transitions. [2023-09-01 11:47:57,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.21428571428572) internal successors, (2285), 14 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,727 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,727 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 689 flow. Second operand 14 states and 2285 transitions. [2023-09-01 11:47:57,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1312 flow [2023-09-01 11:47:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1255 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:57,735 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 774 flow [2023-09-01 11:47:57,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=774, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2023-09-01 11:47:57,736 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-09-01 11:47:57,736 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 774 flow [2023-09-01 11:47:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:57,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:57,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 11:47:57,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:57,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash 567811664, now seen corresponding path program 10 times [2023-09-01 11:47:57,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:57,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252037062] [2023-09-01 11:47:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:58,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252037062] [2023-09-01 11:47:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252037062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:58,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:58,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:58,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122853204] [2023-09-01 11:47:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:58,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:47:58,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 774 flow. Second operand has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:58,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:47:58,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:58,681 INFO L130 PetriNetUnfolder]: 329/613 cut-off events. [2023-09-01 11:47:58,682 INFO L131 PetriNetUnfolder]: For 2565/2567 co-relation queries the response was YES. [2023-09-01 11:47:58,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2771 conditions, 613 events. 329/613 cut-off events. For 2565/2567 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2653 event pairs, 44 based on Foata normal form. 1/614 useless extension candidates. Maximal degree in co-relation 2717. Up to 212 conditions per place. [2023-09-01 11:47:58,686 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 87 selfloop transitions, 28 changer transitions 7/123 dead transitions. [2023-09-01 11:47:58,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 1168 flow [2023-09-01 11:47:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:47:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:47:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1480 transitions. [2023-09-01 11:47:58,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2023-09-01 11:47:58,690 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1480 transitions. [2023-09-01 11:47:58,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1480 transitions. [2023-09-01 11:47:58,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:58,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1480 transitions. [2023-09-01 11:47:58,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.44444444444446) internal successors, (1480), 9 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,694 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,695 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 774 flow. Second operand 9 states and 1480 transitions. [2023-09-01 11:47:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 1168 flow [2023-09-01 11:47:58,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 123 transitions, 1123 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-09-01 11:47:58,702 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 811 flow [2023-09-01 11:47:58,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=811, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-09-01 11:47:58,703 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-09-01 11:47:58,703 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 811 flow [2023-09-01 11:47:58,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:58,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:58,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 11:47:58,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:58,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -132681324, now seen corresponding path program 11 times [2023-09-01 11:47:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:58,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632921424] [2023-09-01 11:47:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:47:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:59,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632921424] [2023-09-01 11:47:59,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632921424] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:59,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:47:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957999265] [2023-09-01 11:47:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:59,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:47:59,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:47:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:59,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:47:59,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 811 flow. Second operand has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:59,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:47:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:59,761 INFO L130 PetriNetUnfolder]: 327/601 cut-off events. [2023-09-01 11:47:59,761 INFO L131 PetriNetUnfolder]: For 2391/2393 co-relation queries the response was YES. [2023-09-01 11:47:59,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 601 events. 327/601 cut-off events. For 2391/2393 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2543 event pairs, 42 based on Foata normal form. 1/602 useless extension candidates. Maximal degree in co-relation 2651. Up to 162 conditions per place. [2023-09-01 11:47:59,765 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 103 selfloop transitions, 32 changer transitions 7/143 dead transitions. [2023-09-01 11:47:59,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 143 transitions, 1325 flow [2023-09-01 11:47:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:47:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:47:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1976 transitions. [2023-09-01 11:47:59,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016260162601626 [2023-09-01 11:47:59,768 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1976 transitions. [2023-09-01 11:47:59,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1976 transitions. [2023-09-01 11:47:59,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:59,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1976 transitions. [2023-09-01 11:47:59,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.66666666666666) internal successors, (1976), 12 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,774 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,774 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 811 flow. Second operand 12 states and 1976 transitions. [2023-09-01 11:47:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 143 transitions, 1325 flow [2023-09-01 11:47:59,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 1261 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-09-01 11:47:59,782 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 810 flow [2023-09-01 11:47:59,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=810, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2023-09-01 11:47:59,782 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2023-09-01 11:47:59,782 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 810 flow [2023-09-01 11:47:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:59,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:59,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 11:47:59,783 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:47:59,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1819505128, now seen corresponding path program 12 times [2023-09-01 11:47:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:59,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708460169] [2023-09-01 11:47:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:59,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:48:01,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708460169] [2023-09-01 11:48:01,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708460169] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285099369] [2023-09-01 11:48:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:48:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:01,053 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) [2023-09-01 11:48:01,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:48:01,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:48:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:01,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:48:01,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:48:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:48:01,537 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:48:01,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-09-01 11:48:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:01,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:01,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285099369] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:01,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:01,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20] total 28 [2023-09-01 11:48:01,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349389290] [2023-09-01 11:48:01,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:01,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:01,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:48:02,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:48:02,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 810 flow. Second operand has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:02,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:02,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:48:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:02,659 INFO L130 PetriNetUnfolder]: 361/669 cut-off events. [2023-09-01 11:48:02,660 INFO L131 PetriNetUnfolder]: For 2976/2978 co-relation queries the response was YES. [2023-09-01 11:48:02,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3025 conditions, 669 events. 361/669 cut-off events. For 2976/2978 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2944 event pairs, 42 based on Foata normal form. 18/687 useless extension candidates. Maximal degree in co-relation 2976. Up to 222 conditions per place. [2023-09-01 11:48:02,664 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 100 selfloop transitions, 36 changer transitions 6/143 dead transitions. [2023-09-01 11:48:02,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 143 transitions, 1446 flow [2023-09-01 11:48:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1452 transitions. [2023-09-01 11:48:02,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934959349593496 [2023-09-01 11:48:02,666 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1452 transitions. [2023-09-01 11:48:02,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1452 transitions. [2023-09-01 11:48:02,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:02,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1452 transitions. [2023-09-01 11:48:02,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.33333333333334) internal successors, (1452), 9 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,672 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,672 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 810 flow. Second operand 9 states and 1452 transitions. [2023-09-01 11:48:02,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 143 transitions, 1446 flow [2023-09-01 11:48:02,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1330 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-09-01 11:48:02,681 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 958 flow [2023-09-01 11:48:02,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-09-01 11:48:02,681 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 70 predicate places. [2023-09-01 11:48:02,681 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 958 flow [2023-09-01 11:48:02,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:02,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:02,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:02,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:02,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 11:48:02,885 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:02,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 966752974, now seen corresponding path program 13 times [2023-09-01 11:48:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:02,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787508960] [2023-09-01 11:48:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:48:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787508960] [2023-09-01 11:48:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787508960] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267911326] [2023-09-01 11:48:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:48:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:03,691 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) [2023-09-01 11:48:03,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:48:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 11:48:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:04,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:48:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:48:04,107 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:48:04,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-09-01 11:48:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:04,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:04,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267911326] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:04,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:04,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2023-09-01 11:48:04,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313187057] [2023-09-01 11:48:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:04,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:48:04,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:48:04,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 958 flow. Second operand has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:04,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:04,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:48:04,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:05,189 INFO L130 PetriNetUnfolder]: 361/671 cut-off events. [2023-09-01 11:48:05,190 INFO L131 PetriNetUnfolder]: For 3044/3046 co-relation queries the response was YES. [2023-09-01 11:48:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 671 events. 361/671 cut-off events. For 3044/3046 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2947 event pairs, 41 based on Foata normal form. 1/672 useless extension candidates. Maximal degree in co-relation 3110. Up to 231 conditions per place. [2023-09-01 11:48:05,194 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 90 selfloop transitions, 37 changer transitions 11/139 dead transitions. [2023-09-01 11:48:05,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1438 flow [2023-09-01 11:48:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1447 transitions. [2023-09-01 11:48:05,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921409214092141 [2023-09-01 11:48:05,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1447 transitions. [2023-09-01 11:48:05,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1447 transitions. [2023-09-01 11:48:05,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:05,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1447 transitions. [2023-09-01 11:48:05,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.77777777777777) internal successors, (1447), 9 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,204 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,204 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 958 flow. Second operand 9 states and 1447 transitions. [2023-09-01 11:48:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1438 flow [2023-09-01 11:48:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 139 transitions, 1394 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-09-01 11:48:05,216 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 995 flow [2023-09-01 11:48:05,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2023-09-01 11:48:05,217 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 75 predicate places. [2023-09-01 11:48:05,217 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 995 flow [2023-09-01 11:48:05,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:05,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:05,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:05,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 11:48:05,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 11:48:05,423 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:05,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -852520374, now seen corresponding path program 14 times [2023-09-01 11:48:05,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:05,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626150424] [2023-09-01 11:48:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626150424] [2023-09-01 11:48:05,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626150424] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:05,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:48:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998182290] [2023-09-01 11:48:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:48:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:48:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:48:06,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:06,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 995 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:06,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:06,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:06,486 INFO L130 PetriNetUnfolder]: 452/837 cut-off events. [2023-09-01 11:48:06,486 INFO L131 PetriNetUnfolder]: For 4204/4206 co-relation queries the response was YES. [2023-09-01 11:48:06,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 837 events. 452/837 cut-off events. For 4204/4206 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3861 event pairs, 63 based on Foata normal form. 7/843 useless extension candidates. Maximal degree in co-relation 3873. Up to 259 conditions per place. [2023-09-01 11:48:06,491 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 124 selfloop transitions, 52 changer transitions 6/183 dead transitions. [2023-09-01 11:48:06,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 1903 flow [2023-09-01 11:48:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:48:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:48:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2282 transitions. [2023-09-01 11:48:06,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2023-09-01 11:48:06,494 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2282 transitions. [2023-09-01 11:48:06,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2282 transitions. [2023-09-01 11:48:06,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:06,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2282 transitions. [2023-09-01 11:48:06,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,521 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,521 INFO L175 Difference]: Start difference. First operand has 101 places, 98 transitions, 995 flow. Second operand 14 states and 2282 transitions. [2023-09-01 11:48:06,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 1903 flow [2023-09-01 11:48:06,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1812 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 11:48:06,532 INFO L231 Difference]: Finished difference. Result has 116 places, 122 transitions, 1387 flow [2023-09-01 11:48:06,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1387, PETRI_PLACES=116, PETRI_TRANSITIONS=122} [2023-09-01 11:48:06,532 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 90 predicate places. [2023-09-01 11:48:06,532 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 1387 flow [2023-09-01 11:48:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:06,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:06,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 11:48:06,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:06,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash 683574298, now seen corresponding path program 15 times [2023-09-01 11:48:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529768203] [2023-09-01 11:48:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:07,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:07,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529768203] [2023-09-01 11:48:07,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529768203] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:07,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:07,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:07,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780089245] [2023-09-01 11:48:07,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:07,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:07,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:48:07,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 122 transitions, 1387 flow. Second operand has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:07,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:07,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:48:07,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:07,942 INFO L130 PetriNetUnfolder]: 448/834 cut-off events. [2023-09-01 11:48:07,943 INFO L131 PetriNetUnfolder]: For 4917/4919 co-relation queries the response was YES. [2023-09-01 11:48:07,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 834 events. 448/834 cut-off events. For 4917/4919 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3898 event pairs, 60 based on Foata normal form. 5/839 useless extension candidates. Maximal degree in co-relation 4140. Up to 154 conditions per place. [2023-09-01 11:48:07,948 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 99 selfloop transitions, 63 changer transitions 14/177 dead transitions. [2023-09-01 11:48:07,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 2026 flow [2023-09-01 11:48:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:48:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:48:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2079 transitions. [2023-09-01 11:48:07,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900562851782364 [2023-09-01 11:48:07,951 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2079 transitions. [2023-09-01 11:48:07,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2079 transitions. [2023-09-01 11:48:07,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:07,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2079 transitions. [2023-09-01 11:48:07,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,957 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,957 INFO L175 Difference]: Start difference. First operand has 116 places, 122 transitions, 1387 flow. Second operand 13 states and 2079 transitions. [2023-09-01 11:48:07,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 2026 flow [2023-09-01 11:48:07,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 177 transitions, 1942 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-09-01 11:48:07,971 INFO L231 Difference]: Finished difference. Result has 125 places, 121 transitions, 1455 flow [2023-09-01 11:48:07,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1455, PETRI_PLACES=125, PETRI_TRANSITIONS=121} [2023-09-01 11:48:07,972 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2023-09-01 11:48:07,972 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 121 transitions, 1455 flow [2023-09-01 11:48:07,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.58333333333334) internal successors, (1843), 12 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) [2023-09-01 11:48:07,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:07,972 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:07,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 11:48:07,973 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:07,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1934235582, now seen corresponding path program 16 times [2023-09-01 11:48:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:07,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996052642] [2023-09-01 11:48:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996052642] [2023-09-01 11:48:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996052642] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522481132] [2023-09-01 11:48:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:08,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:08,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:08,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 121 transitions, 1455 flow. Second operand has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:08,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:08,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:08,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:09,255 INFO L130 PetriNetUnfolder]: 435/823 cut-off events. [2023-09-01 11:48:09,255 INFO L131 PetriNetUnfolder]: For 5315/5317 co-relation queries the response was YES. [2023-09-01 11:48:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4168 conditions, 823 events. 435/823 cut-off events. For 5315/5317 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3911 event pairs, 54 based on Foata normal form. 7/830 useless extension candidates. Maximal degree in co-relation 4090. Up to 239 conditions per place. [2023-09-01 11:48:09,264 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 98 selfloop transitions, 72 changer transitions 6/177 dead transitions. [2023-09-01 11:48:09,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 177 transitions, 2065 flow [2023-09-01 11:48:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:48:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:48:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2403 transitions. [2023-09-01 11:48:09,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907317073170732 [2023-09-01 11:48:09,270 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2403 transitions. [2023-09-01 11:48:09,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2403 transitions. [2023-09-01 11:48:09,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:09,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2403 transitions. [2023-09-01 11:48:09,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.2) internal successors, (2403), 15 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:09,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 410.0) internal successors, (6560), 16 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:09,277 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 410.0) internal successors, (6560), 16 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:09,277 INFO L175 Difference]: Start difference. First operand has 125 places, 121 transitions, 1455 flow. Second operand 15 states and 2403 transitions. [2023-09-01 11:48:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 177 transitions, 2065 flow [2023-09-01 11:48:09,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 177 transitions, 1946 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-09-01 11:48:09,291 INFO L231 Difference]: Finished difference. Result has 131 places, 126 transitions, 1593 flow [2023-09-01 11:48:09,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1593, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2023-09-01 11:48:09,292 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2023-09-01 11:48:09,292 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 1593 flow [2023-09-01 11:48:09,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:09,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:09,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:09,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 11:48:09,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:09,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 472448766, now seen corresponding path program 17 times [2023-09-01 11:48:09,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:09,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796958615] [2023-09-01 11:48:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796958615] [2023-09-01 11:48:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796958615] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:09,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:48:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71548416] [2023-09-01 11:48:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:48:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:48:09,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:48:09,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:09,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 1593 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:09,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:09,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:09,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:10,216 INFO L130 PetriNetUnfolder]: 433/823 cut-off events. [2023-09-01 11:48:10,217 INFO L131 PetriNetUnfolder]: For 5232/5234 co-relation queries the response was YES. [2023-09-01 11:48:10,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4332 conditions, 823 events. 433/823 cut-off events. For 5232/5234 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3894 event pairs, 63 based on Foata normal form. 1/824 useless extension candidates. Maximal degree in co-relation 4251. Up to 263 conditions per place. [2023-09-01 11:48:10,222 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 125 selfloop transitions, 49 changer transitions 9/184 dead transitions. [2023-09-01 11:48:10,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 2195 flow [2023-09-01 11:48:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:48:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:48:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2279 transitions. [2023-09-01 11:48:10,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970383275261324 [2023-09-01 11:48:10,224 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2279 transitions. [2023-09-01 11:48:10,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2279 transitions. [2023-09-01 11:48:10,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:10,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2279 transitions. [2023-09-01 11:48:10,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.78571428571428) internal successors, (2279), 14 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:10,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:10,230 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:10,230 INFO L175 Difference]: Start difference. First operand has 131 places, 126 transitions, 1593 flow. Second operand 14 states and 2279 transitions. [2023-09-01 11:48:10,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 2195 flow [2023-09-01 11:48:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 184 transitions, 2072 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-09-01 11:48:10,246 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 1547 flow [2023-09-01 11:48:10,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1547, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2023-09-01 11:48:10,246 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 110 predicate places. [2023-09-01 11:48:10,246 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 1547 flow [2023-09-01 11:48:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:10,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:10,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:10,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 11:48:10,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:10,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1596096490, now seen corresponding path program 18 times [2023-09-01 11:48:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:10,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891002840] [2023-09-01 11:48:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:10,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:48:10,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891002840] [2023-09-01 11:48:10,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891002840] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711886067] [2023-09-01 11:48:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:48:10,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:10,864 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) [2023-09-01 11:48:10,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:48:10,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:48:10,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:48:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:11,296 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:48:11,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2023-09-01 11:48:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:11,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:11,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711886067] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:11,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:11,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2023-09-01 11:48:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299981408] [2023-09-01 11:48:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:48:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:48:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:48:11,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:11,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 1547 flow. Second operand has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:11,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:11,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:12,233 INFO L130 PetriNetUnfolder]: 437/841 cut-off events. [2023-09-01 11:48:12,233 INFO L131 PetriNetUnfolder]: For 5092/5094 co-relation queries the response was YES. [2023-09-01 11:48:12,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4400 conditions, 841 events. 437/841 cut-off events. For 5092/5094 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4085 event pairs, 71 based on Foata normal form. 1/842 useless extension candidates. Maximal degree in co-relation 4316. Up to 337 conditions per place. [2023-09-01 11:48:12,238 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 122 selfloop transitions, 45 changer transitions 7/175 dead transitions. [2023-09-01 11:48:12,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 175 transitions, 2163 flow [2023-09-01 11:48:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:48:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:48:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1630 transitions. [2023-09-01 11:48:12,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2023-09-01 11:48:12,240 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1630 transitions. [2023-09-01 11:48:12,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1630 transitions. [2023-09-01 11:48:12,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:12,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1630 transitions. [2023-09-01 11:48:12,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:12,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:12,244 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:12,244 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 1547 flow. Second operand 10 states and 1630 transitions. [2023-09-01 11:48:12,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 175 transitions, 2163 flow [2023-09-01 11:48:12,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 175 transitions, 2049 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-09-01 11:48:12,260 INFO L231 Difference]: Finished difference. Result has 134 places, 129 transitions, 1613 flow [2023-09-01 11:48:12,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1613, PETRI_PLACES=134, PETRI_TRANSITIONS=129} [2023-09-01 11:48:12,260 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 108 predicate places. [2023-09-01 11:48:12,260 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 129 transitions, 1613 flow [2023-09-01 11:48:12,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 156.72727272727272) internal successors, (1724), 11 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:12,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:12,261 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:12,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:12,465 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,SelfDestructingSolverStorable22 [2023-09-01 11:48:12,465 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:12,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1486136962, now seen corresponding path program 19 times [2023-09-01 11:48:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802534913] [2023-09-01 11:48:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:48:13,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802534913] [2023-09-01 11:48:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802534913] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003678502] [2023-09-01 11:48:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:48:13,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:13,052 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) [2023-09-01 11:48:13,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:48:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:13,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 11:48:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:13,466 INFO L321 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-09-01 11:48:13,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2023-09-01 11:48:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:13,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:13,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003678502] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:13,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:13,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2023-09-01 11:48:13,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319570448] [2023-09-01 11:48:13,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:13,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:48:13,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:13,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:48:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:48:13,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:48:13,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 129 transitions, 1613 flow. Second operand has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:13,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:13,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:48:13,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:14,299 INFO L130 PetriNetUnfolder]: 439/847 cut-off events. [2023-09-01 11:48:14,299 INFO L131 PetriNetUnfolder]: For 5256/5258 co-relation queries the response was YES. [2023-09-01 11:48:14,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 847 events. 439/847 cut-off events. For 5256/5258 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4137 event pairs, 71 based on Foata normal form. 1/848 useless extension candidates. Maximal degree in co-relation 4350. Up to 351 conditions per place. [2023-09-01 11:48:14,307 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 115 selfloop transitions, 45 changer transitions 7/168 dead transitions. [2023-09-01 11:48:14,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 2119 flow [2023-09-01 11:48:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1484 transitions. [2023-09-01 11:48:14,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021680216802168 [2023-09-01 11:48:14,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1484 transitions. [2023-09-01 11:48:14,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1484 transitions. [2023-09-01 11:48:14,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:14,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1484 transitions. [2023-09-01 11:48:14,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.88888888888889) internal successors, (1484), 9 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:14,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:14,314 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:14,314 INFO L175 Difference]: Start difference. First operand has 134 places, 129 transitions, 1613 flow. Second operand 9 states and 1484 transitions. [2023-09-01 11:48:14,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 2119 flow [2023-09-01 11:48:14,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 2094 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 11:48:14,332 INFO L231 Difference]: Finished difference. Result has 139 places, 130 transitions, 1707 flow [2023-09-01 11:48:14,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1707, PETRI_PLACES=139, PETRI_TRANSITIONS=130} [2023-09-01 11:48:14,333 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 113 predicate places. [2023-09-01 11:48:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 130 transitions, 1707 flow [2023-09-01 11:48:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.72727272727272) internal successors, (1735), 11 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:14,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:14,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:14,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 11:48:14,538 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,SelfDestructingSolverStorable23 [2023-09-01 11:48:14,538 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:14,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2108337346, now seen corresponding path program 20 times [2023-09-01 11:48:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614159124] [2023-09-01 11:48:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614159124] [2023-09-01 11:48:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614159124] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:48:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914464818] [2023-09-01 11:48:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:48:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:48:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:48:15,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 410 [2023-09-01 11:48:15,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 130 transitions, 1707 flow. Second operand has 11 states, 11 states have (on average 158.72727272727272) internal successors, (1746), 11 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:15,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:15,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 410 [2023-09-01 11:48:15,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:15,568 INFO L130 PetriNetUnfolder]: 461/873 cut-off events. [2023-09-01 11:48:15,568 INFO L131 PetriNetUnfolder]: For 6476/6478 co-relation queries the response was YES. [2023-09-01 11:48:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4756 conditions, 873 events. 461/873 cut-off events. For 6476/6478 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4190 event pairs, 63 based on Foata normal form. 1/874 useless extension candidates. Maximal degree in co-relation 4688. Up to 273 conditions per place. [2023-09-01 11:48:15,573 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 129 selfloop transitions, 61 changer transitions 7/198 dead transitions. [2023-09-01 11:48:15,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 198 transitions, 2467 flow [2023-09-01 11:48:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:48:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:48:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2629 transitions. [2023-09-01 11:48:15,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007621951219512 [2023-09-01 11:48:15,576 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2629 transitions. [2023-09-01 11:48:15,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2629 transitions. [2023-09-01 11:48:15,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:15,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2629 transitions. [2023-09-01 11:48:15,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 164.3125) internal successors, (2629), 16 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) [2023-09-01 11:48:15,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:15,581 INFO L175 Difference]: Start difference. First operand has 139 places, 130 transitions, 1707 flow. Second operand 16 states and 2629 transitions. [2023-09-01 11:48:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 198 transitions, 2467 flow [2023-09-01 11:48:15,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2362 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 11:48:15,599 INFO L231 Difference]: Finished difference. Result has 152 places, 138 transitions, 1893 flow [2023-09-01 11:48:15,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1893, PETRI_PLACES=152, PETRI_TRANSITIONS=138} [2023-09-01 11:48:15,599 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2023-09-01 11:48:15,600 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 138 transitions, 1893 flow [2023-09-01 11:48:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 158.72727272727272) internal successors, (1746), 11 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:15,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:15,600 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 11:48:15,600 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:15,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash 798304752, now seen corresponding path program 21 times [2023-09-01 11:48:15,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:15,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740405187] [2023-09-01 11:48:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740405187] [2023-09-01 11:48:15,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740405187] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:15,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458214441] [2023-09-01 11:48:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:15,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:15,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:15,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:16,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 138 transitions, 1893 flow. Second operand has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:16,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:16,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:16,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:16,855 INFO L130 PetriNetUnfolder]: 459/867 cut-off events. [2023-09-01 11:48:16,855 INFO L131 PetriNetUnfolder]: For 6814/6816 co-relation queries the response was YES. [2023-09-01 11:48:16,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 867 events. 459/867 cut-off events. For 6814/6816 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4168 event pairs, 52 based on Foata normal form. 1/868 useless extension candidates. Maximal degree in co-relation 4919. Up to 255 conditions per place. [2023-09-01 11:48:16,860 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 97 selfloop transitions, 77 changer transitions 8/183 dead transitions. [2023-09-01 11:48:16,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 183 transitions, 2440 flow [2023-09-01 11:48:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:48:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:48:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2395 transitions. [2023-09-01 11:48:16,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38943089430894307 [2023-09-01 11:48:16,869 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2395 transitions. [2023-09-01 11:48:16,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2395 transitions. [2023-09-01 11:48:16,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:16,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2395 transitions. [2023-09-01 11:48:16,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.66666666666666) internal successors, (2395), 15 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) [2023-09-01 11:48:16,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 410.0) internal successors, (6560), 16 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:16,879 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 410.0) internal successors, (6560), 16 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:16,879 INFO L175 Difference]: Start difference. First operand has 152 places, 138 transitions, 1893 flow. Second operand 15 states and 2395 transitions. [2023-09-01 11:48:16,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 183 transitions, 2440 flow [2023-09-01 11:48:16,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 183 transitions, 2360 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 11:48:16,898 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1936 flow [2023-09-01 11:48:16,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1936, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2023-09-01 11:48:16,899 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 128 predicate places. [2023-09-01 11:48:16,899 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1936 flow [2023-09-01 11:48:16,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:16,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:16,900 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:16,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 11:48:16,900 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:16,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash -646550530, now seen corresponding path program 22 times [2023-09-01 11:48:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:16,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020677246] [2023-09-01 11:48:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:16,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020677246] [2023-09-01 11:48:17,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020677246] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:17,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665809253] [2023-09-01 11:48:17,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:17,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:17,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:17,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:17,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1936 flow. Second operand has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:17,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:17,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:18,366 INFO L130 PetriNetUnfolder]: 454/854 cut-off events. [2023-09-01 11:48:18,367 INFO L131 PetriNetUnfolder]: For 6981/6983 co-relation queries the response was YES. [2023-09-01 11:48:18,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5064 conditions, 854 events. 454/854 cut-off events. For 6981/6983 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4002 event pairs, 16 based on Foata normal form. 1/855 useless extension candidates. Maximal degree in co-relation 4983. Up to 316 conditions per place. [2023-09-01 11:48:18,373 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 106 selfloop transitions, 67 changer transitions 7/181 dead transitions. [2023-09-01 11:48:18,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 181 transitions, 2528 flow [2023-09-01 11:48:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:48:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:48:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2080 transitions. [2023-09-01 11:48:18,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2023-09-01 11:48:18,376 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2080 transitions. [2023-09-01 11:48:18,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2080 transitions. [2023-09-01 11:48:18,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:18,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2080 transitions. [2023-09-01 11:48:18,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 160.0) internal successors, (2080), 13 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:18,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:18,382 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:18,383 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1936 flow. Second operand 13 states and 2080 transitions. [2023-09-01 11:48:18,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 181 transitions, 2528 flow [2023-09-01 11:48:18,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 181 transitions, 2330 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-09-01 11:48:18,409 INFO L231 Difference]: Finished difference. Result has 151 places, 139 transitions, 1931 flow [2023-09-01 11:48:18,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1931, PETRI_PLACES=151, PETRI_TRANSITIONS=139} [2023-09-01 11:48:18,409 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 125 predicate places. [2023-09-01 11:48:18,409 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 139 transitions, 1931 flow [2023-09-01 11:48:18,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 154.58333333333334) internal successors, (1855), 12 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:18,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:18,410 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:18,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 11:48:18,410 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:18,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash -840236614, now seen corresponding path program 1 times [2023-09-01 11:48:18,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:18,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619709923] [2023-09-01 11:48:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:18,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619709923] [2023-09-01 11:48:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619709923] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:48:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189590826] [2023-09-01 11:48:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:48:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:48:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:48:18,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:48:18,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 139 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:18,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:18,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:48:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:19,167 INFO L130 PetriNetUnfolder]: 474/891 cut-off events. [2023-09-01 11:48:19,167 INFO L131 PetriNetUnfolder]: For 7451/7451 co-relation queries the response was YES. [2023-09-01 11:48:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 891 events. 474/891 cut-off events. For 7451/7451 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4292 event pairs, 96 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 5261. Up to 396 conditions per place. [2023-09-01 11:48:19,175 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 123 selfloop transitions, 55 changer transitions 0/179 dead transitions. [2023-09-01 11:48:19,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 179 transitions, 2684 flow [2023-09-01 11:48:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1556 transitions. [2023-09-01 11:48:19,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421680216802168 [2023-09-01 11:48:19,177 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1556 transitions. [2023-09-01 11:48:19,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1556 transitions. [2023-09-01 11:48:19,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:19,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1556 transitions. [2023-09-01 11:48:19,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.88888888888889) internal successors, (1556), 9 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,186 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,186 INFO L175 Difference]: Start difference. First operand has 151 places, 139 transitions, 1931 flow. Second operand 9 states and 1556 transitions. [2023-09-01 11:48:19,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 179 transitions, 2684 flow [2023-09-01 11:48:19,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 179 transitions, 2512 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-09-01 11:48:19,214 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 2020 flow [2023-09-01 11:48:19,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2020, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2023-09-01 11:48:19,219 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 119 predicate places. [2023-09-01 11:48:19,219 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 2020 flow [2023-09-01 11:48:19,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:19,220 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:19,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 11:48:19,220 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:19,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1320325120, now seen corresponding path program 2 times [2023-09-01 11:48:19,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:19,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894987297] [2023-09-01 11:48:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:19,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894987297] [2023-09-01 11:48:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894987297] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:19,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:19,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:48:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156449085] [2023-09-01 11:48:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:19,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:48:19,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:48:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:48:19,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:48:19,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 2020 flow. Second operand has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:19,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:48:19,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:19,908 INFO L130 PetriNetUnfolder]: 480/897 cut-off events. [2023-09-01 11:48:19,909 INFO L131 PetriNetUnfolder]: For 6949/6949 co-relation queries the response was YES. [2023-09-01 11:48:19,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5284 conditions, 897 events. 480/897 cut-off events. For 6949/6949 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4286 event pairs, 90 based on Foata normal form. 4/901 useless extension candidates. Maximal degree in co-relation 5177. Up to 387 conditions per place. [2023-09-01 11:48:19,916 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 125 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2023-09-01 11:48:19,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 183 transitions, 2664 flow [2023-09-01 11:48:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1558 transitions. [2023-09-01 11:48:19,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-09-01 11:48:19,918 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1558 transitions. [2023-09-01 11:48:19,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1558 transitions. [2023-09-01 11:48:19,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:19,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1558 transitions. [2023-09-01 11:48:19,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.11111111111111) internal successors, (1558), 9 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,923 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,923 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 2020 flow. Second operand 9 states and 1558 transitions. [2023-09-01 11:48:19,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 183 transitions, 2664 flow [2023-09-01 11:48:19,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 183 transitions, 2635 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 11:48:19,950 INFO L231 Difference]: Finished difference. Result has 153 places, 156 transitions, 2207 flow [2023-09-01 11:48:19,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2207, PETRI_PLACES=153, PETRI_TRANSITIONS=156} [2023-09-01 11:48:19,952 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 127 predicate places. [2023-09-01 11:48:19,952 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 156 transitions, 2207 flow [2023-09-01 11:48:19,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:19,953 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:19,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-09-01 11:48:19,953 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:19,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1989493530, now seen corresponding path program 3 times [2023-09-01 11:48:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:19,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723552026] [2023-09-01 11:48:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:20,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723552026] [2023-09-01 11:48:20,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723552026] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:20,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:20,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:48:20,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930442446] [2023-09-01 11:48:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:20,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:48:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:48:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:48:20,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:48:20,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 156 transitions, 2207 flow. Second operand has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:20,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:20,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:48:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:20,601 INFO L130 PetriNetUnfolder]: 464/863 cut-off events. [2023-09-01 11:48:20,601 INFO L131 PetriNetUnfolder]: For 6970/6970 co-relation queries the response was YES. [2023-09-01 11:48:20,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5264 conditions, 863 events. 464/863 cut-off events. For 6970/6970 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4050 event pairs, 78 based on Foata normal form. 4/867 useless extension candidates. Maximal degree in co-relation 5155. Up to 279 conditions per place. [2023-09-01 11:48:20,608 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 139 selfloop transitions, 63 changer transitions 2/205 dead transitions. [2023-09-01 11:48:20,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 205 transitions, 3075 flow [2023-09-01 11:48:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1567 transitions. [2023-09-01 11:48:20,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246612466124661 [2023-09-01 11:48:20,623 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1567 transitions. [2023-09-01 11:48:20,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1567 transitions. [2023-09-01 11:48:20,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:20,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1567 transitions. [2023-09-01 11:48:20,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.11111111111111) internal successors, (1567), 9 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:20,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:20,627 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:20,627 INFO L175 Difference]: Start difference. First operand has 153 places, 156 transitions, 2207 flow. Second operand 9 states and 1567 transitions. [2023-09-01 11:48:20,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 205 transitions, 3075 flow [2023-09-01 11:48:20,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 205 transitions, 3046 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 11:48:20,657 INFO L231 Difference]: Finished difference. Result has 161 places, 162 transitions, 2445 flow [2023-09-01 11:48:20,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2445, PETRI_PLACES=161, PETRI_TRANSITIONS=162} [2023-09-01 11:48:20,657 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2023-09-01 11:48:20,657 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 162 transitions, 2445 flow [2023-09-01 11:48:20,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:20,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:20,658 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-09-01 11:48:20,658 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:20,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2037644614, now seen corresponding path program 4 times [2023-09-01 11:48:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:20,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587755242] [2023-09-01 11:48:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587755242] [2023-09-01 11:48:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587755242] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:48:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100767252] [2023-09-01 11:48:20,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:20,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:48:20,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:48:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:48:21,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:48:21,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 162 transitions, 2445 flow. Second operand has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:21,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:48:21,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:21,390 INFO L130 PetriNetUnfolder]: 498/923 cut-off events. [2023-09-01 11:48:21,390 INFO L131 PetriNetUnfolder]: For 9048/9050 co-relation queries the response was YES. [2023-09-01 11:48:21,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 923 events. 498/923 cut-off events. For 9048/9050 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4371 event pairs, 43 based on Foata normal form. 4/927 useless extension candidates. Maximal degree in co-relation 5739. Up to 406 conditions per place. [2023-09-01 11:48:21,398 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 179 selfloop transitions, 34 changer transitions 4/218 dead transitions. [2023-09-01 11:48:21,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 218 transitions, 3427 flow [2023-09-01 11:48:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:48:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:48:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1222 transitions. [2023-09-01 11:48:21,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578397212543556 [2023-09-01 11:48:21,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1222 transitions. [2023-09-01 11:48:21,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1222 transitions. [2023-09-01 11:48:21,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:21,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1222 transitions. [2023-09-01 11:48:21,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.57142857142858) internal successors, (1222), 7 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,405 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,405 INFO L175 Difference]: Start difference. First operand has 161 places, 162 transitions, 2445 flow. Second operand 7 states and 1222 transitions. [2023-09-01 11:48:21,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 218 transitions, 3427 flow [2023-09-01 11:48:21,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 218 transitions, 3337 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-09-01 11:48:21,441 INFO L231 Difference]: Finished difference. Result has 164 places, 168 transitions, 2584 flow [2023-09-01 11:48:21,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2584, PETRI_PLACES=164, PETRI_TRANSITIONS=168} [2023-09-01 11:48:21,442 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 138 predicate places. [2023-09-01 11:48:21,442 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 168 transitions, 2584 flow [2023-09-01 11:48:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.22222222222223) internal successors, (1505), 9 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:21,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:21,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-09-01 11:48:21,443 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:21,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1323057116, now seen corresponding path program 5 times [2023-09-01 11:48:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150555840] [2023-09-01 11:48:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150555840] [2023-09-01 11:48:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150555840] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130312724] [2023-09-01 11:48:21,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:48:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:21,715 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) [2023-09-01 11:48:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:48:21,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:48:21,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:21,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 11:48:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:22,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:22,116 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:48:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:48:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130312724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:22,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:22,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 16 [2023-09-01 11:48:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103670032] [2023-09-01 11:48:22,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:22,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:48:22,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:48:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:48:22,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 410 [2023-09-01 11:48:22,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 168 transitions, 2584 flow. Second operand has 16 states, 16 states have (on average 163.5) internal successors, (2616), 16 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:22,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:22,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 410 [2023-09-01 11:48:22,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:23,155 INFO L130 PetriNetUnfolder]: 501/939 cut-off events. [2023-09-01 11:48:23,155 INFO L131 PetriNetUnfolder]: For 9466/9468 co-relation queries the response was YES. [2023-09-01 11:48:23,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5926 conditions, 939 events. 501/939 cut-off events. For 9466/9468 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4520 event pairs, 91 based on Foata normal form. 6/945 useless extension candidates. Maximal degree in co-relation 5813. Up to 414 conditions per place. [2023-09-01 11:48:23,164 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 142 selfloop transitions, 81 changer transitions 2/226 dead transitions. [2023-09-01 11:48:23,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 226 transitions, 3531 flow [2023-09-01 11:48:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:48:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:48:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2016 transitions. [2023-09-01 11:48:23,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2023-09-01 11:48:23,180 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2016 transitions. [2023-09-01 11:48:23,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2016 transitions. [2023-09-01 11:48:23,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:23,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2016 transitions. [2023-09-01 11:48:23,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:23,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:23,187 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:23,187 INFO L175 Difference]: Start difference. First operand has 164 places, 168 transitions, 2584 flow. Second operand 12 states and 2016 transitions. [2023-09-01 11:48:23,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 226 transitions, 3531 flow [2023-09-01 11:48:23,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 226 transitions, 3412 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-09-01 11:48:23,225 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 2779 flow [2023-09-01 11:48:23,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2779, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2023-09-01 11:48:23,226 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 145 predicate places. [2023-09-01 11:48:23,226 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 2779 flow [2023-09-01 11:48:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 163.5) internal successors, (2616), 16 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:23,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:23,227 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:23,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:23,433 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:23,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 362584518, now seen corresponding path program 6 times [2023-09-01 11:48:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:23,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714170062] [2023-09-01 11:48:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:23,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:23,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714170062] [2023-09-01 11:48:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714170062] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083086820] [2023-09-01 11:48:23,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:48:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:23,705 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) [2023-09-01 11:48:23,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 11:48:23,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:48:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:23,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 11:48:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:24,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:24,080 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:48:24,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:48:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:24,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083086820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:24,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:24,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 17 [2023-09-01 11:48:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669733387] [2023-09-01 11:48:24,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:24,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:48:24,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:48:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:48:24,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 410 [2023-09-01 11:48:24,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 2779 flow. Second operand has 17 states, 17 states have (on average 163.35294117647058) internal successors, (2777), 17 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) [2023-09-01 11:48:24,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:24,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 410 [2023-09-01 11:48:24,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:24,948 INFO L130 PetriNetUnfolder]: 482/898 cut-off events. [2023-09-01 11:48:24,948 INFO L131 PetriNetUnfolder]: For 9419/9419 co-relation queries the response was YES. [2023-09-01 11:48:24,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 898 events. 482/898 cut-off events. For 9419/9419 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4259 event pairs, 95 based on Foata normal form. 4/902 useless extension candidates. Maximal degree in co-relation 5748. Up to 458 conditions per place. [2023-09-01 11:48:24,954 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 126 selfloop transitions, 80 changer transitions 0/207 dead transitions. [2023-09-01 11:48:24,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 3382 flow [2023-09-01 11:48:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:48:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:48:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1845 transitions. [2023-09-01 11:48:24,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-09-01 11:48:24,979 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1845 transitions. [2023-09-01 11:48:24,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1845 transitions. [2023-09-01 11:48:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1845 transitions. [2023-09-01 11:48:24,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.72727272727272) internal successors, (1845), 11 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:24,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:24,983 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:24,983 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 2779 flow. Second operand 11 states and 1845 transitions. [2023-09-01 11:48:24,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 3382 flow [2023-09-01 11:48:25,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 207 transitions, 3097 flow, removed 43 selfloop flow, removed 18 redundant places. [2023-09-01 11:48:25,009 INFO L231 Difference]: Finished difference. Result has 159 places, 171 transitions, 2594 flow [2023-09-01 11:48:25,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2594, PETRI_PLACES=159, PETRI_TRANSITIONS=171} [2023-09-01 11:48:25,010 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 133 predicate places. [2023-09-01 11:48:25,010 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 171 transitions, 2594 flow [2023-09-01 11:48:25,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.35294117647058) internal successors, (2777), 17 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) [2023-09-01 11:48:25,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:25,011 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:25,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:25,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:25,216 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:25,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash -310847470, now seen corresponding path program 7 times [2023-09-01 11:48:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:25,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290687993] [2023-09-01 11:48:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:25,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:25,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290687993] [2023-09-01 11:48:25,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290687993] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:25,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:25,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-09-01 11:48:25,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442714180] [2023-09-01 11:48:25,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 11:48:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 11:48:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:48:25,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 410 [2023-09-01 11:48:25,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 171 transitions, 2594 flow. Second operand has 9 states, 9 states have (on average 164.22222222222223) internal successors, (1478), 9 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:25,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 410 [2023-09-01 11:48:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:25,981 INFO L130 PetriNetUnfolder]: 466/870 cut-off events. [2023-09-01 11:48:25,981 INFO L131 PetriNetUnfolder]: For 7974/7974 co-relation queries the response was YES. [2023-09-01 11:48:25,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5465 conditions, 870 events. 466/870 cut-off events. For 7974/7974 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4107 event pairs, 75 based on Foata normal form. 4/874 useless extension candidates. Maximal degree in co-relation 5365. Up to 303 conditions per place. [2023-09-01 11:48:25,988 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 108 selfloop transitions, 80 changer transitions 2/191 dead transitions. [2023-09-01 11:48:25,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 191 transitions, 3116 flow [2023-09-01 11:48:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:48:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:48:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1522 transitions. [2023-09-01 11:48:25,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124661246612466 [2023-09-01 11:48:25,991 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1522 transitions. [2023-09-01 11:48:25,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1522 transitions. [2023-09-01 11:48:25,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:25,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1522 transitions. [2023-09-01 11:48:25,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,996 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 410.0) internal successors, (4100), 10 states have internal predecessors, (4100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,996 INFO L175 Difference]: Start difference. First operand has 159 places, 171 transitions, 2594 flow. Second operand 9 states and 1522 transitions. [2023-09-01 11:48:25,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 191 transitions, 3116 flow [2023-09-01 11:48:26,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 191 transitions, 3047 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-09-01 11:48:26,025 INFO L231 Difference]: Finished difference. Result has 160 places, 167 transitions, 2641 flow [2023-09-01 11:48:26,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2641, PETRI_PLACES=160, PETRI_TRANSITIONS=167} [2023-09-01 11:48:26,025 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-09-01 11:48:26,025 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 167 transitions, 2641 flow [2023-09-01 11:48:26,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 164.22222222222223) internal successors, (1478), 9 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:26,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:26,026 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:26,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-09-01 11:48:26,026 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:26,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2085281639, now seen corresponding path program 1 times [2023-09-01 11:48:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158339256] [2023-09-01 11:48:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:26,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:26,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:26,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158339256] [2023-09-01 11:48:26,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158339256] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:26,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:26,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277416397] [2023-09-01 11:48:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:26,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:26,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:26,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 167 transitions, 2641 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:26,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:26,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:26,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:27,685 INFO L130 PetriNetUnfolder]: 779/1372 cut-off events. [2023-09-01 11:48:27,685 INFO L131 PetriNetUnfolder]: For 11657/11657 co-relation queries the response was YES. [2023-09-01 11:48:27,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8295 conditions, 1372 events. 779/1372 cut-off events. For 11657/11657 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6742 event pairs, 77 based on Foata normal form. 1/1373 useless extension candidates. Maximal degree in co-relation 8195. Up to 227 conditions per place. [2023-09-01 11:48:27,693 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 190 selfloop transitions, 141 changer transitions 5/336 dead transitions. [2023-09-01 11:48:27,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 336 transitions, 4769 flow [2023-09-01 11:48:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3573 transitions. [2023-09-01 11:48:27,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39611973392461197 [2023-09-01 11:48:27,720 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3573 transitions. [2023-09-01 11:48:27,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3573 transitions. [2023-09-01 11:48:27,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:27,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3573 transitions. [2023-09-01 11:48:27,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 162.4090909090909) internal successors, (3573), 22 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:27,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:27,735 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:27,735 INFO L175 Difference]: Start difference. First operand has 160 places, 167 transitions, 2641 flow. Second operand 22 states and 3573 transitions. [2023-09-01 11:48:27,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 336 transitions, 4769 flow [2023-09-01 11:48:27,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 336 transitions, 4603 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-09-01 11:48:27,764 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 3813 flow [2023-09-01 11:48:27,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3813, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2023-09-01 11:48:27,764 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 156 predicate places. [2023-09-01 11:48:27,764 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 3813 flow [2023-09-01 11:48:27,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:27,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:27,765 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-09-01 11:48:27,765 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:27,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash 667533083, now seen corresponding path program 2 times [2023-09-01 11:48:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003165826] [2023-09-01 11:48:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:28,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003165826] [2023-09-01 11:48:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003165826] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087543523] [2023-09-01 11:48:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:28,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:28,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:28,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:48:28,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 3813 flow. Second operand has 12 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:28,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:28,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:48:28,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:29,158 INFO L130 PetriNetUnfolder]: 941/1663 cut-off events. [2023-09-01 11:48:29,158 INFO L131 PetriNetUnfolder]: For 17550/17550 co-relation queries the response was YES. [2023-09-01 11:48:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10755 conditions, 1663 events. 941/1663 cut-off events. For 17550/17550 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8740 event pairs, 65 based on Foata normal form. 10/1673 useless extension candidates. Maximal degree in co-relation 10651. Up to 269 conditions per place. [2023-09-01 11:48:29,169 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 191 selfloop transitions, 145 changer transitions 12/348 dead transitions. [2023-09-01 11:48:29,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 348 transitions, 5614 flow [2023-09-01 11:48:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:48:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:48:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3041 transitions. [2023-09-01 11:48:29,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39037227214377407 [2023-09-01 11:48:29,172 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3041 transitions. [2023-09-01 11:48:29,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3041 transitions. [2023-09-01 11:48:29,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:29,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3041 transitions. [2023-09-01 11:48:29,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 160.05263157894737) internal successors, (3041), 19 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:29,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:29,178 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:29,178 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 3813 flow. Second operand 19 states and 3041 transitions. [2023-09-01 11:48:29,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 348 transitions, 5614 flow [2023-09-01 11:48:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 348 transitions, 5459 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-09-01 11:48:29,226 INFO L231 Difference]: Finished difference. Result has 205 places, 253 transitions, 4485 flow [2023-09-01 11:48:29,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4485, PETRI_PLACES=205, PETRI_TRANSITIONS=253} [2023-09-01 11:48:29,227 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 179 predicate places. [2023-09-01 11:48:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 253 transitions, 4485 flow [2023-09-01 11:48:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:29,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:29,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:29,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-09-01 11:48:29,228 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:29,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 888752717, now seen corresponding path program 3 times [2023-09-01 11:48:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724098562] [2023-09-01 11:48:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724098562] [2023-09-01 11:48:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724098562] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:29,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172504669] [2023-09-01 11:48:29,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:30,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:30,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 253 transitions, 4485 flow. Second operand has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:30,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:30,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:30,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:30,955 INFO L130 PetriNetUnfolder]: 1087/1908 cut-off events. [2023-09-01 11:48:30,955 INFO L131 PetriNetUnfolder]: For 20831/20831 co-relation queries the response was YES. [2023-09-01 11:48:30,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12887 conditions, 1908 events. 1087/1908 cut-off events. For 20831/20831 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10109 event pairs, 119 based on Foata normal form. 3/1911 useless extension candidates. Maximal degree in co-relation 12769. Up to 342 conditions per place. [2023-09-01 11:48:30,969 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 246 selfloop transitions, 172 changer transitions 8/426 dead transitions. [2023-09-01 11:48:30,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 426 transitions, 6572 flow [2023-09-01 11:48:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:48:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:48:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4215 transitions. [2023-09-01 11:48:30,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954033771106942 [2023-09-01 11:48:30,972 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4215 transitions. [2023-09-01 11:48:30,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4215 transitions. [2023-09-01 11:48:30,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:30,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4215 transitions. [2023-09-01 11:48:30,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 162.1153846153846) internal successors, (4215), 26 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:30,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:30,980 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:30,981 INFO L175 Difference]: Start difference. First operand has 205 places, 253 transitions, 4485 flow. Second operand 26 states and 4215 transitions. [2023-09-01 11:48:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 426 transitions, 6572 flow [2023-09-01 11:48:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 426 transitions, 6453 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-09-01 11:48:31,044 INFO L231 Difference]: Finished difference. Result has 231 places, 275 transitions, 5127 flow [2023-09-01 11:48:31,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5127, PETRI_PLACES=231, PETRI_TRANSITIONS=275} [2023-09-01 11:48:31,045 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 205 predicate places. [2023-09-01 11:48:31,045 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 275 transitions, 5127 flow [2023-09-01 11:48:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:31,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:31,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-09-01 11:48:31,046 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:31,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1880887905, now seen corresponding path program 4 times [2023-09-01 11:48:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876223653] [2023-09-01 11:48:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:31,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:31,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876223653] [2023-09-01 11:48:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876223653] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:31,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024465513] [2023-09-01 11:48:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:31,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:31,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 275 transitions, 5127 flow. Second operand has 13 states, 13 states have (on average 156.6153846153846) internal successors, (2036), 13 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:31,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:31,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:31,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:32,611 INFO L130 PetriNetUnfolder]: 1128/1993 cut-off events. [2023-09-01 11:48:32,611 INFO L131 PetriNetUnfolder]: For 24120/24120 co-relation queries the response was YES. [2023-09-01 11:48:32,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14386 conditions, 1993 events. 1128/1993 cut-off events. For 24120/24120 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10773 event pairs, 194 based on Foata normal form. 1/1994 useless extension candidates. Maximal degree in co-relation 14261. Up to 580 conditions per place. [2023-09-01 11:48:32,628 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 202 selfloop transitions, 163 changer transitions 6/371 dead transitions. [2023-09-01 11:48:32,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 371 transitions, 6732 flow [2023-09-01 11:48:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3567 transitions. [2023-09-01 11:48:32,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2023-09-01 11:48:32,631 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3567 transitions. [2023-09-01 11:48:32,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3567 transitions. [2023-09-01 11:48:32,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:32,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3567 transitions. [2023-09-01 11:48:32,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 162.13636363636363) internal successors, (3567), 22 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:32,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:32,637 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:32,637 INFO L175 Difference]: Start difference. First operand has 231 places, 275 transitions, 5127 flow. Second operand 22 states and 3567 transitions. [2023-09-01 11:48:32,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 371 transitions, 6732 flow [2023-09-01 11:48:32,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 371 transitions, 6502 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-09-01 11:48:32,718 INFO L231 Difference]: Finished difference. Result has 245 places, 296 transitions, 5749 flow [2023-09-01 11:48:32,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5749, PETRI_PLACES=245, PETRI_TRANSITIONS=296} [2023-09-01 11:48:32,718 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 219 predicate places. [2023-09-01 11:48:32,719 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 296 transitions, 5749 flow [2023-09-01 11:48:32,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.6153846153846) internal successors, (2036), 13 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:32,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:32,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:32,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-09-01 11:48:32,719 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:32,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1306807323, now seen corresponding path program 5 times [2023-09-01 11:48:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:32,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793840984] [2023-09-01 11:48:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:32,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:33,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793840984] [2023-09-01 11:48:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793840984] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:33,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:33,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270530639] [2023-09-01 11:48:33,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:33,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:33,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:33,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 296 transitions, 5749 flow. Second operand has 13 states, 13 states have (on average 156.6153846153846) internal successors, (2036), 13 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:33,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:33,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:34,186 INFO L130 PetriNetUnfolder]: 1136/2017 cut-off events. [2023-09-01 11:48:34,186 INFO L131 PetriNetUnfolder]: For 26640/26640 co-relation queries the response was YES. [2023-09-01 11:48:34,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14854 conditions, 2017 events. 1136/2017 cut-off events. For 26640/26640 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11075 event pairs, 190 based on Foata normal form. 1/2018 useless extension candidates. Maximal degree in co-relation 14722. Up to 580 conditions per place. [2023-09-01 11:48:34,201 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 206 selfloop transitions, 160 changer transitions 6/372 dead transitions. [2023-09-01 11:48:34,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 372 transitions, 7055 flow [2023-09-01 11:48:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:48:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:48:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-09-01 11:48:34,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39602053915276 [2023-09-01 11:48:34,203 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-09-01 11:48:34,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-09-01 11:48:34,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:34,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-09-01 11:48:34,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:34,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:34,209 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:34,209 INFO L175 Difference]: Start difference. First operand has 245 places, 296 transitions, 5749 flow. Second operand 19 states and 3085 transitions. [2023-09-01 11:48:34,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 372 transitions, 7055 flow [2023-09-01 11:48:34,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 372 transitions, 6837 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-09-01 11:48:34,286 INFO L231 Difference]: Finished difference. Result has 258 places, 301 transitions, 6024 flow [2023-09-01 11:48:34,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6024, PETRI_PLACES=258, PETRI_TRANSITIONS=301} [2023-09-01 11:48:34,287 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 232 predicate places. [2023-09-01 11:48:34,287 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 301 transitions, 6024 flow [2023-09-01 11:48:34,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.6153846153846) internal successors, (2036), 13 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:34,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:34,287 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:34,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-09-01 11:48:34,288 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:34,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1266843037, now seen corresponding path program 6 times [2023-09-01 11:48:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17919214] [2023-09-01 11:48:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:34,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:34,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17919214] [2023-09-01 11:48:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17919214] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:48:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990109534] [2023-09-01 11:48:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:34,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:48:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:48:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:48:34,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:48:34,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 301 transitions, 6024 flow. Second operand has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:34,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:34,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:48:34,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:35,779 INFO L130 PetriNetUnfolder]: 1178/2248 cut-off events. [2023-09-01 11:48:35,779 INFO L131 PetriNetUnfolder]: For 29035/29040 co-relation queries the response was YES. [2023-09-01 11:48:35,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16138 conditions, 2248 events. 1178/2248 cut-off events. For 29035/29040 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13507 event pairs, 77 based on Foata normal form. 7/2253 useless extension candidates. Maximal degree in co-relation 16002. Up to 400 conditions per place. [2023-09-01 11:48:35,802 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 207 selfloop transitions, 228 changer transitions 9/451 dead transitions. [2023-09-01 11:48:35,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 451 transitions, 8110 flow [2023-09-01 11:48:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:48:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:48:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4228 transitions. [2023-09-01 11:48:35,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39662288930581613 [2023-09-01 11:48:35,805 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4228 transitions. [2023-09-01 11:48:35,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4228 transitions. [2023-09-01 11:48:35,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:35,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4228 transitions. [2023-09-01 11:48:35,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 162.6153846153846) internal successors, (4228), 26 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:35,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:35,813 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:35,813 INFO L175 Difference]: Start difference. First operand has 258 places, 301 transitions, 6024 flow. Second operand 26 states and 4228 transitions. [2023-09-01 11:48:35,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 451 transitions, 8110 flow [2023-09-01 11:48:35,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 451 transitions, 7754 flow, removed 10 selfloop flow, removed 15 redundant places. [2023-09-01 11:48:35,909 INFO L231 Difference]: Finished difference. Result has 275 places, 340 transitions, 6873 flow [2023-09-01 11:48:35,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=5697, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6873, PETRI_PLACES=275, PETRI_TRANSITIONS=340} [2023-09-01 11:48:35,910 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 249 predicate places. [2023-09-01 11:48:35,910 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 340 transitions, 6873 flow [2023-09-01 11:48:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:35,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:35,910 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-09-01 11:48:35,911 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:35,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1703155119, now seen corresponding path program 7 times [2023-09-01 11:48:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276041204] [2023-09-01 11:48:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276041204] [2023-09-01 11:48:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276041204] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:36,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:36,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:36,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824187544] [2023-09-01 11:48:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:36,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:36,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 340 transitions, 6873 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:36,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:36,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:36,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:37,509 INFO L130 PetriNetUnfolder]: 1395/2544 cut-off events. [2023-09-01 11:48:37,509 INFO L131 PetriNetUnfolder]: For 35241/35241 co-relation queries the response was YES. [2023-09-01 11:48:37,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19094 conditions, 2544 events. 1395/2544 cut-off events. For 35241/35241 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14857 event pairs, 211 based on Foata normal form. 1/2545 useless extension candidates. Maximal degree in co-relation 18951. Up to 871 conditions per place. [2023-09-01 11:48:37,531 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 248 selfloop transitions, 181 changer transitions 6/435 dead transitions. [2023-09-01 11:48:37,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 435 transitions, 8561 flow [2023-09-01 11:48:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3548 transitions. [2023-09-01 11:48:37,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39334811529933483 [2023-09-01 11:48:37,534 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3548 transitions. [2023-09-01 11:48:37,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3548 transitions. [2023-09-01 11:48:37,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:37,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3548 transitions. [2023-09-01 11:48:37,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 161.27272727272728) internal successors, (3548), 22 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:37,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:37,540 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:37,540 INFO L175 Difference]: Start difference. First operand has 275 places, 340 transitions, 6873 flow. Second operand 22 states and 3548 transitions. [2023-09-01 11:48:37,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 435 transitions, 8561 flow [2023-09-01 11:48:37,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 435 transitions, 8037 flow, removed 61 selfloop flow, removed 20 redundant places. [2023-09-01 11:48:37,675 INFO L231 Difference]: Finished difference. Result has 280 places, 353 transitions, 7083 flow [2023-09-01 11:48:37,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=6392, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7083, PETRI_PLACES=280, PETRI_TRANSITIONS=353} [2023-09-01 11:48:37,676 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 254 predicate places. [2023-09-01 11:48:37,676 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 353 transitions, 7083 flow [2023-09-01 11:48:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:37,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:37,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-09-01 11:48:37,676 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:37,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 922318553, now seen corresponding path program 8 times [2023-09-01 11:48:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821186820] [2023-09-01 11:48:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821186820] [2023-09-01 11:48:38,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821186820] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:38,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:38,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526839586] [2023-09-01 11:48:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:38,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:38,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:38,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 353 transitions, 7083 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:38,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:38,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:39,370 INFO L130 PetriNetUnfolder]: 1390/2533 cut-off events. [2023-09-01 11:48:39,370 INFO L131 PetriNetUnfolder]: For 32940/32940 co-relation queries the response was YES. [2023-09-01 11:48:39,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18955 conditions, 2533 events. 1390/2533 cut-off events. For 32940/32940 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14779 event pairs, 216 based on Foata normal form. 3/2536 useless extension candidates. Maximal degree in co-relation 18810. Up to 919 conditions per place. [2023-09-01 11:48:39,389 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 231 selfloop transitions, 175 changer transitions 11/417 dead transitions. [2023-09-01 11:48:39,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 8236 flow [2023-09-01 11:48:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 11:48:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 11:48:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3222 transitions. [2023-09-01 11:48:39,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3929268292682927 [2023-09-01 11:48:39,399 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3222 transitions. [2023-09-01 11:48:39,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3222 transitions. [2023-09-01 11:48:39,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:39,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3222 transitions. [2023-09-01 11:48:39,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.1) internal successors, (3222), 20 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:39,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 410.0) internal successors, (8610), 21 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:39,405 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 410.0) internal successors, (8610), 21 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:39,405 INFO L175 Difference]: Start difference. First operand has 280 places, 353 transitions, 7083 flow. Second operand 20 states and 3222 transitions. [2023-09-01 11:48:39,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 8236 flow [2023-09-01 11:48:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 417 transitions, 7950 flow, removed 12 selfloop flow, removed 14 redundant places. [2023-09-01 11:48:39,527 INFO L231 Difference]: Finished difference. Result has 286 places, 349 transitions, 7063 flow [2023-09-01 11:48:39,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7063, PETRI_PLACES=286, PETRI_TRANSITIONS=349} [2023-09-01 11:48:39,527 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 260 predicate places. [2023-09-01 11:48:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 349 transitions, 7063 flow [2023-09-01 11:48:39,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:39,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:39,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:39,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-09-01 11:48:39,528 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:39,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2017731595, now seen corresponding path program 9 times [2023-09-01 11:48:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:39,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598246046] [2023-09-01 11:48:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:48:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598246046] [2023-09-01 11:48:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598246046] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:40,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546292053] [2023-09-01 11:48:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:48:40,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:40,298 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) [2023-09-01 11:48:40,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 11:48:40,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:48:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 11:48:40,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:40,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546292053] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:40,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:40,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 28 [2023-09-01 11:48:40,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927801905] [2023-09-01 11:48:40,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:40,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:40,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:48:41,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:41,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 349 transitions, 7063 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:41,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:41,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:42,189 INFO L130 PetriNetUnfolder]: 1386/2517 cut-off events. [2023-09-01 11:48:42,189 INFO L131 PetriNetUnfolder]: For 34874/34874 co-relation queries the response was YES. [2023-09-01 11:48:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18880 conditions, 2517 events. 1386/2517 cut-off events. For 34874/34874 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14570 event pairs, 214 based on Foata normal form. 1/2518 useless extension candidates. Maximal degree in co-relation 18733. Up to 1256 conditions per place. [2023-09-01 11:48:42,211 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 273 selfloop transitions, 127 changer transitions 5/405 dead transitions. [2023-09-01 11:48:42,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 405 transitions, 8207 flow [2023-09-01 11:48:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:48:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:48:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2274 transitions. [2023-09-01 11:48:42,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39616724738675957 [2023-09-01 11:48:42,222 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2274 transitions. [2023-09-01 11:48:42,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2274 transitions. [2023-09-01 11:48:42,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:42,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2274 transitions. [2023-09-01 11:48:42,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.42857142857142) internal successors, (2274), 14 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:42,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:42,226 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:42,226 INFO L175 Difference]: Start difference. First operand has 286 places, 349 transitions, 7063 flow. Second operand 14 states and 2274 transitions. [2023-09-01 11:48:42,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 405 transitions, 8207 flow [2023-09-01 11:48:42,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 405 transitions, 7870 flow, removed 3 selfloop flow, removed 19 redundant places. [2023-09-01 11:48:42,343 INFO L231 Difference]: Finished difference. Result has 278 places, 352 transitions, 7034 flow [2023-09-01 11:48:42,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7034, PETRI_PLACES=278, PETRI_TRANSITIONS=352} [2023-09-01 11:48:42,344 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 252 predicate places. [2023-09-01 11:48:42,344 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 352 transitions, 7034 flow [2023-09-01 11:48:42,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:42,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:42,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:42,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:42,555 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:42,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1516426929, now seen corresponding path program 10 times [2023-09-01 11:48:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407670279] [2023-09-01 11:48:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:42,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:42,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407670279] [2023-09-01 11:48:42,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407670279] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:42,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:42,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566102804] [2023-09-01 11:48:42,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:42,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:43,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:43,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 352 transitions, 7034 flow. Second operand has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:43,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:43,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:43,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:44,398 INFO L130 PetriNetUnfolder]: 1552/2839 cut-off events. [2023-09-01 11:48:44,398 INFO L131 PetriNetUnfolder]: For 40089/40089 co-relation queries the response was YES. [2023-09-01 11:48:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20996 conditions, 2839 events. 1552/2839 cut-off events. For 40089/40089 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17162 event pairs, 114 based on Foata normal form. 2/2841 useless extension candidates. Maximal degree in co-relation 20850. Up to 583 conditions per place. [2023-09-01 11:48:44,419 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 224 selfloop transitions, 272 changer transitions 5/501 dead transitions. [2023-09-01 11:48:44,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 501 transitions, 9435 flow [2023-09-01 11:48:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:48:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:48:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4182 transitions. [2023-09-01 11:48:44,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2023-09-01 11:48:44,422 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4182 transitions. [2023-09-01 11:48:44,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4182 transitions. [2023-09-01 11:48:44,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:44,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4182 transitions. [2023-09-01 11:48:44,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 160.84615384615384) internal successors, (4182), 26 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:44,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:44,429 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:44,429 INFO L175 Difference]: Start difference. First operand has 278 places, 352 transitions, 7034 flow. Second operand 26 states and 4182 transitions. [2023-09-01 11:48:44,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 501 transitions, 9435 flow [2023-09-01 11:48:44,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 501 transitions, 9045 flow, removed 20 selfloop flow, removed 17 redundant places. [2023-09-01 11:48:44,550 INFO L231 Difference]: Finished difference. Result has 298 places, 401 transitions, 8347 flow [2023-09-01 11:48:44,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8347, PETRI_PLACES=298, PETRI_TRANSITIONS=401} [2023-09-01 11:48:44,551 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 272 predicate places. [2023-09-01 11:48:44,551 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 401 transitions, 8347 flow [2023-09-01 11:48:44,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:44,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:44,552 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:44,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-09-01 11:48:44,552 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:44,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1176697371, now seen corresponding path program 11 times [2023-09-01 11:48:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:44,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222947062] [2023-09-01 11:48:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:44,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222947062] [2023-09-01 11:48:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222947062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814334550] [2023-09-01 11:48:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:45,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:45,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 401 transitions, 8347 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:45,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:45,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:45,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:46,430 INFO L130 PetriNetUnfolder]: 1612/2952 cut-off events. [2023-09-01 11:48:46,430 INFO L131 PetriNetUnfolder]: For 44066/44066 co-relation queries the response was YES. [2023-09-01 11:48:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22745 conditions, 2952 events. 1612/2952 cut-off events. For 44066/44066 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18027 event pairs, 136 based on Foata normal form. 1/2953 useless extension candidates. Maximal degree in co-relation 22591. Up to 735 conditions per place. [2023-09-01 11:48:46,457 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 251 selfloop transitions, 240 changer transitions 2/493 dead transitions. [2023-09-01 11:48:46,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 493 transitions, 10313 flow [2023-09-01 11:48:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:48:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:48:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3074 transitions. [2023-09-01 11:48:46,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946084724005135 [2023-09-01 11:48:46,459 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3074 transitions. [2023-09-01 11:48:46,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3074 transitions. [2023-09-01 11:48:46,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:46,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3074 transitions. [2023-09-01 11:48:46,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.78947368421052) internal successors, (3074), 19 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) [2023-09-01 11:48:46,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:46,465 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:46,465 INFO L175 Difference]: Start difference. First operand has 298 places, 401 transitions, 8347 flow. Second operand 19 states and 3074 transitions. [2023-09-01 11:48:46,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 493 transitions, 10313 flow [2023-09-01 11:48:46,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 493 transitions, 9984 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-09-01 11:48:46,622 INFO L231 Difference]: Finished difference. Result has 311 places, 424 transitions, 9155 flow [2023-09-01 11:48:46,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8046, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9155, PETRI_PLACES=311, PETRI_TRANSITIONS=424} [2023-09-01 11:48:46,623 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 285 predicate places. [2023-09-01 11:48:46,623 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 424 transitions, 9155 flow [2023-09-01 11:48:46,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:46,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:46,623 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:46,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-09-01 11:48:46,623 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:46,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash 195493989, now seen corresponding path program 12 times [2023-09-01 11:48:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493282344] [2023-09-01 11:48:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:46,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:47,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:47,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493282344] [2023-09-01 11:48:47,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493282344] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:47,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:47,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:47,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998604809] [2023-09-01 11:48:47,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:47,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:47,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:47,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:47,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:48:47,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 424 transitions, 9155 flow. Second operand has 13 states, 13 states have (on average 153.6153846153846) internal successors, (1997), 13 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:47,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:47,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:48:47,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:48,384 INFO L130 PetriNetUnfolder]: 1585/2910 cut-off events. [2023-09-01 11:48:48,384 INFO L131 PetriNetUnfolder]: For 46361/46361 co-relation queries the response was YES. [2023-09-01 11:48:48,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22851 conditions, 2910 events. 1585/2910 cut-off events. For 46361/46361 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17842 event pairs, 190 based on Foata normal form. 14/2924 useless extension candidates. Maximal degree in co-relation 22694. Up to 810 conditions per place. [2023-09-01 11:48:48,408 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 229 selfloop transitions, 251 changer transitions 9/489 dead transitions. [2023-09-01 11:48:48,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 489 transitions, 10419 flow [2023-09-01 11:48:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3513 transitions. [2023-09-01 11:48:48,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894678492239468 [2023-09-01 11:48:48,411 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3513 transitions. [2023-09-01 11:48:48,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3513 transitions. [2023-09-01 11:48:48,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:48,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3513 transitions. [2023-09-01 11:48:48,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 159.6818181818182) internal successors, (3513), 22 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:48,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:48,417 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:48,417 INFO L175 Difference]: Start difference. First operand has 311 places, 424 transitions, 9155 flow. Second operand 22 states and 3513 transitions. [2023-09-01 11:48:48,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 489 transitions, 10419 flow [2023-09-01 11:48:48,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 489 transitions, 10170 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-09-01 11:48:48,583 INFO L231 Difference]: Finished difference. Result has 325 places, 416 transitions, 9295 flow [2023-09-01 11:48:48,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8851, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9295, PETRI_PLACES=325, PETRI_TRANSITIONS=416} [2023-09-01 11:48:48,584 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 299 predicate places. [2023-09-01 11:48:48,584 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 416 transitions, 9295 flow [2023-09-01 11:48:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.6153846153846) internal successors, (1997), 13 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:48,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:48,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:48,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-09-01 11:48:48,585 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:48,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash -204890007, now seen corresponding path program 13 times [2023-09-01 11:48:48,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:48,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127995478] [2023-09-01 11:48:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:48,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127995478] [2023-09-01 11:48:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127995478] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:48,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:48,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670259722] [2023-09-01 11:48:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:48,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:49,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:49,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 416 transitions, 9295 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:49,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:49,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:49,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:50,082 INFO L130 PetriNetUnfolder]: 1583/2905 cut-off events. [2023-09-01 11:48:50,082 INFO L131 PetriNetUnfolder]: For 48230/48230 co-relation queries the response was YES. [2023-09-01 11:48:50,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23217 conditions, 2905 events. 1583/2905 cut-off events. For 48230/48230 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17662 event pairs, 115 based on Foata normal form. 3/2908 useless extension candidates. Maximal degree in co-relation 23059. Up to 735 conditions per place. [2023-09-01 11:48:50,110 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 212 selfloop transitions, 270 changer transitions 5/487 dead transitions. [2023-09-01 11:48:50,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 487 transitions, 10805 flow [2023-09-01 11:48:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3544 transitions. [2023-09-01 11:48:50,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39290465631929045 [2023-09-01 11:48:50,113 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3544 transitions. [2023-09-01 11:48:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3544 transitions. [2023-09-01 11:48:50,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3544 transitions. [2023-09-01 11:48:50,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 161.0909090909091) internal successors, (3544), 22 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:50,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:50,119 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:50,119 INFO L175 Difference]: Start difference. First operand has 325 places, 416 transitions, 9295 flow. Second operand 22 states and 3544 transitions. [2023-09-01 11:48:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 487 transitions, 10805 flow [2023-09-01 11:48:50,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 487 transitions, 10273 flow, removed 15 selfloop flow, removed 19 redundant places. [2023-09-01 11:48:50,293 INFO L231 Difference]: Finished difference. Result has 327 places, 421 transitions, 9474 flow [2023-09-01 11:48:50,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9474, PETRI_PLACES=327, PETRI_TRANSITIONS=421} [2023-09-01 11:48:50,294 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 301 predicate places. [2023-09-01 11:48:50,294 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 421 transitions, 9474 flow [2023-09-01 11:48:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:50,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:50,294 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-09-01 11:48:50,294 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:50,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash 314959577, now seen corresponding path program 14 times [2023-09-01 11:48:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:50,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453529741] [2023-09-01 11:48:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453529741] [2023-09-01 11:48:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453529741] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:50,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:50,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196764238] [2023-09-01 11:48:50,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:51,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:51,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 421 transitions, 9474 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:51,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:51,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:52,057 INFO L130 PetriNetUnfolder]: 1580/2894 cut-off events. [2023-09-01 11:48:52,058 INFO L131 PetriNetUnfolder]: For 47247/47247 co-relation queries the response was YES. [2023-09-01 11:48:52,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23201 conditions, 2894 events. 1580/2894 cut-off events. For 47247/47247 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17550 event pairs, 212 based on Foata normal form. 3/2897 useless extension candidates. Maximal degree in co-relation 23043. Up to 1103 conditions per place. [2023-09-01 11:48:52,090 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 292 selfloop transitions, 161 changer transitions 13/466 dead transitions. [2023-09-01 11:48:52,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 466 transitions, 10657 flow [2023-09-01 11:48:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:48:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:48:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2265 transitions. [2023-09-01 11:48:52,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945993031358885 [2023-09-01 11:48:52,094 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2265 transitions. [2023-09-01 11:48:52,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2265 transitions. [2023-09-01 11:48:52,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:52,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2265 transitions. [2023-09-01 11:48:52,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.78571428571428) internal successors, (2265), 14 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:52,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:52,098 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:52,098 INFO L175 Difference]: Start difference. First operand has 327 places, 421 transitions, 9474 flow. Second operand 14 states and 2265 transitions. [2023-09-01 11:48:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 466 transitions, 10657 flow [2023-09-01 11:48:52,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 466 transitions, 10137 flow, removed 5 selfloop flow, removed 19 redundant places. [2023-09-01 11:48:52,327 INFO L231 Difference]: Finished difference. Result has 324 places, 419 transitions, 9234 flow [2023-09-01 11:48:52,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9234, PETRI_PLACES=324, PETRI_TRANSITIONS=419} [2023-09-01 11:48:52,328 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 298 predicate places. [2023-09-01 11:48:52,328 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 419 transitions, 9234 flow [2023-09-01 11:48:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:52,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:52,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-09-01 11:48:52,329 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:52,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1133666139, now seen corresponding path program 15 times [2023-09-01 11:48:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:52,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114965296] [2023-09-01 11:48:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:52,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:48:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114965296] [2023-09-01 11:48:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114965296] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559999695] [2023-09-01 11:48:52,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:48:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:52,989 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) [2023-09-01 11:48:52,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 11:48:53,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:48:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:48:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:53,456 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:48:53,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:48:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:53,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559999695] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:53,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:53,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 27 [2023-09-01 11:48:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524064381] [2023-09-01 11:48:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:53,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-09-01 11:48:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:48:53,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 419 transitions, 9234 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:53,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:53,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:48:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:54,627 INFO L130 PetriNetUnfolder]: 1583/2899 cut-off events. [2023-09-01 11:48:54,628 INFO L131 PetriNetUnfolder]: For 47173/47173 co-relation queries the response was YES. [2023-09-01 11:48:54,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23043 conditions, 2899 events. 1583/2899 cut-off events. For 47173/47173 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17648 event pairs, 214 based on Foata normal form. 3/2902 useless extension candidates. Maximal degree in co-relation 22883. Up to 1487 conditions per place. [2023-09-01 11:48:54,655 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 311 selfloop transitions, 136 changer transitions 10/457 dead transitions. [2023-09-01 11:48:54,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 457 transitions, 10481 flow [2023-09-01 11:48:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:48:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:48:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1937 transitions. [2023-09-01 11:48:54,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936991869918699 [2023-09-01 11:48:54,657 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1937 transitions. [2023-09-01 11:48:54,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1937 transitions. [2023-09-01 11:48:54,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:54,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1937 transitions. [2023-09-01 11:48:54,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.41666666666666) internal successors, (1937), 12 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:54,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:54,661 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:54,661 INFO L175 Difference]: Start difference. First operand has 324 places, 419 transitions, 9234 flow. Second operand 12 states and 1937 transitions. [2023-09-01 11:48:54,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 457 transitions, 10481 flow [2023-09-01 11:48:54,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 457 transitions, 10139 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-09-01 11:48:54,837 INFO L231 Difference]: Finished difference. Result has 321 places, 422 transitions, 9277 flow [2023-09-01 11:48:54,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9277, PETRI_PLACES=321, PETRI_TRANSITIONS=422} [2023-09-01 11:48:54,837 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 295 predicate places. [2023-09-01 11:48:54,837 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 422 transitions, 9277 flow [2023-09-01 11:48:54,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:54,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:54,838 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:54,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 11:48:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 11:48:55,044 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:55,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -821144427, now seen corresponding path program 16 times [2023-09-01 11:48:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:55,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639880785] [2023-09-01 11:48:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639880785] [2023-09-01 11:48:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639880785] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:55,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:55,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:48:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879349399] [2023-09-01 11:48:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:55,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:48:55,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:48:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:48:55,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:48:55,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 422 transitions, 9277 flow. Second operand has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:55,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:55,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:48:55,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:56,546 INFO L130 PetriNetUnfolder]: 1579/2882 cut-off events. [2023-09-01 11:48:56,546 INFO L131 PetriNetUnfolder]: For 47057/47057 co-relation queries the response was YES. [2023-09-01 11:48:56,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 2882 events. 1579/2882 cut-off events. For 47057/47057 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17435 event pairs, 113 based on Foata normal form. 2/2884 useless extension candidates. Maximal degree in co-relation 22717. Up to 735 conditions per place. [2023-09-01 11:48:56,574 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 247 selfloop transitions, 231 changer transitions 5/483 dead transitions. [2023-09-01 11:48:56,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 483 transitions, 10605 flow [2023-09-01 11:48:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:48:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:48:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2734 transitions. [2023-09-01 11:48:56,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39225251076040174 [2023-09-01 11:48:56,576 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2734 transitions. [2023-09-01 11:48:56,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2734 transitions. [2023-09-01 11:48:56,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:56,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2734 transitions. [2023-09-01 11:48:56,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.8235294117647) internal successors, (2734), 17 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:56,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 410.0) internal successors, (7380), 18 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:56,581 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 410.0) internal successors, (7380), 18 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:56,581 INFO L175 Difference]: Start difference. First operand has 321 places, 422 transitions, 9277 flow. Second operand 17 states and 2734 transitions. [2023-09-01 11:48:56,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 483 transitions, 10605 flow [2023-09-01 11:48:56,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 483 transitions, 10376 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-09-01 11:48:56,752 INFO L231 Difference]: Finished difference. Result has 328 places, 421 transitions, 9501 flow [2023-09-01 11:48:56,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9501, PETRI_PLACES=328, PETRI_TRANSITIONS=421} [2023-09-01 11:48:56,752 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 302 predicate places. [2023-09-01 11:48:56,752 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 421 transitions, 9501 flow [2023-09-01 11:48:56,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:56,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:56,753 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:56,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-09-01 11:48:56,753 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:56,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1523939993, now seen corresponding path program 17 times [2023-09-01 11:48:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:56,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515330975] [2023-09-01 11:48:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:48:57,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515330975] [2023-09-01 11:48:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515330975] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:48:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-09-01 11:48:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300838934] [2023-09-01 11:48:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 11:48:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 11:48:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:48:57,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 410 [2023-09-01 11:48:57,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 421 transitions, 9501 flow. Second operand has 14 states, 14 states have (on average 152.5) internal successors, (2135), 14 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:57,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:57,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 410 [2023-09-01 11:48:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:59,210 INFO L130 PetriNetUnfolder]: 1650/3011 cut-off events. [2023-09-01 11:48:59,211 INFO L131 PetriNetUnfolder]: For 52243/52243 co-relation queries the response was YES. [2023-09-01 11:48:59,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23982 conditions, 3011 events. 1650/3011 cut-off events. For 52243/52243 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18530 event pairs, 109 based on Foata normal form. 32/3043 useless extension candidates. Maximal degree in co-relation 23824. Up to 1449 conditions per place. [2023-09-01 11:48:59,239 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 295 selfloop transitions, 232 changer transitions 7/534 dead transitions. [2023-09-01 11:48:59,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 534 transitions, 11945 flow [2023-09-01 11:48:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:48:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:48:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3017 transitions. [2023-09-01 11:48:59,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872913992297818 [2023-09-01 11:48:59,241 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3017 transitions. [2023-09-01 11:48:59,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3017 transitions. [2023-09-01 11:48:59,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:59,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3017 transitions. [2023-09-01 11:48:59,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 158.78947368421052) internal successors, (3017), 19 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:59,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:59,247 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:59,247 INFO L175 Difference]: Start difference. First operand has 328 places, 421 transitions, 9501 flow. Second operand 19 states and 3017 transitions. [2023-09-01 11:48:59,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 534 transitions, 11945 flow [2023-09-01 11:48:59,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 534 transitions, 11311 flow, removed 4 selfloop flow, removed 20 redundant places. [2023-09-01 11:48:59,442 INFO L231 Difference]: Finished difference. Result has 332 places, 452 transitions, 10277 flow [2023-09-01 11:48:59,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=8866, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10277, PETRI_PLACES=332, PETRI_TRANSITIONS=452} [2023-09-01 11:48:59,442 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 306 predicate places. [2023-09-01 11:48:59,443 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 452 transitions, 10277 flow [2023-09-01 11:48:59,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 152.5) internal successors, (2135), 14 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:59,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:59,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-09-01 11:48:59,443 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:48:59,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2078706087, now seen corresponding path program 18 times [2023-09-01 11:48:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:59,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075711194] [2023-09-01 11:48:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:59,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:49:00,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:00,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075711194] [2023-09-01 11:49:00,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075711194] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:00,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126313016] [2023-09-01 11:49:00,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:49:00,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:00,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:00,228 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) [2023-09-01 11:49:00,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 11:49:00,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 11:49:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:49:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:49:00,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:49:00,717 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:49:00,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2023-09-01 11:49:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:00,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:49:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126313016] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:00,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:49:00,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 26 [2023-09-01 11:49:00,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125022517] [2023-09-01 11:49:00,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:00,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:49:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:49:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:49:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:49:01,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 452 transitions, 10277 flow. Second operand has 12 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:01,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:01,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:49:01,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:02,321 INFO L130 PetriNetUnfolder]: 1764/3177 cut-off events. [2023-09-01 11:49:02,321 INFO L131 PetriNetUnfolder]: For 52025/52025 co-relation queries the response was YES. [2023-09-01 11:49:02,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25471 conditions, 3177 events. 1764/3177 cut-off events. For 52025/52025 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19356 event pairs, 184 based on Foata normal form. 5/3182 useless extension candidates. Maximal degree in co-relation 25309. Up to 1545 conditions per place. [2023-09-01 11:49:02,356 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 309 selfloop transitions, 186 changer transitions 11/506 dead transitions. [2023-09-01 11:49:02,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 506 transitions, 11736 flow [2023-09-01 11:49:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:49:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:49:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1613 transitions. [2023-09-01 11:49:02,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934146341463415 [2023-09-01 11:49:02,357 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1613 transitions. [2023-09-01 11:49:02,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1613 transitions. [2023-09-01 11:49:02,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:02,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1613 transitions. [2023-09-01 11:49:02,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.3) internal successors, (1613), 10 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:02,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:02,360 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:02,360 INFO L175 Difference]: Start difference. First operand has 332 places, 452 transitions, 10277 flow. Second operand 10 states and 1613 transitions. [2023-09-01 11:49:02,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 506 transitions, 11736 flow [2023-09-01 11:49:02,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 506 transitions, 11372 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-09-01 11:49:02,655 INFO L231 Difference]: Finished difference. Result has 334 places, 456 transitions, 10436 flow [2023-09-01 11:49:02,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=9921, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10436, PETRI_PLACES=334, PETRI_TRANSITIONS=456} [2023-09-01 11:49:02,656 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 308 predicate places. [2023-09-01 11:49:02,656 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 456 transitions, 10436 flow [2023-09-01 11:49:02,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.75) internal successors, (1845), 12 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:02,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:02,656 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:02,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 11:49:02,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:02,861 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:02,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1296520111, now seen corresponding path program 19 times [2023-09-01 11:49:02,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:02,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253406831] [2023-09-01 11:49:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:02,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253406831] [2023-09-01 11:49:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253406831] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:03,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:03,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:49:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303323092] [2023-09-01 11:49:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:49:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:03,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:49:03,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:49:03,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:49:03,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 456 transitions, 10436 flow. Second operand has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:03,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:03,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:49:03,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:04,476 INFO L130 PetriNetUnfolder]: 1760/3173 cut-off events. [2023-09-01 11:49:04,480 INFO L131 PetriNetUnfolder]: For 54282/54282 co-relation queries the response was YES. [2023-09-01 11:49:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25677 conditions, 3173 events. 1760/3173 cut-off events. For 54282/54282 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19319 event pairs, 124 based on Foata normal form. 1/3174 useless extension candidates. Maximal degree in co-relation 25515. Up to 706 conditions per place. [2023-09-01 11:49:04,512 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 234 selfloop transitions, 307 changer transitions 5/546 dead transitions. [2023-09-01 11:49:04,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 546 transitions, 12286 flow [2023-09-01 11:49:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:49:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:49:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3077 transitions. [2023-09-01 11:49:04,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949935815147625 [2023-09-01 11:49:04,514 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3077 transitions. [2023-09-01 11:49:04,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3077 transitions. [2023-09-01 11:49:04,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:04,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3077 transitions. [2023-09-01 11:49:04,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 161.94736842105263) internal successors, (3077), 19 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:04,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:04,520 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:04,520 INFO L175 Difference]: Start difference. First operand has 334 places, 456 transitions, 10436 flow. Second operand 19 states and 3077 transitions. [2023-09-01 11:49:04,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 546 transitions, 12286 flow [2023-09-01 11:49:04,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 546 transitions, 11938 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-09-01 11:49:04,732 INFO L231 Difference]: Finished difference. Result has 345 places, 474 transitions, 11062 flow [2023-09-01 11:49:04,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=10107, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11062, PETRI_PLACES=345, PETRI_TRANSITIONS=474} [2023-09-01 11:49:04,733 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 319 predicate places. [2023-09-01 11:49:04,733 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 474 transitions, 11062 flow [2023-09-01 11:49:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:04,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:04,733 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-09-01 11:49:04,733 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:04,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -305542235, now seen corresponding path program 20 times [2023-09-01 11:49:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633569089] [2023-09-01 11:49:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:04,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:05,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:05,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633569089] [2023-09-01 11:49:05,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633569089] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:05,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:05,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-09-01 11:49:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395883858] [2023-09-01 11:49:05,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:05,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 11:49:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 11:49:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:49:05,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 410 [2023-09-01 11:49:05,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 474 transitions, 11062 flow. Second operand has 14 states, 14 states have (on average 149.5) internal successors, (2093), 14 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:05,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:05,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 410 [2023-09-01 11:49:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:07,454 INFO L130 PetriNetUnfolder]: 1944/3545 cut-off events. [2023-09-01 11:49:07,454 INFO L131 PetriNetUnfolder]: For 63937/63937 co-relation queries the response was YES. [2023-09-01 11:49:07,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28690 conditions, 3545 events. 1944/3545 cut-off events. For 63937/63937 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 22452 event pairs, 170 based on Foata normal form. 5/3550 useless extension candidates. Maximal degree in co-relation 28526. Up to 598 conditions per place. [2023-09-01 11:49:07,496 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 288 selfloop transitions, 369 changer transitions 8/665 dead transitions. [2023-09-01 11:49:07,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 665 transitions, 14359 flow [2023-09-01 11:49:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:49:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:49:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4069 transitions. [2023-09-01 11:49:07,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38170731707317074 [2023-09-01 11:49:07,499 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4069 transitions. [2023-09-01 11:49:07,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4069 transitions. [2023-09-01 11:49:07,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:07,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4069 transitions. [2023-09-01 11:49:07,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 156.5) internal successors, (4069), 26 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,506 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 410.0) internal successors, (11070), 27 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,507 INFO L175 Difference]: Start difference. First operand has 345 places, 474 transitions, 11062 flow. Second operand 26 states and 4069 transitions. [2023-09-01 11:49:07,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 665 transitions, 14359 flow [2023-09-01 11:49:07,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 665 transitions, 13941 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-09-01 11:49:07,782 INFO L231 Difference]: Finished difference. Result has 372 places, 513 transitions, 12575 flow [2023-09-01 11:49:07,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=10746, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12575, PETRI_PLACES=372, PETRI_TRANSITIONS=513} [2023-09-01 11:49:07,783 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 346 predicate places. [2023-09-01 11:49:07,783 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 513 transitions, 12575 flow [2023-09-01 11:49:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 149.5) internal successors, (2093), 14 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:07,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-09-01 11:49:07,784 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:07,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash 830388595, now seen corresponding path program 21 times [2023-09-01 11:49:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:07,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934630875] [2023-09-01 11:49:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934630875] [2023-09-01 11:49:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934630875] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:08,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-09-01 11:49:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283651470] [2023-09-01 11:49:08,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:08,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 11:49:08,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:08,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 11:49:08,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-09-01 11:49:09,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 410 [2023-09-01 11:49:09,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 513 transitions, 12575 flow. Second operand has 14 states, 14 states have (on average 150.5) internal successors, (2107), 14 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:09,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:09,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 410 [2023-09-01 11:49:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:10,519 INFO L130 PetriNetUnfolder]: 1945/3548 cut-off events. [2023-09-01 11:49:10,519 INFO L131 PetriNetUnfolder]: For 69196/69196 co-relation queries the response was YES. [2023-09-01 11:49:10,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30014 conditions, 3548 events. 1945/3548 cut-off events. For 69196/69196 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22491 event pairs, 154 based on Foata normal form. 2/3550 useless extension candidates. Maximal degree in co-relation 29839. Up to 781 conditions per place. [2023-09-01 11:49:10,558 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 243 selfloop transitions, 352 changer transitions 7/602 dead transitions. [2023-09-01 11:49:10,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 602 transitions, 14358 flow [2023-09-01 11:49:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:49:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:49:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3438 transitions. [2023-09-01 11:49:10,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811529933481153 [2023-09-01 11:49:10,561 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3438 transitions. [2023-09-01 11:49:10,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3438 transitions. [2023-09-01 11:49:10,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:10,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3438 transitions. [2023-09-01 11:49:10,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 156.27272727272728) internal successors, (3438), 22 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:10,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:10,567 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:10,567 INFO L175 Difference]: Start difference. First operand has 372 places, 513 transitions, 12575 flow. Second operand 22 states and 3438 transitions. [2023-09-01 11:49:10,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 602 transitions, 14358 flow [2023-09-01 11:49:10,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 602 transitions, 13772 flow, removed 87 selfloop flow, removed 13 redundant places. [2023-09-01 11:49:10,868 INFO L231 Difference]: Finished difference. Result has 381 places, 513 transitions, 12805 flow [2023-09-01 11:49:10,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12019, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12805, PETRI_PLACES=381, PETRI_TRANSITIONS=513} [2023-09-01 11:49:10,869 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 355 predicate places. [2023-09-01 11:49:10,869 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 513 transitions, 12805 flow [2023-09-01 11:49:10,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 150.5) internal successors, (2107), 14 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:10,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:10,870 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-09-01 11:49:10,870 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:10,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:10,870 INFO L85 PathProgramCache]: Analyzing trace with hash 327894257, now seen corresponding path program 22 times [2023-09-01 11:49:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:10,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71366678] [2023-09-01 11:49:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71366678] [2023-09-01 11:49:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71366678] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:11,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:49:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705878523] [2023-09-01 11:49:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:49:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:49:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:49:12,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 410 [2023-09-01 11:49:12,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 513 transitions, 12805 flow. Second operand has 13 states, 13 states have (on average 150.6153846153846) internal successors, (1958), 13 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:12,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:12,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 410 [2023-09-01 11:49:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:13,250 INFO L130 PetriNetUnfolder]: 1917/3510 cut-off events. [2023-09-01 11:49:13,251 INFO L131 PetriNetUnfolder]: For 75113/75113 co-relation queries the response was YES. [2023-09-01 11:49:13,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29738 conditions, 3510 events. 1917/3510 cut-off events. For 75113/75113 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 22293 event pairs, 252 based on Foata normal form. 14/3524 useless extension candidates. Maximal degree in co-relation 29566. Up to 1344 conditions per place. [2023-09-01 11:49:13,289 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 308 selfloop transitions, 254 changer transitions 9/571 dead transitions. [2023-09-01 11:49:13,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 571 transitions, 14231 flow [2023-09-01 11:49:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:49:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:49:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2811 transitions. [2023-09-01 11:49:13,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38089430894308945 [2023-09-01 11:49:13,291 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2811 transitions. [2023-09-01 11:49:13,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2811 transitions. [2023-09-01 11:49:13,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:13,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2811 transitions. [2023-09-01 11:49:13,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 156.16666666666666) internal successors, (2811), 18 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:13,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 410.0) internal successors, (7790), 19 states have internal predecessors, (7790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:13,296 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 410.0) internal successors, (7790), 19 states have internal predecessors, (7790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:13,296 INFO L175 Difference]: Start difference. First operand has 381 places, 513 transitions, 12805 flow. Second operand 18 states and 2811 transitions. [2023-09-01 11:49:13,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 571 transitions, 14231 flow [2023-09-01 11:49:13,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 571 transitions, 13653 flow, removed 6 selfloop flow, removed 18 redundant places. [2023-09-01 11:49:13,667 INFO L231 Difference]: Finished difference. Result has 381 places, 509 transitions, 12701 flow [2023-09-01 11:49:13,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12168, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12701, PETRI_PLACES=381, PETRI_TRANSITIONS=509} [2023-09-01 11:49:13,668 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 355 predicate places. [2023-09-01 11:49:13,668 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 509 transitions, 12701 flow [2023-09-01 11:49:13,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 150.6153846153846) internal successors, (1958), 13 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:13,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:13,668 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-09-01 11:49:13,669 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:13,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:13,669 INFO L85 PathProgramCache]: Analyzing trace with hash 411107351, now seen corresponding path program 23 times [2023-09-01 11:49:13,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:13,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092618032] [2023-09-01 11:49:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092618032] [2023-09-01 11:49:13,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092618032] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:13,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-09-01 11:49:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036754424] [2023-09-01 11:49:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:49:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:49:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:49:14,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:49:14,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 509 transitions, 12701 flow. Second operand has 11 states, 11 states have (on average 157.9090909090909) internal successors, (1737), 11 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:14,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:14,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:49:14,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:15,140 INFO L130 PetriNetUnfolder]: 1908/3478 cut-off events. [2023-09-01 11:49:15,141 INFO L131 PetriNetUnfolder]: For 73883/73883 co-relation queries the response was YES. [2023-09-01 11:49:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29632 conditions, 3478 events. 1908/3478 cut-off events. For 73883/73883 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21827 event pairs, 134 based on Foata normal form. 1/3479 useless extension candidates. Maximal degree in co-relation 29459. Up to 937 conditions per place. [2023-09-01 11:49:15,179 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 247 selfloop transitions, 305 changer transitions 6/558 dead transitions. [2023-09-01 11:49:15,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 558 transitions, 14154 flow [2023-09-01 11:49:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:49:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:49:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2292 transitions. [2023-09-01 11:49:15,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39930313588850175 [2023-09-01 11:49:15,181 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2292 transitions. [2023-09-01 11:49:15,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2292 transitions. [2023-09-01 11:49:15,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:15,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2292 transitions. [2023-09-01 11:49:15,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.71428571428572) internal successors, (2292), 14 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:15,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:15,185 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:15,185 INFO L175 Difference]: Start difference. First operand has 381 places, 509 transitions, 12701 flow. Second operand 14 states and 2292 transitions. [2023-09-01 11:49:15,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 558 transitions, 14154 flow [2023-09-01 11:49:15,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 558 transitions, 13748 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-09-01 11:49:15,532 INFO L231 Difference]: Finished difference. Result has 381 places, 511 transitions, 13058 flow [2023-09-01 11:49:15,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12301, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13058, PETRI_PLACES=381, PETRI_TRANSITIONS=511} [2023-09-01 11:49:15,533 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 355 predicate places. [2023-09-01 11:49:15,533 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 511 transitions, 13058 flow [2023-09-01 11:49:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.9090909090909) internal successors, (1737), 11 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:15,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:15,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-09-01 11:49:15,534 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:15,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2039877833, now seen corresponding path program 24 times [2023-09-01 11:49:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:15,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105811686] [2023-09-01 11:49:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105811686] [2023-09-01 11:49:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105811686] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:15,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:49:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781377644] [2023-09-01 11:49:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:15,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:49:15,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:15,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:49:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:49:16,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:49:16,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 511 transitions, 13058 flow. Second operand has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:16,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:16,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:49:16,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:17,416 INFO L130 PetriNetUnfolder]: 1910/3484 cut-off events. [2023-09-01 11:49:17,417 INFO L131 PetriNetUnfolder]: For 75641/75641 co-relation queries the response was YES. [2023-09-01 11:49:17,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30108 conditions, 3484 events. 1910/3484 cut-off events. For 75641/75641 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21909 event pairs, 119 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 29934. Up to 777 conditions per place. [2023-09-01 11:49:17,509 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 247 selfloop transitions, 337 changer transitions 5/589 dead transitions. [2023-09-01 11:49:17,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 589 transitions, 14776 flow [2023-09-01 11:49:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:49:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:49:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3086 transitions. [2023-09-01 11:49:17,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39614890885750964 [2023-09-01 11:49:17,511 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3086 transitions. [2023-09-01 11:49:17,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3086 transitions. [2023-09-01 11:49:17,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:17,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3086 transitions. [2023-09-01 11:49:17,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.42105263157896) internal successors, (3086), 19 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:17,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:17,521 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 410.0) internal successors, (8200), 20 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:17,521 INFO L175 Difference]: Start difference. First operand has 381 places, 511 transitions, 13058 flow. Second operand 19 states and 3086 transitions. [2023-09-01 11:49:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 589 transitions, 14776 flow [2023-09-01 11:49:17,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 589 transitions, 14339 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 11:49:17,813 INFO L231 Difference]: Finished difference. Result has 392 places, 514 transitions, 13401 flow [2023-09-01 11:49:17,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12632, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13401, PETRI_PLACES=392, PETRI_TRANSITIONS=514} [2023-09-01 11:49:17,813 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 366 predicate places. [2023-09-01 11:49:17,814 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 514 transitions, 13401 flow [2023-09-01 11:49:17,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:17,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:17,814 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-09-01 11:49:17,814 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:17,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -197376943, now seen corresponding path program 25 times [2023-09-01 11:49:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:17,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069289304] [2023-09-01 11:49:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069289304] [2023-09-01 11:49:18,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069289304] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:18,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:18,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:49:18,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931653430] [2023-09-01 11:49:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:49:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:49:18,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:49:18,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 410 [2023-09-01 11:49:18,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 514 transitions, 13401 flow. Second operand has 13 states, 13 states have (on average 152.6153846153846) internal successors, (1984), 13 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:18,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:18,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 410 [2023-09-01 11:49:18,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:19,834 INFO L130 PetriNetUnfolder]: 1909/3477 cut-off events. [2023-09-01 11:49:19,835 INFO L131 PetriNetUnfolder]: For 78157/78157 co-relation queries the response was YES. [2023-09-01 11:49:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30636 conditions, 3477 events. 1909/3477 cut-off events. For 78157/78157 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21812 event pairs, 136 based on Foata normal form. 1/3478 useless extension candidates. Maximal degree in co-relation 30461. Up to 937 conditions per place. [2023-09-01 11:49:19,867 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 233 selfloop transitions, 326 changer transitions 6/565 dead transitions. [2023-09-01 11:49:19,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 565 transitions, 14816 flow [2023-09-01 11:49:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:49:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:49:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2680 transitions. [2023-09-01 11:49:19,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38450502152080346 [2023-09-01 11:49:19,870 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2680 transitions. [2023-09-01 11:49:19,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2680 transitions. [2023-09-01 11:49:19,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:19,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2680 transitions. [2023-09-01 11:49:19,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 157.64705882352942) internal successors, (2680), 17 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:19,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 410.0) internal successors, (7380), 18 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:19,874 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 410.0) internal successors, (7380), 18 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:19,874 INFO L175 Difference]: Start difference. First operand has 392 places, 514 transitions, 13401 flow. Second operand 17 states and 2680 transitions. [2023-09-01 11:49:19,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 565 transitions, 14816 flow [2023-09-01 11:49:20,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 565 transitions, 14215 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-09-01 11:49:20,158 INFO L231 Difference]: Finished difference. Result has 394 places, 514 transitions, 13487 flow [2023-09-01 11:49:20,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12806, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13487, PETRI_PLACES=394, PETRI_TRANSITIONS=514} [2023-09-01 11:49:20,159 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 368 predicate places. [2023-09-01 11:49:20,159 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 514 transitions, 13487 flow [2023-09-01 11:49:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.6153846153846) internal successors, (1984), 13 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:20,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:20,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:20,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-09-01 11:49:20,159 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:20,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash -896136115, now seen corresponding path program 26 times [2023-09-01 11:49:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:20,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811125962] [2023-09-01 11:49:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811125962] [2023-09-01 11:49:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811125962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:20,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:49:20,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848451152] [2023-09-01 11:49:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:20,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:49:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:49:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:49:20,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:49:20,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 514 transitions, 13487 flow. Second operand has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:20,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:20,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:49:20,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:22,115 INFO L130 PetriNetUnfolder]: 1972/3597 cut-off events. [2023-09-01 11:49:22,115 INFO L131 PetriNetUnfolder]: For 77607/77607 co-relation queries the response was YES. [2023-09-01 11:49:22,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31571 conditions, 3597 events. 1972/3597 cut-off events. For 77607/77607 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 22759 event pairs, 203 based on Foata normal form. 4/3601 useless extension candidates. Maximal degree in co-relation 31396. Up to 1102 conditions per place. [2023-09-01 11:49:22,155 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 390 selfloop transitions, 221 changer transitions 7/618 dead transitions. [2023-09-01 11:49:22,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 618 transitions, 15610 flow [2023-09-01 11:49:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:49:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:49:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3534 transitions. [2023-09-01 11:49:22,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917960088691796 [2023-09-01 11:49:22,159 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3534 transitions. [2023-09-01 11:49:22,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3534 transitions. [2023-09-01 11:49:22,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:22,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3534 transitions. [2023-09-01 11:49:22,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 160.63636363636363) internal successors, (3534), 22 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:22,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:22,165 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 410.0) internal successors, (9430), 23 states have internal predecessors, (9430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:22,165 INFO L175 Difference]: Start difference. First operand has 394 places, 514 transitions, 13487 flow. Second operand 22 states and 3534 transitions. [2023-09-01 11:49:22,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 618 transitions, 15610 flow [2023-09-01 11:49:22,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 618 transitions, 14912 flow, removed 5 selfloop flow, removed 15 redundant places. [2023-09-01 11:49:22,492 INFO L231 Difference]: Finished difference. Result has 404 places, 526 transitions, 13670 flow [2023-09-01 11:49:22,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=12821, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13670, PETRI_PLACES=404, PETRI_TRANSITIONS=526} [2023-09-01 11:49:22,493 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 378 predicate places. [2023-09-01 11:49:22,493 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 526 transitions, 13670 flow [2023-09-01 11:49:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.6153846153846) internal successors, (2010), 13 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:22,493 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:22,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-09-01 11:49:22,494 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:22,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash 424796825, now seen corresponding path program 27 times [2023-09-01 11:49:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935249165] [2023-09-01 11:49:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:22,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935249165] [2023-09-01 11:49:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935249165] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:49:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965864315] [2023-09-01 11:49:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:22,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:49:22,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:49:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:49:23,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:49:23,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 526 transitions, 13670 flow. Second operand has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:23,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:23,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:49:23,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:24,374 INFO L130 PetriNetUnfolder]: 1976/3609 cut-off events. [2023-09-01 11:49:24,375 INFO L131 PetriNetUnfolder]: For 78647/78647 co-relation queries the response was YES. [2023-09-01 11:49:24,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32146 conditions, 3609 events. 1976/3609 cut-off events. For 78647/78647 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 22865 event pairs, 179 based on Foata normal form. 1/3610 useless extension candidates. Maximal degree in co-relation 31967. Up to 1195 conditions per place. [2023-09-01 11:49:24,411 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 372 selfloop transitions, 223 changer transitions 5/600 dead transitions. [2023-09-01 11:49:24,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 600 transitions, 15349 flow [2023-09-01 11:49:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 11:49:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 11:49:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3384 transitions. [2023-09-01 11:49:24,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39303135888501745 [2023-09-01 11:49:24,413 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3384 transitions. [2023-09-01 11:49:24,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3384 transitions. [2023-09-01 11:49:24,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:24,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3384 transitions. [2023-09-01 11:49:24,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.14285714285714) internal successors, (3384), 21 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:24,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 410.0) internal successors, (9020), 22 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:24,419 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 410.0) internal successors, (9020), 22 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:24,419 INFO L175 Difference]: Start difference. First operand has 404 places, 526 transitions, 13670 flow. Second operand 21 states and 3384 transitions. [2023-09-01 11:49:24,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 600 transitions, 15349 flow [2023-09-01 11:49:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 600 transitions, 15000 flow, removed 55 selfloop flow, removed 13 redundant places. [2023-09-01 11:49:24,737 INFO L231 Difference]: Finished difference. Result has 412 places, 528 transitions, 13847 flow [2023-09-01 11:49:24,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=13339, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13847, PETRI_PLACES=412, PETRI_TRANSITIONS=528} [2023-09-01 11:49:24,738 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 386 predicate places. [2023-09-01 11:49:24,738 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 528 transitions, 13847 flow [2023-09-01 11:49:24,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.6153846153846) internal successors, (2023), 13 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:24,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:24,738 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:24,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-09-01 11:49:24,739 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:24,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1572709157, now seen corresponding path program 28 times [2023-09-01 11:49:24,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:24,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056139580] [2023-09-01 11:49:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:24,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:25,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056139580] [2023-09-01 11:49:25,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056139580] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:25,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:49:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458536779] [2023-09-01 11:49:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:49:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:49:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:49:25,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:49:25,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 528 transitions, 13847 flow. Second operand has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:25,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:25,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:49:25,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:26,665 INFO L130 PetriNetUnfolder]: 1975/3602 cut-off events. [2023-09-01 11:49:26,665 INFO L131 PetriNetUnfolder]: For 78344/78344 co-relation queries the response was YES. [2023-09-01 11:49:26,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32307 conditions, 3602 events. 1975/3602 cut-off events. For 78344/78344 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22769 event pairs, 40 based on Foata normal form. 1/3603 useless extension candidates. Maximal degree in co-relation 32127. Up to 826 conditions per place. [2023-09-01 11:49:26,706 INFO L137 encePairwiseOnDemand]: 397/410 looper letters, 259 selfloop transitions, 371 changer transitions 8/638 dead transitions. [2023-09-01 11:49:26,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 638 transitions, 16254 flow [2023-09-01 11:49:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 11:49:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 11:49:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3712 transitions. [2023-09-01 11:49:26,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936373276776246 [2023-09-01 11:49:26,709 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3712 transitions. [2023-09-01 11:49:26,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3712 transitions. [2023-09-01 11:49:26,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:26,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3712 transitions. [2023-09-01 11:49:26,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 161.3913043478261) internal successors, (3712), 23 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:26,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 410.0) internal successors, (9840), 24 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:26,715 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 410.0) internal successors, (9840), 24 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:26,715 INFO L175 Difference]: Start difference. First operand has 412 places, 528 transitions, 13847 flow. Second operand 23 states and 3712 transitions. [2023-09-01 11:49:26,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 638 transitions, 16254 flow [2023-09-01 11:49:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 638 transitions, 15864 flow, removed 4 selfloop flow, removed 17 redundant places. [2023-09-01 11:49:27,110 INFO L231 Difference]: Finished difference. Result has 421 places, 548 transitions, 14866 flow [2023-09-01 11:49:27,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=13488, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14866, PETRI_PLACES=421, PETRI_TRANSITIONS=548} [2023-09-01 11:49:27,110 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 395 predicate places. [2023-09-01 11:49:27,110 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 548 transitions, 14866 flow [2023-09-01 11:49:27,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.75) internal successors, (1869), 12 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:27,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:27,111 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-09-01 11:49:27,111 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:27,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash 273531114, now seen corresponding path program 1 times [2023-09-01 11:49:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:27,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385793745] [2023-09-01 11:49:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:27,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385793745] [2023-09-01 11:49:27,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385793745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:27,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943020495] [2023-09-01 11:49:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:27,153 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) [2023-09-01 11:49:27,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 11:49:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 11:49:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:27,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:27,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943020495] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:49:27,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:49:27,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 11:49:27,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201609988] [2023-09-01 11:49:27,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:49:27,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:49:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:27,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:49:27,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-09-01 11:49:27,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 410 [2023-09-01 11:49:27,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 548 transitions, 14866 flow. Second operand has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:27,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:27,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 410 [2023-09-01 11:49:27,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:28,359 INFO L130 PetriNetUnfolder]: 2211/4119 cut-off events. [2023-09-01 11:49:28,360 INFO L131 PetriNetUnfolder]: For 91668/91674 co-relation queries the response was YES. [2023-09-01 11:49:28,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36793 conditions, 4119 events. 2211/4119 cut-off events. For 91668/91674 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 25004 event pairs, 383 based on Foata normal form. 224/4339 useless extension candidates. Maximal degree in co-relation 36607. Up to 1023 conditions per place. [2023-09-01 11:49:28,410 INFO L137 encePairwiseOnDemand]: 405/410 looper letters, 655 selfloop transitions, 94 changer transitions 0/766 dead transitions. [2023-09-01 11:49:28,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 766 transitions, 20400 flow [2023-09-01 11:49:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:49:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:49:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1331 transitions. [2023-09-01 11:49:28,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46376306620209057 [2023-09-01 11:49:28,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1331 transitions. [2023-09-01 11:49:28,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1331 transitions. [2023-09-01 11:49:28,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:28,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1331 transitions. [2023-09-01 11:49:28,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 190.14285714285714) internal successors, (1331), 7 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:28,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:28,414 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 410.0) internal successors, (3280), 8 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:28,414 INFO L175 Difference]: Start difference. First operand has 421 places, 548 transitions, 14866 flow. Second operand 7 states and 1331 transitions. [2023-09-01 11:49:28,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 766 transitions, 20400 flow [2023-09-01 11:49:28,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 766 transitions, 19461 flow, removed 35 selfloop flow, removed 19 redundant places. [2023-09-01 11:49:28,783 INFO L231 Difference]: Finished difference. Result has 411 places, 565 transitions, 14730 flow [2023-09-01 11:49:28,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=14210, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14730, PETRI_PLACES=411, PETRI_TRANSITIONS=565} [2023-09-01 11:49:28,784 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 385 predicate places. [2023-09-01 11:49:28,784 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 565 transitions, 14730 flow [2023-09-01 11:49:28,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:28,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:28,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:28,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 11:49:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:28,989 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:28,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1097738867, now seen corresponding path program 1 times [2023-09-01 11:49:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112889044] [2023-09-01 11:49:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:29,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:29,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112889044] [2023-09-01 11:49:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112889044] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:29,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:29,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:49:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524408911] [2023-09-01 11:49:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:29,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:49:29,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:29,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:49:29,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:49:29,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:49:29,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 565 transitions, 14730 flow. Second operand has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:29,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:29,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:49:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:30,758 INFO L130 PetriNetUnfolder]: 2838/5023 cut-off events. [2023-09-01 11:49:30,758 INFO L131 PetriNetUnfolder]: For 108702/108702 co-relation queries the response was YES. [2023-09-01 11:49:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43516 conditions, 5023 events. 2838/5023 cut-off events. For 108702/108702 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 30024 event pairs, 499 based on Foata normal form. 8/5031 useless extension candidates. Maximal degree in co-relation 43333. Up to 2125 conditions per place. [2023-09-01 11:49:30,824 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 353 selfloop transitions, 299 changer transitions 5/657 dead transitions. [2023-09-01 11:49:30,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 657 transitions, 17245 flow [2023-09-01 11:49:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:49:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:49:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2020 transitions. [2023-09-01 11:49:30,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2023-09-01 11:49:30,826 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2020 transitions. [2023-09-01 11:49:30,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2020 transitions. [2023-09-01 11:49:30,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:30,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2020 transitions. [2023-09-01 11:49:30,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.33333333333334) internal successors, (2020), 12 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:30,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:30,830 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:30,830 INFO L175 Difference]: Start difference. First operand has 411 places, 565 transitions, 14730 flow. Second operand 12 states and 2020 transitions. [2023-09-01 11:49:30,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 657 transitions, 17245 flow [2023-09-01 11:49:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 657 transitions, 17137 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-09-01 11:49:31,332 INFO L231 Difference]: Finished difference. Result has 425 places, 594 transitions, 16252 flow [2023-09-01 11:49:31,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=14602, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16252, PETRI_PLACES=425, PETRI_TRANSITIONS=594} [2023-09-01 11:49:31,343 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 399 predicate places. [2023-09-01 11:49:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 594 transitions, 16252 flow [2023-09-01 11:49:31,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:31,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:31,344 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-09-01 11:49:31,344 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:31,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 218436905, now seen corresponding path program 2 times [2023-09-01 11:49:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651270704] [2023-09-01 11:49:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:31,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:31,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651270704] [2023-09-01 11:49:31,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651270704] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:31,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195744141] [2023-09-01 11:49:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:49:31,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:31,604 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) [2023-09-01 11:49:31,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 11:49:31,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:49:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:49:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:31,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:31,996 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:49:31,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 49 [2023-09-01 11:49:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:32,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195744141] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:49:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9] total 18 [2023-09-01 11:49:32,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765412011] [2023-09-01 11:49:32,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:32,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:49:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:49:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:49:32,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:49:32,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 594 transitions, 16252 flow. Second operand has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:32,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:32,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:49:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:33,389 INFO L130 PetriNetUnfolder]: 2848/5033 cut-off events. [2023-09-01 11:49:33,389 INFO L131 PetriNetUnfolder]: For 118126/118126 co-relation queries the response was YES. [2023-09-01 11:49:33,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45277 conditions, 5033 events. 2848/5033 cut-off events. For 118126/118126 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 29971 event pairs, 618 based on Foata normal form. 8/5041 useless extension candidates. Maximal degree in co-relation 45092. Up to 2903 conditions per place. [2023-09-01 11:49:33,452 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 335 selfloop transitions, 297 changer transitions 0/632 dead transitions. [2023-09-01 11:49:33,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 632 transitions, 17924 flow [2023-09-01 11:49:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:49:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:49:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1399 transitions. [2023-09-01 11:49:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42652439024390243 [2023-09-01 11:49:33,454 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1399 transitions. [2023-09-01 11:49:33,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1399 transitions. [2023-09-01 11:49:33,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:33,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1399 transitions. [2023-09-01 11:49:33,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.875) internal successors, (1399), 8 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:33,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:33,457 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:33,457 INFO L175 Difference]: Start difference. First operand has 425 places, 594 transitions, 16252 flow. Second operand 8 states and 1399 transitions. [2023-09-01 11:49:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 632 transitions, 17924 flow [2023-09-01 11:49:33,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 632 transitions, 17744 flow, removed 27 selfloop flow, removed 7 redundant places. [2023-09-01 11:49:33,958 INFO L231 Difference]: Finished difference. Result has 424 places, 598 transitions, 16844 flow [2023-09-01 11:49:33,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=16072, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16844, PETRI_PLACES=424, PETRI_TRANSITIONS=598} [2023-09-01 11:49:33,959 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 398 predicate places. [2023-09-01 11:49:33,959 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 598 transitions, 16844 flow [2023-09-01 11:49:33,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:33,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:33,959 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:33,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 11:49:34,164 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,SelfDestructingSolverStorable64 [2023-09-01 11:49:34,165 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:34,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -179770209, now seen corresponding path program 3 times [2023-09-01 11:49:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:34,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728522039] [2023-09-01 11:49:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:34,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:34,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:34,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728522039] [2023-09-01 11:49:34,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728522039] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:34,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258253803] [2023-09-01 11:49:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:49:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:34,410 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) [2023-09-01 11:49:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 11:49:34,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:49:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:49:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:34,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:34,805 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:49:34,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 49 [2023-09-01 11:49:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258253803] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:34,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:49:34,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9] total 17 [2023-09-01 11:49:34,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822245798] [2023-09-01 11:49:34,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:34,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:49:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:49:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:49:35,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:49:35,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 598 transitions, 16844 flow. Second operand has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:35,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:35,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:49:35,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:36,335 INFO L130 PetriNetUnfolder]: 2850/5039 cut-off events. [2023-09-01 11:49:36,335 INFO L131 PetriNetUnfolder]: For 123178/123178 co-relation queries the response was YES. [2023-09-01 11:49:36,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46033 conditions, 5039 events. 2850/5039 cut-off events. For 123178/123178 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 30079 event pairs, 634 based on Foata normal form. 4/5043 useless extension candidates. Maximal degree in co-relation 45844. Up to 2907 conditions per place. [2023-09-01 11:49:36,399 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 322 selfloop transitions, 302 changer transitions 0/624 dead transitions. [2023-09-01 11:49:36,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 624 transitions, 18310 flow [2023-09-01 11:49:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:49:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:49:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1391 transitions. [2023-09-01 11:49:36,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240853658536585 [2023-09-01 11:49:36,401 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1391 transitions. [2023-09-01 11:49:36,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1391 transitions. [2023-09-01 11:49:36,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:36,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1391 transitions. [2023-09-01 11:49:36,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:36,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:36,404 INFO L175 Difference]: Start difference. First operand has 424 places, 598 transitions, 16844 flow. Second operand 8 states and 1391 transitions. [2023-09-01 11:49:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 624 transitions, 18310 flow [2023-09-01 11:49:36,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 624 transitions, 17964 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-09-01 11:49:36,923 INFO L231 Difference]: Finished difference. Result has 427 places, 601 transitions, 17243 flow [2023-09-01 11:49:36,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=16500, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17243, PETRI_PLACES=427, PETRI_TRANSITIONS=601} [2023-09-01 11:49:36,924 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 401 predicate places. [2023-09-01 11:49:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 601 transitions, 17243 flow [2023-09-01 11:49:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:36,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:36,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 11:49:37,129 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,SelfDestructingSolverStorable65 [2023-09-01 11:49:37,130 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:37,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1438672969, now seen corresponding path program 4 times [2023-09-01 11:49:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110280482] [2023-09-01 11:49:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110280482] [2023-09-01 11:49:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110280482] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24895465] [2023-09-01 11:49:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:49:37,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:37,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:37,378 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) [2023-09-01 11:49:37,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 11:49:37,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:49:37,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:49:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:37,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:49:37,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-09-01 11:49:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:39,713 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:49:39,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 49 [2023-09-01 11:49:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:39,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24895465] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:49:39,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:49:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2023-09-01 11:49:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831364386] [2023-09-01 11:49:39,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:49:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:49:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:49:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=272, Unknown=1, NotChecked=0, Total=342 [2023-09-01 11:49:41,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:44,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:46,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:48,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:50,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:52,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:54,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:49:54,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 410 [2023-09-01 11:49:54,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 601 transitions, 17243 flow. Second operand has 19 states, 19 states have (on average 154.26315789473685) internal successors, (2931), 19 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:54,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:54,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 410 [2023-09-01 11:49:54,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:55,882 INFO L130 PetriNetUnfolder]: 2880/5089 cut-off events. [2023-09-01 11:49:55,883 INFO L131 PetriNetUnfolder]: For 129461/129461 co-relation queries the response was YES. [2023-09-01 11:49:55,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47251 conditions, 5089 events. 2880/5089 cut-off events. For 129461/129461 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 30388 event pairs, 639 based on Foata normal form. 8/5097 useless extension candidates. Maximal degree in co-relation 47061. Up to 2915 conditions per place. [2023-09-01 11:49:55,954 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 324 selfloop transitions, 324 changer transitions 0/648 dead transitions. [2023-09-01 11:49:55,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 648 transitions, 19179 flow [2023-09-01 11:49:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:49:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:49:55,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2069 transitions. [2023-09-01 11:49:55,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38818011257035645 [2023-09-01 11:49:55,956 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2069 transitions. [2023-09-01 11:49:55,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2069 transitions. [2023-09-01 11:49:55,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:55,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2069 transitions. [2023-09-01 11:49:55,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 159.15384615384616) internal successors, (2069), 13 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:55,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:55,960 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:55,960 INFO L175 Difference]: Start difference. First operand has 427 places, 601 transitions, 17243 flow. Second operand 13 states and 2069 transitions. [2023-09-01 11:49:55,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 648 transitions, 19179 flow [2023-09-01 11:49:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 648 transitions, 18694 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:49:56,587 INFO L231 Difference]: Finished difference. Result has 436 places, 611 transitions, 17779 flow [2023-09-01 11:49:56,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=16768, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17779, PETRI_PLACES=436, PETRI_TRANSITIONS=611} [2023-09-01 11:49:56,588 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 410 predicate places. [2023-09-01 11:49:56,588 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 611 transitions, 17779 flow [2023-09-01 11:49:56,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 154.26315789473685) internal successors, (2931), 19 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:56,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:56,589 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:56,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 11:49:56,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:56,794 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:56,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:56,794 INFO L85 PathProgramCache]: Analyzing trace with hash -699072181, now seen corresponding path program 5 times [2023-09-01 11:49:56,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:56,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442404909] [2023-09-01 11:49:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:57,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:57,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442404909] [2023-09-01 11:49:57,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442404909] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:49:57,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:49:57,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:49:57,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875651302] [2023-09-01 11:49:57,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:49:57,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:49:57,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:49:57,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:49:57,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:49:57,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 611 transitions, 17779 flow. Second operand has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:57,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:57,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:49:57,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:58,648 INFO L130 PetriNetUnfolder]: 2864/5069 cut-off events. [2023-09-01 11:49:58,648 INFO L131 PetriNetUnfolder]: For 130616/130616 co-relation queries the response was YES. [2023-09-01 11:49:58,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47354 conditions, 5069 events. 2864/5069 cut-off events. For 130616/130616 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 30347 event pairs, 504 based on Foata normal form. 8/5077 useless extension candidates. Maximal degree in co-relation 47162. Up to 2201 conditions per place. [2023-09-01 11:49:58,719 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 281 selfloop transitions, 371 changer transitions 0/652 dead transitions. [2023-09-01 11:49:58,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 652 transitions, 19392 flow [2023-09-01 11:49:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:49:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:49:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2174 transitions. [2023-09-01 11:49:58,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40787992495309566 [2023-09-01 11:49:58,720 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2174 transitions. [2023-09-01 11:49:58,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2174 transitions. [2023-09-01 11:49:58,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:58,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2174 transitions. [2023-09-01 11:49:58,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.23076923076923) internal successors, (2174), 13 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,724 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:58,724 INFO L175 Difference]: Start difference. First operand has 436 places, 611 transitions, 17779 flow. Second operand 13 states and 2174 transitions. [2023-09-01 11:49:58,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 652 transitions, 19392 flow [2023-09-01 11:49:59,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 652 transitions, 18771 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 11:49:59,337 INFO L231 Difference]: Finished difference. Result has 443 places, 613 transitions, 18154 flow [2023-09-01 11:49:59,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=17086, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18154, PETRI_PLACES=443, PETRI_TRANSITIONS=613} [2023-09-01 11:49:59,338 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 417 predicate places. [2023-09-01 11:49:59,338 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 613 transitions, 18154 flow [2023-09-01 11:49:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:59,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:59,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:59,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-09-01 11:49:59,339 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:49:59,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash 333984891, now seen corresponding path program 6 times [2023-09-01 11:49:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:59,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811847799] [2023-09-01 11:49:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:59,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811847799] [2023-09-01 11:49:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811847799] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325701533] [2023-09-01 11:49:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:49:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:59,629 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) [2023-09-01 11:49:59,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 11:49:59,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:49:59,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:49:59,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:59,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 11:49:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:49:59,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:00,058 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:50:00,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:50:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325701533] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:00,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:00,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 16 [2023-09-01 11:50:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122397023] [2023-09-01 11:50:00,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:50:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:50:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:50:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:50:00,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 613 transitions, 18154 flow. Second operand has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:00,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:00,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:50:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:01,888 INFO L130 PetriNetUnfolder]: 2885/5106 cut-off events. [2023-09-01 11:50:01,888 INFO L131 PetriNetUnfolder]: For 137626/137626 co-relation queries the response was YES. [2023-09-01 11:50:01,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48441 conditions, 5106 events. 2885/5106 cut-off events. For 137626/137626 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 30549 event pairs, 626 based on Foata normal form. 10/5116 useless extension candidates. Maximal degree in co-relation 48248. Up to 2927 conditions per place. [2023-09-01 11:50:01,954 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 311 selfloop transitions, 347 changer transitions 0/658 dead transitions. [2023-09-01 11:50:01,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 658 transitions, 20119 flow [2023-09-01 11:50:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:50:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:50:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2165 transitions. [2023-09-01 11:50:01,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40619136960600377 [2023-09-01 11:50:01,955 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2165 transitions. [2023-09-01 11:50:01,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2165 transitions. [2023-09-01 11:50:01,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:01,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2165 transitions. [2023-09-01 11:50:01,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.53846153846155) internal successors, (2165), 13 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:01,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:01,959 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:01,960 INFO L175 Difference]: Start difference. First operand has 443 places, 613 transitions, 18154 flow. Second operand 13 states and 2165 transitions. [2023-09-01 11:50:01,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 658 transitions, 20119 flow [2023-09-01 11:50:02,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 658 transitions, 19460 flow, removed 10 selfloop flow, removed 10 redundant places. [2023-09-01 11:50:02,577 INFO L231 Difference]: Finished difference. Result has 447 places, 621 transitions, 18546 flow [2023-09-01 11:50:02,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=17458, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18546, PETRI_PLACES=447, PETRI_TRANSITIONS=621} [2023-09-01 11:50:02,578 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 421 predicate places. [2023-09-01 11:50:02,578 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 621 transitions, 18546 flow [2023-09-01 11:50:02,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:02,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:02,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:02,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:02,783 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:02,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -61596447, now seen corresponding path program 7 times [2023-09-01 11:50:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433462547] [2023-09-01 11:50:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:03,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:03,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433462547] [2023-09-01 11:50:03,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433462547] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:03,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081898119] [2023-09-01 11:50:03,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:50:03,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:03,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:03,049 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) [2023-09-01 11:50:03,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 11:50:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:50:03,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:03,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 11:50:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:03,422 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:50:03,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:50:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081898119] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:03,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:03,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 16 [2023-09-01 11:50:03,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330101142] [2023-09-01 11:50:03,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:50:03,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:50:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:50:03,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:50:03,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 621 transitions, 18546 flow. Second operand has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:03,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:03,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:50:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:05,262 INFO L130 PetriNetUnfolder]: 2856/5053 cut-off events. [2023-09-01 11:50:05,263 INFO L131 PetriNetUnfolder]: For 135880/135880 co-relation queries the response was YES. [2023-09-01 11:50:05,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48127 conditions, 5053 events. 2856/5053 cut-off events. For 135880/135880 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 30096 event pairs, 593 based on Foata normal form. 10/5063 useless extension candidates. Maximal degree in co-relation 47933. Up to 2927 conditions per place. [2023-09-01 11:50:05,329 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 327 selfloop transitions, 341 changer transitions 0/668 dead transitions. [2023-09-01 11:50:05,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 668 transitions, 20307 flow [2023-09-01 11:50:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:50:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:50:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2336 transitions. [2023-09-01 11:50:05,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069686411149826 [2023-09-01 11:50:05,331 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2336 transitions. [2023-09-01 11:50:05,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2336 transitions. [2023-09-01 11:50:05,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:05,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2336 transitions. [2023-09-01 11:50:05,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.85714285714286) internal successors, (2336), 14 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:05,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:05,335 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 410.0) internal successors, (6150), 15 states have internal predecessors, (6150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:05,335 INFO L175 Difference]: Start difference. First operand has 447 places, 621 transitions, 18546 flow. Second operand 14 states and 2336 transitions. [2023-09-01 11:50:05,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 668 transitions, 20307 flow [2023-09-01 11:50:05,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 668 transitions, 19768 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-09-01 11:50:05,979 INFO L231 Difference]: Finished difference. Result has 456 places, 621 transitions, 18763 flow [2023-09-01 11:50:05,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=17934, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18763, PETRI_PLACES=456, PETRI_TRANSITIONS=621} [2023-09-01 11:50:05,980 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 430 predicate places. [2023-09-01 11:50:05,980 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 621 transitions, 18763 flow [2023-09-01 11:50:05,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:05,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:05,981 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:06,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:06,185 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,SelfDestructingSolverStorable69 [2023-09-01 11:50:06,186 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:06,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 294394613, now seen corresponding path program 8 times [2023-09-01 11:50:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483789604] [2023-09-01 11:50:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:06,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483789604] [2023-09-01 11:50:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483789604] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300632275] [2023-09-01 11:50:06,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:50:06,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:06,466 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) [2023-09-01 11:50:06,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 11:50:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:50:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:50:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:06,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 11:50:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:06,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:06,875 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:50:06,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 49 [2023-09-01 11:50:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300632275] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:06,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:06,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 16 [2023-09-01 11:50:06,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197745014] [2023-09-01 11:50:06,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:06,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:50:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:50:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-09-01 11:50:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:50:07,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 621 transitions, 18763 flow. Second operand has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:07,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:07,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:50:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:08,727 INFO L130 PetriNetUnfolder]: 2846/5033 cut-off events. [2023-09-01 11:50:08,728 INFO L131 PetriNetUnfolder]: For 132951/132951 co-relation queries the response was YES. [2023-09-01 11:50:08,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48249 conditions, 5033 events. 2846/5033 cut-off events. For 132951/132951 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 29810 event pairs, 258 based on Foata normal form. 4/5037 useless extension candidates. Maximal degree in co-relation 48051. Up to 1656 conditions per place. [2023-09-01 11:50:08,801 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 307 selfloop transitions, 357 changer transitions 0/664 dead transitions. [2023-09-01 11:50:08,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 664 transitions, 20365 flow [2023-09-01 11:50:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:50:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:50:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2171 transitions. [2023-09-01 11:50:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2023-09-01 11:50:08,806 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2171 transitions. [2023-09-01 11:50:08,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2171 transitions. [2023-09-01 11:50:08,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:08,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2171 transitions. [2023-09-01 11:50:08,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.0) internal successors, (2171), 13 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:08,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:08,810 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:08,810 INFO L175 Difference]: Start difference. First operand has 456 places, 621 transitions, 18763 flow. Second operand 13 states and 2171 transitions. [2023-09-01 11:50:08,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 664 transitions, 20365 flow [2023-09-01 11:50:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 664 transitions, 19331 flow, removed 13 selfloop flow, removed 13 redundant places. [2023-09-01 11:50:09,562 INFO L231 Difference]: Finished difference. Result has 457 places, 621 transitions, 18455 flow [2023-09-01 11:50:09,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=17695, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18455, PETRI_PLACES=457, PETRI_TRANSITIONS=621} [2023-09-01 11:50:09,563 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 431 predicate places. [2023-09-01 11:50:09,563 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 621 transitions, 18455 flow [2023-09-01 11:50:09,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:09,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:09,563 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:09,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:09,764 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:09,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1174875799, now seen corresponding path program 9 times [2023-09-01 11:50:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878831608] [2023-09-01 11:50:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:50:10,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:10,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878831608] [2023-09-01 11:50:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878831608] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:10,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478028503] [2023-09-01 11:50:10,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:50:10,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:10,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:10,477 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) [2023-09-01 11:50:10,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 11:50:10,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:50:10,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:10,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:50:10,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:10,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 11:50:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:10,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:10,919 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:50:10,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:50:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478028503] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:10,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 7] total 25 [2023-09-01 11:50:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239781370] [2023-09-01 11:50:10,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:50:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:50:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:50:12,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 410 [2023-09-01 11:50:12,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 621 transitions, 18455 flow. Second operand has 25 states, 25 states have (on average 148.2) internal successors, (3705), 25 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:12,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:12,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 410 [2023-09-01 11:50:12,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:13,739 INFO L130 PetriNetUnfolder]: 2858/5053 cut-off events. [2023-09-01 11:50:13,739 INFO L131 PetriNetUnfolder]: For 136263/136263 co-relation queries the response was YES. [2023-09-01 11:50:13,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48375 conditions, 5053 events. 2858/5053 cut-off events. For 136263/136263 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 29984 event pairs, 488 based on Foata normal form. 4/5057 useless extension candidates. Maximal degree in co-relation 48181. Up to 1656 conditions per place. [2023-09-01 11:50:13,802 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 309 selfloop transitions, 366 changer transitions 0/675 dead transitions. [2023-09-01 11:50:13,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 675 transitions, 20458 flow [2023-09-01 11:50:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:50:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:50:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2447 transitions. [2023-09-01 11:50:13,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37301829268292686 [2023-09-01 11:50:13,804 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2447 transitions. [2023-09-01 11:50:13,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2447 transitions. [2023-09-01 11:50:13,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:13,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2447 transitions. [2023-09-01 11:50:13,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 152.9375) internal successors, (2447), 16 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:13,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:13,809 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:13,809 INFO L175 Difference]: Start difference. First operand has 457 places, 621 transitions, 18455 flow. Second operand 16 states and 2447 transitions. [2023-09-01 11:50:13,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 675 transitions, 20458 flow [2023-09-01 11:50:14,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 675 transitions, 20311 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 11:50:14,349 INFO L231 Difference]: Finished difference. Result has 467 places, 628 transitions, 19315 flow [2023-09-01 11:50:14,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=18308, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19315, PETRI_PLACES=467, PETRI_TRANSITIONS=628} [2023-09-01 11:50:14,349 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 441 predicate places. [2023-09-01 11:50:14,349 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 628 transitions, 19315 flow [2023-09-01 11:50:14,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.2) internal successors, (3705), 25 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:14,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:14,350 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:14,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:14,555 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,SelfDestructingSolverStorable71 [2023-09-01 11:50:14,555 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:14,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1955066157, now seen corresponding path program 10 times [2023-09-01 11:50:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:14,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236723177] [2023-09-01 11:50:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:14,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236723177] [2023-09-01 11:50:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236723177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797495299] [2023-09-01 11:50:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:50:14,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:14,836 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) [2023-09-01 11:50:14,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 11:50:15,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:50:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 11:50:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:15,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:15,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-09-01 11:50:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:15,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:15,242 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:50:15,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:50:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797495299] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:15,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:15,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2023-09-01 11:50:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383230768] [2023-09-01 11:50:15,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:15,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:50:15,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:50:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:50:17,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:17,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:50:17,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 628 transitions, 19315 flow. Second operand has 19 states, 19 states have (on average 161.3684210526316) internal successors, (3066), 19 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:17,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:17,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:50:17,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:19,393 INFO L130 PetriNetUnfolder]: 2864/5063 cut-off events. [2023-09-01 11:50:19,393 INFO L131 PetriNetUnfolder]: For 146806/146806 co-relation queries the response was YES. [2023-09-01 11:50:19,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49480 conditions, 5063 events. 2864/5063 cut-off events. For 146806/146806 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 30083 event pairs, 508 based on Foata normal form. 4/5067 useless extension candidates. Maximal degree in co-relation 49282. Up to 1656 conditions per place. [2023-09-01 11:50:19,462 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 295 selfloop transitions, 366 changer transitions 0/661 dead transitions. [2023-09-01 11:50:19,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 661 transitions, 20951 flow [2023-09-01 11:50:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:50:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:50:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1679 transitions. [2023-09-01 11:50:19,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095121951219512 [2023-09-01 11:50:19,464 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1679 transitions. [2023-09-01 11:50:19,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1679 transitions. [2023-09-01 11:50:19,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:19,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1679 transitions. [2023-09-01 11:50:19,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.9) internal successors, (1679), 10 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:19,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:19,467 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:19,467 INFO L175 Difference]: Start difference. First operand has 467 places, 628 transitions, 19315 flow. Second operand 10 states and 1679 transitions. [2023-09-01 11:50:19,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 661 transitions, 20951 flow [2023-09-01 11:50:20,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 661 transitions, 20211 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-09-01 11:50:20,065 INFO L231 Difference]: Finished difference. Result has 466 places, 630 transitions, 19733 flow [2023-09-01 11:50:20,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=18577, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19733, PETRI_PLACES=466, PETRI_TRANSITIONS=630} [2023-09-01 11:50:20,066 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 440 predicate places. [2023-09-01 11:50:20,066 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 630 transitions, 19733 flow [2023-09-01 11:50:20,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 161.3684210526316) internal successors, (3066), 19 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:20,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:20,067 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:20,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:20,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:20,271 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:20,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2135374965, now seen corresponding path program 11 times [2023-09-01 11:50:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:20,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771388314] [2023-09-01 11:50:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771388314] [2023-09-01 11:50:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771388314] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:20,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:50:20,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 11:50:20,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486415585] [2023-09-01 11:50:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:50:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:50:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:50:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 410 [2023-09-01 11:50:20,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 630 transitions, 19733 flow. Second operand has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:20,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:20,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 410 [2023-09-01 11:50:20,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:22,108 INFO L130 PetriNetUnfolder]: 2860/5059 cut-off events. [2023-09-01 11:50:22,109 INFO L131 PetriNetUnfolder]: For 154616/154616 co-relation queries the response was YES. [2023-09-01 11:50:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49898 conditions, 5059 events. 2860/5059 cut-off events. For 154616/154616 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 30056 event pairs, 660 based on Foata normal form. 4/5063 useless extension candidates. Maximal degree in co-relation 49705. Up to 2446 conditions per place. [2023-09-01 11:50:22,180 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 415 selfloop transitions, 238 changer transitions 4/657 dead transitions. [2023-09-01 11:50:22,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 657 transitions, 21220 flow [2023-09-01 11:50:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:50:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:50:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1666 transitions. [2023-09-01 11:50:22,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063414634146341 [2023-09-01 11:50:22,182 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1666 transitions. [2023-09-01 11:50:22,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1666 transitions. [2023-09-01 11:50:22,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:22,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1666 transitions. [2023-09-01 11:50:22,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.6) internal successors, (1666), 10 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:22,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:22,187 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:22,187 INFO L175 Difference]: Start difference. First operand has 466 places, 630 transitions, 19733 flow. Second operand 10 states and 1666 transitions. [2023-09-01 11:50:22,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 657 transitions, 21220 flow [2023-09-01 11:50:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 657 transitions, 20634 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-09-01 11:50:22,851 INFO L231 Difference]: Finished difference. Result has 466 places, 628 transitions, 19587 flow [2023-09-01 11:50:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=19135, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19587, PETRI_PLACES=466, PETRI_TRANSITIONS=628} [2023-09-01 11:50:22,852 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 440 predicate places. [2023-09-01 11:50:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 628 transitions, 19587 flow [2023-09-01 11:50:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.0) internal successors, (1771), 11 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:22,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:22,853 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2023-09-01 11:50:22,853 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:22,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash 721457961, now seen corresponding path program 12 times [2023-09-01 11:50:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379642067] [2023-09-01 11:50:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379642067] [2023-09-01 11:50:23,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379642067] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490469164] [2023-09-01 11:50:23,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:50:23,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:23,097 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) [2023-09-01 11:50:23,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 11:50:23,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:50:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:50:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:23,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:23,508 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:50:23,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 57 [2023-09-01 11:50:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:23,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490469164] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:23,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:50:23,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9] total 17 [2023-09-01 11:50:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428139960] [2023-09-01 11:50:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:50:23,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:50:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:50:23,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 410 [2023-09-01 11:50:23,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 628 transitions, 19587 flow. Second operand has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:23,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:23,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 410 [2023-09-01 11:50:23,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:24,948 INFO L130 PetriNetUnfolder]: 2849/5034 cut-off events. [2023-09-01 11:50:24,949 INFO L131 PetriNetUnfolder]: For 153237/153237 co-relation queries the response was YES. [2023-09-01 11:50:24,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49647 conditions, 5034 events. 2849/5034 cut-off events. For 153237/153237 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 29821 event pairs, 506 based on Foata normal form. 4/5038 useless extension candidates. Maximal degree in co-relation 49454. Up to 1656 conditions per place. [2023-09-01 11:50:25,015 INFO L137 encePairwiseOnDemand]: 402/410 looper letters, 292 selfloop transitions, 359 changer transitions 0/651 dead transitions. [2023-09-01 11:50:25,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 651 transitions, 20966 flow [2023-09-01 11:50:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 11:50:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 11:50:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1402 transitions. [2023-09-01 11:50:25,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274390243902439 [2023-09-01 11:50:25,017 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1402 transitions. [2023-09-01 11:50:25,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1402 transitions. [2023-09-01 11:50:25,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1402 transitions. [2023-09-01 11:50:25,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.25) internal successors, (1402), 8 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:25,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:25,020 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 410.0) internal successors, (3690), 9 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:25,020 INFO L175 Difference]: Start difference. First operand has 466 places, 628 transitions, 19587 flow. Second operand 8 states and 1402 transitions. [2023-09-01 11:50:25,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 651 transitions, 20966 flow [2023-09-01 11:50:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 651 transitions, 20081 flow, removed 8 selfloop flow, removed 23 redundant places. [2023-09-01 11:50:25,648 INFO L231 Difference]: Finished difference. Result has 447 places, 625 transitions, 19339 flow [2023-09-01 11:50:25,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=18621, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19339, PETRI_PLACES=447, PETRI_TRANSITIONS=625} [2023-09-01 11:50:25,648 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 421 predicate places. [2023-09-01 11:50:25,649 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 625 transitions, 19339 flow [2023-09-01 11:50:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 168.14285714285714) internal successors, (1177), 7 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:25,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:25,649 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:25,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:25,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:25,854 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:25,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2023468011, now seen corresponding path program 13 times [2023-09-01 11:50:25,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:25,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442580564] [2023-09-01 11:50:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442580564] [2023-09-01 11:50:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442580564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:26,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:50:26,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:50:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020748733] [2023-09-01 11:50:26,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:50:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:50:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:50:26,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:50:26,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 625 transitions, 19339 flow. Second operand has 12 states, 12 states have (on average 157.83333333333334) internal successors, (1894), 12 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:26,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:26,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:50:26,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:27,854 INFO L130 PetriNetUnfolder]: 2910/5144 cut-off events. [2023-09-01 11:50:27,854 INFO L131 PetriNetUnfolder]: For 150473/150473 co-relation queries the response was YES. [2023-09-01 11:50:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50759 conditions, 5144 events. 2910/5144 cut-off events. For 150473/150473 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 30782 event pairs, 503 based on Foata normal form. 4/5148 useless extension candidates. Maximal degree in co-relation 50580. Up to 2180 conditions per place. [2023-09-01 11:50:27,919 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 337 selfloop transitions, 359 changer transitions 4/700 dead transitions. [2023-09-01 11:50:27,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 700 transitions, 21820 flow [2023-09-01 11:50:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:50:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:50:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1975 transitions. [2023-09-01 11:50:27,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014227642276423 [2023-09-01 11:50:27,921 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1975 transitions. [2023-09-01 11:50:27,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1975 transitions. [2023-09-01 11:50:27,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:27,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1975 transitions. [2023-09-01 11:50:27,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.58333333333334) internal successors, (1975), 12 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:27,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:27,924 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:27,924 INFO L175 Difference]: Start difference. First operand has 447 places, 625 transitions, 19339 flow. Second operand 12 states and 1975 transitions. [2023-09-01 11:50:27,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 700 transitions, 21820 flow [2023-09-01 11:50:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 700 transitions, 21232 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 11:50:28,519 INFO L231 Difference]: Finished difference. Result has 456 places, 640 transitions, 20257 flow [2023-09-01 11:50:28,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=18776, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20257, PETRI_PLACES=456, PETRI_TRANSITIONS=640} [2023-09-01 11:50:28,520 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 430 predicate places. [2023-09-01 11:50:28,520 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 640 transitions, 20257 flow [2023-09-01 11:50:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.83333333333334) internal successors, (1894), 12 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:28,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:28,521 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2023-09-01 11:50:28,521 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:28,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1992329379, now seen corresponding path program 14 times [2023-09-01 11:50:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248390880] [2023-09-01 11:50:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248390880] [2023-09-01 11:50:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248390880] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438318422] [2023-09-01 11:50:29,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:50:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:29,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:29,624 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) [2023-09-01 11:50:29,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 11:50:29,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:50:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:29,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 11:50:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:30,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:30,148 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:50:30,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2023-09-01 11:50:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:30,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438318422] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:30,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:30,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [21] total 30 [2023-09-01 11:50:30,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136974998] [2023-09-01 11:50:30,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:30,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:50:30,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:50:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:50:30,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 410 [2023-09-01 11:50:30,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 640 transitions, 20257 flow. Second operand has 11 states, 11 states have (on average 160.0) internal successors, (1760), 11 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:30,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:30,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 410 [2023-09-01 11:50:30,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:32,287 INFO L130 PetriNetUnfolder]: 2905/5135 cut-off events. [2023-09-01 11:50:32,288 INFO L131 PetriNetUnfolder]: For 150455/150455 co-relation queries the response was YES. [2023-09-01 11:50:32,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50959 conditions, 5135 events. 2905/5135 cut-off events. For 150455/150455 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 30733 event pairs, 489 based on Foata normal form. 4/5139 useless extension candidates. Maximal degree in co-relation 50846. Up to 2464 conditions per place. [2023-09-01 11:50:32,346 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 288 selfloop transitions, 384 changer transitions 4/676 dead transitions. [2023-09-01 11:50:32,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 676 transitions, 21777 flow [2023-09-01 11:50:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:50:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:50:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1665 transitions. [2023-09-01 11:50:32,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060975609756098 [2023-09-01 11:50:32,348 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1665 transitions. [2023-09-01 11:50:32,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1665 transitions. [2023-09-01 11:50:32,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:32,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1665 transitions. [2023-09-01 11:50:32,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.5) internal successors, (1665), 10 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:32,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:32,351 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:32,351 INFO L175 Difference]: Start difference. First operand has 456 places, 640 transitions, 20257 flow. Second operand 10 states and 1665 transitions. [2023-09-01 11:50:32,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 676 transitions, 21777 flow [2023-09-01 11:50:32,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 676 transitions, 21652 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-09-01 11:50:32,902 INFO L231 Difference]: Finished difference. Result has 460 places, 638 transitions, 20834 flow [2023-09-01 11:50:32,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=20098, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20834, PETRI_PLACES=460, PETRI_TRANSITIONS=638} [2023-09-01 11:50:32,903 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 434 predicate places. [2023-09-01 11:50:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 638 transitions, 20834 flow [2023-09-01 11:50:32,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 160.0) internal successors, (1760), 11 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:32,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:32,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:32,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:33,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:33,108 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:33,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -302565915, now seen corresponding path program 15 times [2023-09-01 11:50:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842389720] [2023-09-01 11:50:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:33,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:33,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842389720] [2023-09-01 11:50:33,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842389720] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:33,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:50:33,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:50:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344285333] [2023-09-01 11:50:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:50:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:50:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:50:33,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:50:33,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 638 transitions, 20834 flow. Second operand has 12 states, 12 states have (on average 157.83333333333334) internal successors, (1894), 12 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:33,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:33,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:50:33,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:35,253 INFO L130 PetriNetUnfolder]: 2910/5140 cut-off events. [2023-09-01 11:50:35,253 INFO L131 PetriNetUnfolder]: For 160652/160652 co-relation queries the response was YES. [2023-09-01 11:50:35,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52254 conditions, 5140 events. 2910/5140 cut-off events. For 160652/160652 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 30727 event pairs, 491 based on Foata normal form. 4/5144 useless extension candidates. Maximal degree in co-relation 52141. Up to 2510 conditions per place. [2023-09-01 11:50:35,313 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 298 selfloop transitions, 395 changer transitions 0/693 dead transitions. [2023-09-01 11:50:35,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 693 transitions, 22784 flow [2023-09-01 11:50:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:50:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:50:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1969 transitions. [2023-09-01 11:50:35,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40020325203252033 [2023-09-01 11:50:35,315 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1969 transitions. [2023-09-01 11:50:35,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1969 transitions. [2023-09-01 11:50:35,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:35,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1969 transitions. [2023-09-01 11:50:35,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 164.08333333333334) internal successors, (1969), 12 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:35,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:35,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:35,318 INFO L175 Difference]: Start difference. First operand has 460 places, 638 transitions, 20834 flow. Second operand 12 states and 1969 transitions. [2023-09-01 11:50:35,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 693 transitions, 22784 flow [2023-09-01 11:50:35,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 693 transitions, 21717 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-09-01 11:50:35,902 INFO L231 Difference]: Finished difference. Result has 459 places, 640 transitions, 20684 flow [2023-09-01 11:50:35,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=19780, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20684, PETRI_PLACES=459, PETRI_TRANSITIONS=640} [2023-09-01 11:50:35,903 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 433 predicate places. [2023-09-01 11:50:35,903 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 640 transitions, 20684 flow [2023-09-01 11:50:35,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.83333333333334) internal successors, (1894), 12 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:35,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:35,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2023-09-01 11:50:35,904 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:35,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2122392975, now seen corresponding path program 16 times [2023-09-01 11:50:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320295879] [2023-09-01 11:50:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:50:37,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:37,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320295879] [2023-09-01 11:50:37,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320295879] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:37,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295804399] [2023-09-01 11:50:37,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:50:37,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:37,009 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) [2023-09-01 11:50:37,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 11:50:37,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:50:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:50:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:37,531 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:50:37,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2023-09-01 11:50:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:37,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:50:37,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295804399] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:50:37,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:50:37,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [21] total 30 [2023-09-01 11:50:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465879383] [2023-09-01 11:50:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:37,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 11:50:37,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 11:50:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:50:37,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:50:37,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 640 transitions, 20684 flow. Second operand has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:37,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:37,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:50:37,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:39,443 INFO L130 PetriNetUnfolder]: 3116/5474 cut-off events. [2023-09-01 11:50:39,444 INFO L131 PetriNetUnfolder]: For 167679/167679 co-relation queries the response was YES. [2023-09-01 11:50:39,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 5474 events. 3116/5474 cut-off events. For 167679/167679 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 32946 event pairs, 577 based on Foata normal form. 4/5478 useless extension candidates. Maximal degree in co-relation 54595. Up to 1618 conditions per place. [2023-09-01 11:50:39,513 INFO L137 encePairwiseOnDemand]: 401/410 looper letters, 293 selfloop transitions, 407 changer transitions 0/700 dead transitions. [2023-09-01 11:50:39,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 700 transitions, 22882 flow [2023-09-01 11:50:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:50:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:50:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1801 transitions. [2023-09-01 11:50:39,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993348115299335 [2023-09-01 11:50:39,515 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1801 transitions. [2023-09-01 11:50:39,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1801 transitions. [2023-09-01 11:50:39,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:39,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1801 transitions. [2023-09-01 11:50:39,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.72727272727272) internal successors, (1801), 11 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:39,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:39,613 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:39,613 INFO L175 Difference]: Start difference. First operand has 459 places, 640 transitions, 20684 flow. Second operand 11 states and 1801 transitions. [2023-09-01 11:50:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 700 transitions, 22882 flow [2023-09-01 11:50:40,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 700 transitions, 21888 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-09-01 11:50:40,217 INFO L231 Difference]: Finished difference. Result has 460 places, 653 transitions, 21026 flow [2023-09-01 11:50:40,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=19726, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21026, PETRI_PLACES=460, PETRI_TRANSITIONS=653} [2023-09-01 11:50:40,218 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 434 predicate places. [2023-09-01 11:50:40,218 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 653 transitions, 21026 flow [2023-09-01 11:50:40,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 157.0) internal successors, (1727), 11 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:40,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:40,219 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:40,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:40,421 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,SelfDestructingSolverStorable78 [2023-09-01 11:50:40,421 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:40,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 435157801, now seen corresponding path program 17 times [2023-09-01 11:50:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:40,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567131804] [2023-09-01 11:50:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567131804] [2023-09-01 11:50:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567131804] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124961480] [2023-09-01 11:50:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:50:40,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:40,798 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) [2023-09-01 11:50:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 11:50:41,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:50:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 11:50:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:41,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:50:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:41,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:41,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:41,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 143 [2023-09-01 11:50:41,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:41,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 79 [2023-09-01 11:50:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124961480] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:43,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:50:43,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 10] total 27 [2023-09-01 11:50:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819510657] [2023-09-01 11:50:43,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:50:43,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 11:50:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 11:50:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=639, Unknown=19, NotChecked=0, Total=756 [2023-09-01 11:50:44,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 410 [2023-09-01 11:50:44,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 653 transitions, 21026 flow. Second operand has 10 states, 10 states have (on average 138.2) internal successors, (1382), 10 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:44,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:44,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 410 [2023-09-01 11:50:44,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:50:48,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:50:51,916 INFO L130 PetriNetUnfolder]: 3117/5477 cut-off events. [2023-09-01 11:50:51,916 INFO L131 PetriNetUnfolder]: For 168166/168166 co-relation queries the response was YES. [2023-09-01 11:50:51,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55208 conditions, 5477 events. 3117/5477 cut-off events. For 168166/168166 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 32988 event pairs, 700 based on Foata normal form. 2/5479 useless extension candidates. Maximal degree in co-relation 55092. Up to 3304 conditions per place. [2023-09-01 11:50:51,984 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 305 selfloop transitions, 376 changer transitions 0/681 dead transitions. [2023-09-01 11:50:51,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 681 transitions, 22567 flow [2023-09-01 11:50:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:50:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:50:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1712 transitions. [2023-09-01 11:50:51,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34796747967479674 [2023-09-01 11:50:51,986 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1712 transitions. [2023-09-01 11:50:51,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1712 transitions. [2023-09-01 11:50:51,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:50:51,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1712 transitions. [2023-09-01 11:50:51,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:51,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:51,989 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:51,989 INFO L175 Difference]: Start difference. First operand has 460 places, 653 transitions, 21026 flow. Second operand 12 states and 1712 transitions. [2023-09-01 11:50:51,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 681 transitions, 22567 flow [2023-09-01 11:50:52,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 681 transitions, 21956 flow, removed 84 selfloop flow, removed 11 redundant places. [2023-09-01 11:50:52,656 INFO L231 Difference]: Finished difference. Result has 461 places, 654 transitions, 21231 flow [2023-09-01 11:50:52,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=20415, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21231, PETRI_PLACES=461, PETRI_TRANSITIONS=654} [2023-09-01 11:50:52,656 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 435 predicate places. [2023-09-01 11:50:52,657 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 654 transitions, 21231 flow [2023-09-01 11:50:52,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.2) internal successors, (1382), 10 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:52,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:50:52,657 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:50:52,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 11:50:52,862 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,SelfDestructingSolverStorable79 [2023-09-01 11:50:52,862 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:50:52,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:50:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1693708765, now seen corresponding path program 18 times [2023-09-01 11:50:52,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:50:52,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313592025] [2023-09-01 11:50:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:50:52,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:50:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:50:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:50:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313592025] [2023-09-01 11:50:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313592025] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:50:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196393368] [2023-09-01 11:50:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:50:53,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:50:53,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:50:53,166 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) [2023-09-01 11:50:53,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 11:50:53,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:50:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:50:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 11:50:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:50:53,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:50:53,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:50:53,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:53,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-09-01 11:50:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:53,700 WARN L839 $PredicateComparison]: unable to prove that (forall ((~scoreB~0.base Int) (v_ArrVal_3878 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3878))) (let ((.cse0 (select .cse1 ~scoreB~0.base))) (or (< |c_thread1Thread1of1ForFork0_#t~mem3#1| (+ (select .cse0 (+ c_~scoreB~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) 1)) (< (select .cse0 c_~scoreB~0.offset) (select (select .cse1 c_~scoreA~0.base) c_~scoreA~0.offset)))))) is different from false [2023-09-01 11:50:53,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:53,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 143 [2023-09-01 11:50:53,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:50:53,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 79 [2023-09-01 11:50:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:50:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196393368] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:54,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:54,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 25 [2023-09-01 11:50:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227736102] [2023-09-01 11:50:54,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:50:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:50:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=510, Unknown=1, NotChecked=46, Total=650 [2023-09-01 11:50:54,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 410 [2023-09-01 11:50:54,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 654 transitions, 21231 flow. Second operand has 26 states, 26 states have (on average 135.0) internal successors, (3510), 26 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:54,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:54,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 410 [2023-09-01 11:50:54,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:00,065 INFO L130 PetriNetUnfolder]: 3169/5564 cut-off events. [2023-09-01 11:51:00,065 INFO L131 PetriNetUnfolder]: For 183094/183094 co-relation queries the response was YES. [2023-09-01 11:51:00,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56418 conditions, 5564 events. 3169/5564 cut-off events. For 183094/183094 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 33626 event pairs, 694 based on Foata normal form. 4/5568 useless extension candidates. Maximal degree in co-relation 56306. Up to 3304 conditions per place. [2023-09-01 11:51:00,141 INFO L137 encePairwiseOnDemand]: 395/410 looper letters, 294 selfloop transitions, 435 changer transitions 0/729 dead transitions. [2023-09-01 11:51:00,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 729 transitions, 24743 flow [2023-09-01 11:51:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:51:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:51:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1673 transitions. [2023-09-01 11:51:00,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34004065040650405 [2023-09-01 11:51:00,143 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1673 transitions. [2023-09-01 11:51:00,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1673 transitions. [2023-09-01 11:51:00,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:00,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1673 transitions. [2023-09-01 11:51:00,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 139.41666666666666) internal successors, (1673), 12 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:00,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:00,147 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:00,147 INFO L175 Difference]: Start difference. First operand has 461 places, 654 transitions, 21231 flow. Second operand 12 states and 1673 transitions. [2023-09-01 11:51:00,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 729 transitions, 24743 flow [2023-09-01 11:51:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 729 transitions, 23612 flow, removed 14 selfloop flow, removed 19 redundant places. [2023-09-01 11:51:00,777 INFO L231 Difference]: Finished difference. Result has 453 places, 702 transitions, 22892 flow [2023-09-01 11:51:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=20182, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22892, PETRI_PLACES=453, PETRI_TRANSITIONS=702} [2023-09-01 11:51:00,777 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 427 predicate places. [2023-09-01 11:51:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 702 transitions, 22892 flow [2023-09-01 11:51:00,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 135.0) internal successors, (3510), 26 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:00,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:00,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:00,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:00,983 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:00,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1697579182, now seen corresponding path program 1 times [2023-09-01 11:51:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:00,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678716264] [2023-09-01 11:51:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:01,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678716264] [2023-09-01 11:51:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678716264] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:01,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936930092] [2023-09-01 11:51:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:01,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:01,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:01,404 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) [2023-09-01 11:51:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 11:51:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:51:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:02,563 INFO L321 Elim1Store]: treesize reduction 44, result has 81.0 percent of original size [2023-09-01 11:51:02,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 222 [2023-09-01 11:51:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936930092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:06,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 31 [2023-09-01 11:51:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787244208] [2023-09-01 11:51:06,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:51:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:51:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:51:08,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 410 [2023-09-01 11:51:08,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 702 transitions, 22892 flow. Second operand has 31 states, 31 states have (on average 150.16129032258064) internal successors, (4655), 31 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:08,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:08,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 410 [2023-09-01 11:51:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:12,376 INFO L130 PetriNetUnfolder]: 5860/10410 cut-off events. [2023-09-01 11:51:12,376 INFO L131 PetriNetUnfolder]: For 288577/288577 co-relation queries the response was YES. [2023-09-01 11:51:12,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97040 conditions, 10410 events. 5860/10410 cut-off events. For 288577/288577 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 70440 event pairs, 322 based on Foata normal form. 304/10714 useless extension candidates. Maximal degree in co-relation 96937. Up to 2557 conditions per place. [2023-09-01 11:51:12,501 INFO L137 encePairwiseOnDemand]: 395/410 looper letters, 623 selfloop transitions, 585 changer transitions 6/1214 dead transitions. [2023-09-01 11:51:12,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1214 transitions, 34758 flow [2023-09-01 11:51:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 11:51:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 11:51:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6379 transitions. [2023-09-01 11:51:12,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379476502082094 [2023-09-01 11:51:12,504 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6379 transitions. [2023-09-01 11:51:12,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6379 transitions. [2023-09-01 11:51:12,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:12,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6379 transitions. [2023-09-01 11:51:12,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 155.58536585365854) internal successors, (6379), 41 states have internal predecessors, (6379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:12,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 410.0) internal successors, (17220), 42 states have internal predecessors, (17220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:12,515 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 410.0) internal successors, (17220), 42 states have internal predecessors, (17220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:12,516 INFO L175 Difference]: Start difference. First operand has 453 places, 702 transitions, 22892 flow. Second operand 41 states and 6379 transitions. [2023-09-01 11:51:12,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1214 transitions, 34758 flow [2023-09-01 11:51:13,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1214 transitions, 33340 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-09-01 11:51:13,659 INFO L231 Difference]: Finished difference. Result has 503 places, 866 transitions, 27668 flow [2023-09-01 11:51:13,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=21616, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=27668, PETRI_PLACES=503, PETRI_TRANSITIONS=866} [2023-09-01 11:51:13,659 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 477 predicate places. [2023-09-01 11:51:13,660 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 866 transitions, 27668 flow [2023-09-01 11:51:13,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 150.16129032258064) internal successors, (4655), 31 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:13,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:13,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:13,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:13,865 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,SelfDestructingSolverStorable81 [2023-09-01 11:51:13,866 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:13,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash -646389568, now seen corresponding path program 2 times [2023-09-01 11:51:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:13,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690710982] [2023-09-01 11:51:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690710982] [2023-09-01 11:51:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690710982] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434546537] [2023-09-01 11:51:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:51:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:14,315 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) [2023-09-01 11:51:14,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 11:51:14,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:51:14,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 11:51:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:14,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:15,148 INFO L321 Elim1Store]: treesize reduction 44, result has 81.0 percent of original size [2023-09-01 11:51:15,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 222 [2023-09-01 11:51:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:17,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434546537] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:17,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:17,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2023-09-01 11:51:17,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904350286] [2023-09-01 11:51:17,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:17,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:51:17,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:51:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:51:18,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:51:18,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 866 transitions, 27668 flow. Second operand has 22 states, 22 states have (on average 158.13636363636363) internal successors, (3479), 22 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:18,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:18,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:51:18,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:24,541 INFO L130 PetriNetUnfolder]: 7368/13503 cut-off events. [2023-09-01 11:51:24,542 INFO L131 PetriNetUnfolder]: For 411258/411258 co-relation queries the response was YES. [2023-09-01 11:51:24,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127459 conditions, 13503 events. 7368/13503 cut-off events. For 411258/411258 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 100690 event pairs, 1763 based on Foata normal form. 230/13733 useless extension candidates. Maximal degree in co-relation 127335. Up to 4835 conditions per place. [2023-09-01 11:51:24,790 INFO L137 encePairwiseOnDemand]: 396/410 looper letters, 685 selfloop transitions, 604 changer transitions 0/1289 dead transitions. [2023-09-01 11:51:24,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1289 transitions, 38659 flow [2023-09-01 11:51:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 11:51:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 11:51:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4462 transitions. [2023-09-01 11:51:24,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030713640469738 [2023-09-01 11:51:24,795 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4462 transitions. [2023-09-01 11:51:24,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4462 transitions. [2023-09-01 11:51:24,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:24,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4462 transitions. [2023-09-01 11:51:24,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 165.25925925925927) internal successors, (4462), 27 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:24,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 410.0) internal successors, (11480), 28 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:24,803 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 410.0) internal successors, (11480), 28 states have internal predecessors, (11480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:24,804 INFO L175 Difference]: Start difference. First operand has 503 places, 866 transitions, 27668 flow. Second operand 27 states and 4462 transitions. [2023-09-01 11:51:24,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1289 transitions, 38659 flow [2023-09-01 11:51:27,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1289 transitions, 37143 flow, removed 300 selfloop flow, removed 23 redundant places. [2023-09-01 11:51:27,196 INFO L231 Difference]: Finished difference. Result has 519 places, 1084 transitions, 34731 flow [2023-09-01 11:51:27,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=26236, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=34731, PETRI_PLACES=519, PETRI_TRANSITIONS=1084} [2023-09-01 11:51:27,197 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 493 predicate places. [2023-09-01 11:51:27,197 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1084 transitions, 34731 flow [2023-09-01 11:51:27,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 158.13636363636363) internal successors, (3479), 22 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:27,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:27,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:27,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-09-01 11:51:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:27,403 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:27,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1623553708, now seen corresponding path program 3 times [2023-09-01 11:51:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:27,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436459039] [2023-09-01 11:51:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:51:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436459039] [2023-09-01 11:51:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436459039] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680111201] [2023-09-01 11:51:28,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:51:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:28,171 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) [2023-09-01 11:51:28,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 11:51:28,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:51:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:51:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:28,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:51:28,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680111201] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:28,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:51:28,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2023-09-01 11:51:28,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920541344] [2023-09-01 11:51:28,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:51:28,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:51:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:51:29,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 410 [2023-09-01 11:51:29,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1084 transitions, 34731 flow. Second operand has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:29,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:29,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 410 [2023-09-01 11:51:29,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:34,783 INFO L130 PetriNetUnfolder]: 7340/13395 cut-off events. [2023-09-01 11:51:34,784 INFO L131 PetriNetUnfolder]: For 453830/453830 co-relation queries the response was YES. [2023-09-01 11:51:34,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132351 conditions, 13395 events. 7340/13395 cut-off events. For 453830/453830 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 99201 event pairs, 1364 based on Foata normal form. 2/13397 useless extension candidates. Maximal degree in co-relation 132216. Up to 6555 conditions per place. [2023-09-01 11:51:35,047 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 854 selfloop transitions, 263 changer transitions 2/1119 dead transitions. [2023-09-01 11:51:35,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1119 transitions, 37203 flow [2023-09-01 11:51:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:51:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:51:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1948 transitions. [2023-09-01 11:51:35,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959349593495935 [2023-09-01 11:51:35,050 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1948 transitions. [2023-09-01 11:51:35,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1948 transitions. [2023-09-01 11:51:35,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:35,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1948 transitions. [2023-09-01 11:51:35,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.33333333333334) internal successors, (1948), 12 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,054 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,054 INFO L175 Difference]: Start difference. First operand has 519 places, 1084 transitions, 34731 flow. Second operand 12 states and 1948 transitions. [2023-09-01 11:51:35,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1119 transitions, 37203 flow [2023-09-01 11:51:37,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1119 transitions, 36345 flow, removed 327 selfloop flow, removed 7 redundant places. [2023-09-01 11:51:37,808 INFO L231 Difference]: Finished difference. Result has 521 places, 1074 transitions, 34085 flow [2023-09-01 11:51:37,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=33587, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=34085, PETRI_PLACES=521, PETRI_TRANSITIONS=1074} [2023-09-01 11:51:37,809 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 495 predicate places. [2023-09-01 11:51:37,809 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1074 transitions, 34085 flow [2023-09-01 11:51:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:37,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:37,810 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:37,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-09-01 11:51:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:38,016 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:38,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1737934884, now seen corresponding path program 4 times [2023-09-01 11:51:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:38,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378603008] [2023-09-01 11:51:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378603008] [2023-09-01 11:51:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378603008] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037977210] [2023-09-01 11:51:38,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:51:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:38,503 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) [2023-09-01 11:51:38,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 11:51:38,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:51:38,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 11:51:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:38,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:39,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:39,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 294 [2023-09-01 11:53:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037977210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:52,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-09-01 11:53:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310550503] [2023-09-01 11:53:52,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:53:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:53:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:53:54,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 410 [2023-09-01 11:53:54,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1074 transitions, 34085 flow. Second operand has 27 states, 27 states have (on average 150.25925925925927) internal successors, (4057), 27 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:54,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:54,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 410 [2023-09-01 11:53:54,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:04,966 INFO L130 PetriNetUnfolder]: 8628/16066 cut-off events. [2023-09-01 11:54:04,967 INFO L131 PetriNetUnfolder]: For 501368/501368 co-relation queries the response was YES. [2023-09-01 11:54:05,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152623 conditions, 16066 events. 8628/16066 cut-off events. For 501368/501368 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 126301 event pairs, 1127 based on Foata normal form. 61/16127 useless extension candidates. Maximal degree in co-relation 152489. Up to 5442 conditions per place. [2023-09-01 11:54:05,304 INFO L137 encePairwiseOnDemand]: 394/410 looper letters, 694 selfloop transitions, 788 changer transitions 5/1487 dead transitions. [2023-09-01 11:54:05,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1487 transitions, 44135 flow [2023-09-01 11:54:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-09-01 11:54:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-09-01 11:54:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8795 transitions. [2023-09-01 11:54:05,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37633718442447583 [2023-09-01 11:54:05,309 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8795 transitions. [2023-09-01 11:54:05,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8795 transitions. [2023-09-01 11:54:05,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:05,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8795 transitions. [2023-09-01 11:54:05,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 154.2982456140351) internal successors, (8795), 57 states have internal predecessors, (8795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:05,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 410.0) internal successors, (23780), 58 states have internal predecessors, (23780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:05,327 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 410.0) internal successors, (23780), 58 states have internal predecessors, (23780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:05,327 INFO L175 Difference]: Start difference. First operand has 521 places, 1074 transitions, 34085 flow. Second operand 57 states and 8795 transitions. [2023-09-01 11:54:05,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1487 transitions, 44135 flow [2023-09-01 11:54:08,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1487 transitions, 43466 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-09-01 11:54:08,660 INFO L231 Difference]: Finished difference. Result has 583 places, 1236 transitions, 40518 flow [2023-09-01 11:54:08,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=33558, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=40518, PETRI_PLACES=583, PETRI_TRANSITIONS=1236} [2023-09-01 11:54:08,661 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 557 predicate places. [2023-09-01 11:54:08,661 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1236 transitions, 40518 flow [2023-09-01 11:54:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 150.25925925925927) internal successors, (4057), 27 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:08,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:08,662 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:08,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:08,868 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:08,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2048500918, now seen corresponding path program 5 times [2023-09-01 11:54:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024801448] [2023-09-01 11:54:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:54:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024801448] [2023-09-01 11:54:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024801448] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466775934] [2023-09-01 11:54:09,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:54:09,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:09,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:09,555 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) [2023-09-01 11:54:09,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 11:54:09,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:54:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:54:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:10,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:54:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466775934] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:54:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:54:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2023-09-01 11:54:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205863915] [2023-09-01 11:54:10,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:10,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:54:10,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:54:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:54:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 410 [2023-09-01 11:54:10,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1236 transitions, 40518 flow. Second operand has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:10,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:10,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 410 [2023-09-01 11:54:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:17,676 INFO L130 PetriNetUnfolder]: 8611/16026 cut-off events. [2023-09-01 11:54:17,677 INFO L131 PetriNetUnfolder]: For 558972/558972 co-relation queries the response was YES. [2023-09-01 11:54:17,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159454 conditions, 16026 events. 8611/16026 cut-off events. For 558972/558972 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 125773 event pairs, 1739 based on Foata normal form. 2/16028 useless extension candidates. Maximal degree in co-relation 159303. Up to 8076 conditions per place. [2023-09-01 11:54:18,062 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 998 selfloop transitions, 269 changer transitions 2/1269 dead transitions. [2023-09-01 11:54:18,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1269 transitions, 43296 flow [2023-09-01 11:54:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:54:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:54:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1905 transitions. [2023-09-01 11:54:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2023-09-01 11:54:18,064 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1905 transitions. [2023-09-01 11:54:18,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1905 transitions. [2023-09-01 11:54:18,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:18,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1905 transitions. [2023-09-01 11:54:18,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 158.75) internal successors, (1905), 12 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,068 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,068 INFO L175 Difference]: Start difference. First operand has 583 places, 1236 transitions, 40518 flow. Second operand 12 states and 1905 transitions. [2023-09-01 11:54:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1269 transitions, 43296 flow [2023-09-01 11:54:22,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1269 transitions, 42327 flow, removed 200 selfloop flow, removed 25 redundant places. [2023-09-01 11:54:22,788 INFO L231 Difference]: Finished difference. Result has 568 places, 1232 transitions, 39897 flow [2023-09-01 11:54:22,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=39390, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=39897, PETRI_PLACES=568, PETRI_TRANSITIONS=1232} [2023-09-01 11:54:22,789 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 542 predicate places. [2023-09-01 11:54:22,789 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1232 transitions, 39897 flow [2023-09-01 11:54:22,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.0) internal successors, (1836), 12 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:22,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:22,790 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:22,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:22,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:22,994 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:22,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 108172946, now seen corresponding path program 6 times [2023-09-01 11:54:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205195534] [2023-09-01 11:54:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:24,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:24,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205195534] [2023-09-01 11:54:24,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205195534] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:24,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330166093] [2023-09-01 11:54:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:54:24,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:24,236 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) [2023-09-01 11:54:24,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 11:54:24,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:54:24,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:54:24,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:24,946 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:24,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:54:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:24,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:54:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330166093] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:54:24,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:54:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [22] total 32 [2023-09-01 11:54:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122643915] [2023-09-01 11:54:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:54:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:54:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:54:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 11:54:25,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:54:25,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1232 transitions, 39897 flow. Second operand has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:25,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:25,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:54:25,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:32,415 INFO L130 PetriNetUnfolder]: 8582/15915 cut-off events. [2023-09-01 11:54:32,416 INFO L131 PetriNetUnfolder]: For 566846/566846 co-relation queries the response was YES. [2023-09-01 11:54:32,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158457 conditions, 15915 events. 8582/15915 cut-off events. For 566846/566846 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 124342 event pairs, 1745 based on Foata normal form. 2/15917 useless extension candidates. Maximal degree in co-relation 158307. Up to 8088 conditions per place. [2023-09-01 11:54:32,649 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 991 selfloop transitions, 263 changer transitions 4/1258 dead transitions. [2023-09-01 11:54:32,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1258 transitions, 42563 flow [2023-09-01 11:54:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:54:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:54:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1789 transitions. [2023-09-01 11:54:32,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966740576496674 [2023-09-01 11:54:32,760 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1789 transitions. [2023-09-01 11:54:32,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1789 transitions. [2023-09-01 11:54:32,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:32,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1789 transitions. [2023-09-01 11:54:32,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.63636363636363) internal successors, (1789), 11 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:32,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:32,763 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:32,763 INFO L175 Difference]: Start difference. First operand has 568 places, 1232 transitions, 39897 flow. Second operand 11 states and 1789 transitions. [2023-09-01 11:54:32,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1258 transitions, 42563 flow [2023-09-01 11:54:37,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1258 transitions, 42020 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-09-01 11:54:37,281 INFO L231 Difference]: Finished difference. Result has 563 places, 1224 transitions, 39610 flow [2023-09-01 11:54:37,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=39143, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=39610, PETRI_PLACES=563, PETRI_TRANSITIONS=1224} [2023-09-01 11:54:37,282 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 537 predicate places. [2023-09-01 11:54:37,282 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1224 transitions, 39610 flow [2023-09-01 11:54:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:37,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:37,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:37,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:37,488 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,SelfDestructingSolverStorable86 [2023-09-01 11:54:37,488 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:37,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1314119378, now seen corresponding path program 7 times [2023-09-01 11:54:37,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:37,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558949492] [2023-09-01 11:54:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:37,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:54:38,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558949492] [2023-09-01 11:54:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558949492] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307786075] [2023-09-01 11:54:38,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:54:38,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:38,542 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) [2023-09-01 11:54:38,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 11:54:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:54:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:39,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:39,827 INFO L321 Elim1Store]: treesize reduction 44, result has 81.0 percent of original size [2023-09-01 11:54:39,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 222 [2023-09-01 11:54:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:45,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307786075] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:45,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:45,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 9] total 40 [2023-09-01 11:54:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995371147] [2023-09-01 11:54:45,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:45,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 11:54:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 11:54:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2023-09-01 11:54:49,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 410 [2023-09-01 11:54:49,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1224 transitions, 39610 flow. Second operand has 40 states, 40 states have (on average 136.7) internal successors, (5468), 40 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:49,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:49,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 410 [2023-09-01 11:54:49,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:06,357 INFO L130 PetriNetUnfolder]: 17535/32591 cut-off events. [2023-09-01 11:55:06,358 INFO L131 PetriNetUnfolder]: For 1150295/1150295 co-relation queries the response was YES. [2023-09-01 11:55:07,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322013 conditions, 32591 events. 17535/32591 cut-off events. For 1150295/1150295 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 285864 event pairs, 2400 based on Foata normal form. 132/32723 useless extension candidates. Maximal degree in co-relation 321866. Up to 7529 conditions per place. [2023-09-01 11:55:07,201 INFO L137 encePairwiseOnDemand]: 392/410 looper letters, 1343 selfloop transitions, 1432 changer transitions 0/2775 dead transitions. [2023-09-01 11:55:07,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 2775 transitions, 88894 flow [2023-09-01 11:55:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-09-01 11:55:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-09-01 11:55:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 8946 transitions. [2023-09-01 11:55:07,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2023-09-01 11:55:07,208 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 8946 transitions. [2023-09-01 11:55:07,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 8946 transitions. [2023-09-01 11:55:07,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:07,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 8946 transitions. [2023-09-01 11:55:07,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:07,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 410.0) internal successors, (26240), 64 states have internal predecessors, (26240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:07,228 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 410.0) internal successors, (26240), 64 states have internal predecessors, (26240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:07,228 INFO L175 Difference]: Start difference. First operand has 563 places, 1224 transitions, 39610 flow. Second operand 63 states and 8946 transitions. [2023-09-01 11:55:07,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 2775 transitions, 88894 flow [2023-09-01 11:55:22,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 2775 transitions, 87210 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-09-01 11:55:22,489 INFO L231 Difference]: Finished difference. Result has 615 places, 1964 transitions, 66485 flow [2023-09-01 11:55:22,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=38452, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=66485, PETRI_PLACES=615, PETRI_TRANSITIONS=1964} [2023-09-01 11:55:22,490 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 589 predicate places. [2023-09-01 11:55:22,490 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 1964 transitions, 66485 flow [2023-09-01 11:55:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 136.7) internal successors, (5468), 40 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:22,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:22,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:22,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-09-01 11:55:22,696 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,SelfDestructingSolverStorable87 [2023-09-01 11:55:22,697 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:22,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -16981364, now seen corresponding path program 8 times [2023-09-01 11:55:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460634197] [2023-09-01 11:55:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:55:23,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:23,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460634197] [2023-09-01 11:55:23,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460634197] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:23,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822863560] [2023-09-01 11:55:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:55:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:23,470 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) [2023-09-01 11:55:23,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 11:55:23,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:55:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:55:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:24,069 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:55:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:24,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:24,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822863560] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:24,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:24,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2023-09-01 11:55:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136865621] [2023-09-01 11:55:24,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:24,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-09-01 11:55:24,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 11:55:24,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 1964 transitions, 66485 flow. Second operand has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:24,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 11:55:24,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:41,790 INFO L130 PetriNetUnfolder]: 17519/32559 cut-off events. [2023-09-01 11:55:41,790 INFO L131 PetriNetUnfolder]: For 1166746/1166746 co-relation queries the response was YES. [2023-09-01 11:55:42,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327979 conditions, 32559 events. 17519/32559 cut-off events. For 1166746/1166746 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 285808 event pairs, 3620 based on Foata normal form. 4/32563 useless extension candidates. Maximal degree in co-relation 327830. Up to 16667 conditions per place. [2023-09-01 11:55:42,415 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 1435 selfloop transitions, 549 changer transitions 8/1992 dead transitions. [2023-09-01 11:55:42,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1992 transitions, 70615 flow [2023-09-01 11:55:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:55:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:55:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1946 transitions. [2023-09-01 11:55:42,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3955284552845528 [2023-09-01 11:55:42,417 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1946 transitions. [2023-09-01 11:55:42,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1946 transitions. [2023-09-01 11:55:42,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:42,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1946 transitions. [2023-09-01 11:55:42,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.16666666666666) internal successors, (1946), 12 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:42,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:42,421 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:42,421 INFO L175 Difference]: Start difference. First operand has 615 places, 1964 transitions, 66485 flow. Second operand 12 states and 1946 transitions. [2023-09-01 11:55:42,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1992 transitions, 70615 flow [2023-09-01 11:55:57,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1992 transitions, 69961 flow, removed 54 selfloop flow, removed 20 redundant places. [2023-09-01 11:55:57,528 INFO L231 Difference]: Finished difference. Result has 605 places, 1954 transitions, 66537 flow [2023-09-01 11:55:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=65633, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=66537, PETRI_PLACES=605, PETRI_TRANSITIONS=1954} [2023-09-01 11:55:57,529 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 579 predicate places. [2023-09-01 11:55:57,529 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1954 transitions, 66537 flow [2023-09-01 11:55:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:57,530 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:57,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-09-01 11:55:57,735 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,SelfDestructingSolverStorable88 [2023-09-01 11:55:57,735 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:57,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2121312068, now seen corresponding path program 9 times [2023-09-01 11:55:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905172854] [2023-09-01 11:55:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:55:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905172854] [2023-09-01 11:55:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905172854] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211663964] [2023-09-01 11:55:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:55:58,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:58,919 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) [2023-09-01 11:55:58,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 11:55:59,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:55:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:55:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:59,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:55:59,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211663964] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:55:59,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:55:59,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [22] total 32 [2023-09-01 11:55:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796599578] [2023-09-01 11:55:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:55:59,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:55:59,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:55:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 11:55:59,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:55:59,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1954 transitions, 66537 flow. Second operand has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:59,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:59,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:55:59,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:17,857 INFO L130 PetriNetUnfolder]: 17457/32329 cut-off events. [2023-09-01 11:56:17,857 INFO L131 PetriNetUnfolder]: For 1207858/1207858 co-relation queries the response was YES. [2023-09-01 11:56:18,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330187 conditions, 32329 events. 17457/32329 cut-off events. For 1207858/1207858 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 281748 event pairs, 3604 based on Foata normal form. 4/32333 useless extension candidates. Maximal degree in co-relation 330041. Up to 16643 conditions per place. [2023-09-01 11:56:18,466 INFO L137 encePairwiseOnDemand]: 398/410 looper letters, 1422 selfloop transitions, 554 changer transitions 3/1979 dead transitions. [2023-09-01 11:56:18,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1979 transitions, 70498 flow [2023-09-01 11:56:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:56:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:56:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2082 transitions. [2023-09-01 11:56:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39061913696060035 [2023-09-01 11:56:18,468 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2082 transitions. [2023-09-01 11:56:18,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2082 transitions. [2023-09-01 11:56:18,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:18,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2082 transitions. [2023-09-01 11:56:18,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 160.15384615384616) internal successors, (2082), 13 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 410.0) internal successors, (5740), 14 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:18,472 INFO L175 Difference]: Start difference. First operand has 605 places, 1954 transitions, 66537 flow. Second operand 13 states and 2082 transitions. [2023-09-01 11:56:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1979 transitions, 70498 flow [2023-09-01 11:56:33,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1979 transitions, 69176 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-09-01 11:56:33,793 INFO L231 Difference]: Finished difference. Result has 599 places, 1941 transitions, 65886 flow [2023-09-01 11:56:33,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=64836, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=65886, PETRI_PLACES=599, PETRI_TRANSITIONS=1941} [2023-09-01 11:56:33,794 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 573 predicate places. [2023-09-01 11:56:33,794 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1941 transitions, 65886 flow [2023-09-01 11:56:33,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:33,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:33,795 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:33,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:33,999 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,SelfDestructingSolverStorable89 [2023-09-01 11:56:33,999 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:33,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1936906094, now seen corresponding path program 10 times [2023-09-01 11:56:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:34,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449419806] [2023-09-01 11:56:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:34,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:34,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449419806] [2023-09-01 11:56:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449419806] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:56:34,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:56:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:56:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096240032] [2023-09-01 11:56:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:56:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:56:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:56:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:56:34,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:56:34,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1941 transitions, 65886 flow. Second operand has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:34,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:34,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:56:34,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:52,360 INFO L130 PetriNetUnfolder]: 17457/32339 cut-off events. [2023-09-01 11:56:52,361 INFO L131 PetriNetUnfolder]: For 1196342/1196342 co-relation queries the response was YES. [2023-09-01 11:56:52,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329447 conditions, 32339 events. 17457/32339 cut-off events. For 1196342/1196342 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 282051 event pairs, 7744 based on Foata normal form. 4/32343 useless extension candidates. Maximal degree in co-relation 329301. Up to 30373 conditions per place. [2023-09-01 11:56:52,943 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 1634 selfloop transitions, 318 changer transitions 12/1964 dead transitions. [2023-09-01 11:56:52,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1964 transitions, 70133 flow [2023-09-01 11:56:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:56:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:56:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1621 transitions. [2023-09-01 11:56:52,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953658536585366 [2023-09-01 11:56:52,945 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1621 transitions. [2023-09-01 11:56:52,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1621 transitions. [2023-09-01 11:56:52,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:52,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1621 transitions. [2023-09-01 11:56:52,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.1) internal successors, (1621), 10 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:52,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:52,948 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:52,948 INFO L175 Difference]: Start difference. First operand has 599 places, 1941 transitions, 65886 flow. Second operand 10 states and 1621 transitions. [2023-09-01 11:56:52,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1964 transitions, 70133 flow [2023-09-01 11:57:07,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1964 transitions, 69034 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-09-01 11:57:07,215 INFO L231 Difference]: Finished difference. Result has 595 places, 1937 transitions, 65343 flow [2023-09-01 11:57:07,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=64787, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=65343, PETRI_PLACES=595, PETRI_TRANSITIONS=1937} [2023-09-01 11:57:07,216 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 569 predicate places. [2023-09-01 11:57:07,216 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 1937 transitions, 65343 flow [2023-09-01 11:57:07,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:07,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:07,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2023-09-01 11:57:07,217 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:07,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2101774316, now seen corresponding path program 11 times [2023-09-01 11:57:07,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:07,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554246212] [2023-09-01 11:57:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 11:57:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554246212] [2023-09-01 11:57:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554246212] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009106708] [2023-09-01 11:57:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:57:08,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:08,066 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) [2023-09-01 11:57:08,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 11:57:08,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:57:08,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:57:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:08,724 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:57:08,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:57:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:08,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:57:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009106708] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:57:08,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:57:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19] total 29 [2023-09-01 11:57:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371442541] [2023-09-01 11:57:08,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:57:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:57:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:57:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:57:09,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 410 [2023-09-01 11:57:09,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1937 transitions, 65343 flow. Second operand has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:09,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:09,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 410 [2023-09-01 11:57:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:26,890 INFO L130 PetriNetUnfolder]: 17445/32309 cut-off events. [2023-09-01 11:57:26,891 INFO L131 PetriNetUnfolder]: For 1152870/1152870 co-relation queries the response was YES. [2023-09-01 11:57:27,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324702 conditions, 32309 events. 17445/32309 cut-off events. For 1152870/1152870 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 281748 event pairs, 3616 based on Foata normal form. 4/32313 useless extension candidates. Maximal degree in co-relation 324555. Up to 16667 conditions per place. [2023-09-01 11:57:27,506 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 1436 selfloop transitions, 520 changer transitions 8/1964 dead transitions. [2023-09-01 11:57:27,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 1964 transitions, 69447 flow [2023-09-01 11:57:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:57:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:57:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1761 transitions. [2023-09-01 11:57:27,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39046563192904654 [2023-09-01 11:57:27,508 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1761 transitions. [2023-09-01 11:57:27,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1761 transitions. [2023-09-01 11:57:27,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:27,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1761 transitions. [2023-09-01 11:57:27,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.0909090909091) internal successors, (1761), 11 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:27,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:27,511 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:27,511 INFO L175 Difference]: Start difference. First operand has 595 places, 1937 transitions, 65343 flow. Second operand 11 states and 1761 transitions. [2023-09-01 11:57:27,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 1964 transitions, 69447 flow [2023-09-01 11:57:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1964 transitions, 68804 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 11:57:41,933 INFO L231 Difference]: Finished difference. Result has 596 places, 1931 transitions, 65505 flow [2023-09-01 11:57:41,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=64590, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=65505, PETRI_PLACES=596, PETRI_TRANSITIONS=1931} [2023-09-01 11:57:41,934 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 570 predicate places. [2023-09-01 11:57:41,934 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1931 transitions, 65505 flow [2023-09-01 11:57:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:41,935 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:41,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:42,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:42,139 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:42,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1636900852, now seen corresponding path program 12 times [2023-09-01 11:57:42,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:42,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953023429] [2023-09-01 11:57:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:42,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:42,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953023429] [2023-09-01 11:57:42,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953023429] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:57:42,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:57:42,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:57:42,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849972862] [2023-09-01 11:57:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:57:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:57:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:57:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:57:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:57:42,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1931 transitions, 65505 flow. Second operand has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:42,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:42,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:57:42,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:59,944 INFO L130 PetriNetUnfolder]: 17435/32291 cut-off events. [2023-09-01 11:57:59,944 INFO L131 PetriNetUnfolder]: For 1191783/1191783 co-relation queries the response was YES. [2023-09-01 11:58:00,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328753 conditions, 32291 events. 17435/32291 cut-off events. For 1191783/1191783 co-relation queries the response was YES. Maximal size of possible extension queue 967. Compared 281595 event pairs, 7716 based on Foata normal form. 4/32295 useless extension candidates. Maximal degree in co-relation 328605. Up to 30365 conditions per place. [2023-09-01 11:58:00,567 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 1631 selfloop transitions, 307 changer transitions 10/1948 dead transitions. [2023-09-01 11:58:00,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1948 transitions, 69458 flow [2023-09-01 11:58:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:58:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:58:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1939 transitions. [2023-09-01 11:58:00,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39410569105691057 [2023-09-01 11:58:00,569 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1939 transitions. [2023-09-01 11:58:00,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1939 transitions. [2023-09-01 11:58:00,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:00,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1939 transitions. [2023-09-01 11:58:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.58333333333334) internal successors, (1939), 12 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:00,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:00,572 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 410.0) internal successors, (5330), 13 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:00,572 INFO L175 Difference]: Start difference. First operand has 596 places, 1931 transitions, 65505 flow. Second operand 12 states and 1939 transitions. [2023-09-01 11:58:00,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1948 transitions, 69458 flow [2023-09-01 11:58:15,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1948 transitions, 68349 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-09-01 11:58:15,607 INFO L231 Difference]: Finished difference. Result has 596 places, 1922 transitions, 64703 flow [2023-09-01 11:58:15,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=64290, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=64703, PETRI_PLACES=596, PETRI_TRANSITIONS=1922} [2023-09-01 11:58:15,608 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 570 predicate places. [2023-09-01 11:58:15,608 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1922 transitions, 64703 flow [2023-09-01 11:58:15,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:15,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:15,609 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2023-09-01 11:58:15,609 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:15,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash -239187364, now seen corresponding path program 13 times [2023-09-01 11:58:15,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363188262] [2023-09-01 11:58:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363188262] [2023-09-01 11:58:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363188262] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:58:15,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:58:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 11:58:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482335644] [2023-09-01 11:58:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:58:15,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 11:58:15,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 11:58:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 11:58:16,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 11:58:16,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1922 transitions, 64703 flow. Second operand has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:16,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:16,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 11:58:16,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:33,109 INFO L130 PetriNetUnfolder]: 17425/32267 cut-off events. [2023-09-01 11:58:33,110 INFO L131 PetriNetUnfolder]: For 1146789/1146789 co-relation queries the response was YES. [2023-09-01 11:58:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324031 conditions, 32267 events. 17425/32267 cut-off events. For 1146789/1146789 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 281357 event pairs, 7738 based on Foata normal form. 4/32271 useless extension candidates. Maximal degree in co-relation 323883. Up to 30361 conditions per place. [2023-09-01 11:58:33,842 INFO L137 encePairwiseOnDemand]: 399/410 looper letters, 1629 selfloop transitions, 304 changer transitions 3/1936 dead transitions. [2023-09-01 11:58:33,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1936 transitions, 68611 flow [2023-09-01 11:58:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:58:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:58:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1622 transitions. [2023-09-01 11:58:33,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395609756097561 [2023-09-01 11:58:33,844 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1622 transitions. [2023-09-01 11:58:33,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1622 transitions. [2023-09-01 11:58:33,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:33,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1622 transitions. [2023-09-01 11:58:33,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.2) internal successors, (1622), 10 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:33,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:33,847 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 410.0) internal successors, (4510), 11 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:33,847 INFO L175 Difference]: Start difference. First operand has 596 places, 1922 transitions, 64703 flow. Second operand 10 states and 1622 transitions. [2023-09-01 11:58:33,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1936 transitions, 68611 flow [2023-09-01 11:58:48,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1936 transitions, 67953 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 11:58:48,072 INFO L231 Difference]: Finished difference. Result has 589 places, 1918 transitions, 64479 flow [2023-09-01 11:58:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=63931, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=64479, PETRI_PLACES=589, PETRI_TRANSITIONS=1918} [2023-09-01 11:58:48,073 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 563 predicate places. [2023-09-01 11:58:48,073 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1918 transitions, 64479 flow [2023-09-01 11:58:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:48,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:48,074 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2023-09-01 11:58:48,074 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:48,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 83568858, now seen corresponding path program 14 times [2023-09-01 11:58:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:48,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472648012] [2023-09-01 11:58:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:58:48,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472648012] [2023-09-01 11:58:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472648012] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132514863] [2023-09-01 11:58:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:58:48,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:48,821 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) [2023-09-01 11:58:48,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 11:58:49,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:58:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 11:58:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:49,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:49,810 INFO L321 Elim1Store]: treesize reduction 44, result has 81.0 percent of original size [2023-09-01 11:58:49,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 222 [2023-09-01 11:58:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132514863] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:51,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 30 [2023-09-01 11:58:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935121244] [2023-09-01 11:58:51,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:51,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 11:58:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 11:58:51,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:58:53,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 410 [2023-09-01 11:58:53,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1918 transitions, 64479 flow. Second operand has 30 states, 30 states have (on average 148.93333333333334) internal successors, (4468), 30 states have internal predecessors, (4468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:53,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:53,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 410 [2023-09-01 11:58:53,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:12,122 INFO L130 PetriNetUnfolder]: 17607/32577 cut-off events. [2023-09-01 11:59:12,122 INFO L131 PetriNetUnfolder]: For 1167205/1167205 co-relation queries the response was YES. [2023-09-01 11:59:12,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327615 conditions, 32577 events. 17607/32577 cut-off events. For 1167205/1167205 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 284215 event pairs, 5777 based on Foata normal form. 132/32709 useless extension candidates. Maximal degree in co-relation 327469. Up to 22962 conditions per place. [2023-09-01 11:59:12,707 INFO L137 encePairwiseOnDemand]: 393/410 looper letters, 997 selfloop transitions, 1000 changer transitions 0/1997 dead transitions. [2023-09-01 11:59:12,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 1997 transitions, 69836 flow [2023-09-01 11:59:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:59:12,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:59:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2464 transitions. [2023-09-01 11:59:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2023-09-01 11:59:12,710 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2464 transitions. [2023-09-01 11:59:12,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2464 transitions. [2023-09-01 11:59:12,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:12,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2464 transitions. [2023-09-01 11:59:12,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 154.0) internal successors, (2464), 16 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,714 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 410.0) internal successors, (6970), 17 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,714 INFO L175 Difference]: Start difference. First operand has 589 places, 1918 transitions, 64479 flow. Second operand 16 states and 2464 transitions. [2023-09-01 11:59:12,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 1997 transitions, 69836 flow [2023-09-01 11:59:27,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1997 transitions, 68957 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 11:59:27,387 INFO L231 Difference]: Finished difference. Result has 597 places, 1935 transitions, 67044 flow [2023-09-01 11:59:27,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=63600, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=983, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=928, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=67044, PETRI_PLACES=597, PETRI_TRANSITIONS=1935} [2023-09-01 11:59:27,388 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 571 predicate places. [2023-09-01 11:59:27,388 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1935 transitions, 67044 flow [2023-09-01 11:59:27,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 148.93333333333334) internal successors, (4468), 30 states have internal predecessors, (4468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:27,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:27,389 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:27,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:27,594 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,SelfDestructingSolverStorable94 [2023-09-01 11:59:27,594 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:27,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 459322964, now seen corresponding path program 15 times [2023-09-01 11:59:27,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:27,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911937002] [2023-09-01 11:59:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:27,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:59:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911937002] [2023-09-01 11:59:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911937002] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046776171] [2023-09-01 11:59:28,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:59:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:28,241 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) [2023-09-01 11:59:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 11:59:28,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:59:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 11:59:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:28,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:29,544 INFO L321 Elim1Store]: treesize reduction 66, result has 79.8 percent of original size [2023-09-01 11:59:29,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 182 treesize of output 306 [2023-09-01 11:59:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046776171] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:31,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:31,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 37 [2023-09-01 11:59:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350109996] [2023-09-01 11:59:31,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 11:59:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 11:59:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2023-09-01 11:59:33,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 410 [2023-09-01 11:59:33,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1935 transitions, 67044 flow. Second operand has 37 states, 37 states have (on average 142.72972972972974) internal successors, (5281), 37 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:33,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:33,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 410 [2023-09-01 11:59:33,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:52,918 INFO L130 PetriNetUnfolder]: 17507/32533 cut-off events. [2023-09-01 11:59:52,919 INFO L131 PetriNetUnfolder]: For 1233441/1233441 co-relation queries the response was YES. [2023-09-01 11:59:53,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333496 conditions, 32533 events. 17507/32533 cut-off events. For 1233441/1233441 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 285267 event pairs, 2477 based on Foata normal form. 132/32665 useless extension candidates. Maximal degree in co-relation 333347. Up to 13374 conditions per place. [2023-09-01 11:59:54,058 INFO L137 encePairwiseOnDemand]: 392/410 looper letters, 773 selfloop transitions, 1291 changer transitions 0/2064 dead transitions. [2023-09-01 11:59:54,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 2064 transitions, 72802 flow [2023-09-01 11:59:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 11:59:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 11:59:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4417 transitions. [2023-09-01 11:59:54,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591056910569106 [2023-09-01 11:59:54,062 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4417 transitions. [2023-09-01 11:59:54,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4417 transitions. [2023-09-01 11:59:54,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:54,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4417 transitions. [2023-09-01 11:59:54,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 147.23333333333332) internal successors, (4417), 30 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:54,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 410.0) internal successors, (12710), 31 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:54,069 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 410.0) internal successors, (12710), 31 states have internal predecessors, (12710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:54,070 INFO L175 Difference]: Start difference. First operand has 597 places, 1935 transitions, 67044 flow. Second operand 30 states and 4417 transitions. [2023-09-01 11:59:54,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 2064 transitions, 72802 flow [2023-09-01 12:00:10,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 2064 transitions, 72182 flow, removed 32 selfloop flow, removed 11 redundant places. [2023-09-01 12:00:10,116 INFO L231 Difference]: Finished difference. Result has 619 places, 1956 transitions, 70011 flow [2023-09-01 12:00:10,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=66213, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=70011, PETRI_PLACES=619, PETRI_TRANSITIONS=1956} [2023-09-01 12:00:10,117 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 593 predicate places. [2023-09-01 12:00:10,118 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1956 transitions, 70011 flow [2023-09-01 12:00:10,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 142.72972972972974) internal successors, (5281), 37 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:10,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:10,118 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:10,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:10,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:10,326 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:10,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash -183102774, now seen corresponding path program 16 times [2023-09-01 12:00:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:10,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261477910] [2023-09-01 12:00:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:10,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261477910] [2023-09-01 12:00:10,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261477910] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:00:10,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:00:10,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 12:00:10,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602392594] [2023-09-01 12:00:10,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:00:10,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:00:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:00:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:00:10,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 410 [2023-09-01 12:00:10,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1956 transitions, 70011 flow. Second operand has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:10,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:10,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 410 [2023-09-01 12:00:10,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:31,331 INFO L130 PetriNetUnfolder]: 17503/32529 cut-off events. [2023-09-01 12:00:31,331 INFO L131 PetriNetUnfolder]: For 1328060/1328060 co-relation queries the response was YES. [2023-09-01 12:00:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344212 conditions, 32529 events. 17503/32529 cut-off events. For 1328060/1328060 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 285175 event pairs, 7691 based on Foata normal form. 4/32533 useless extension candidates. Maximal degree in co-relation 344059. Up to 30629 conditions per place. [2023-09-01 12:00:32,557 INFO L137 encePairwiseOnDemand]: 400/410 looper letters, 1723 selfloop transitions, 235 changer transitions 8/1966 dead transitions. [2023-09-01 12:00:32,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1966 transitions, 73922 flow [2023-09-01 12:00:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:00:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:00:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1779 transitions. [2023-09-01 12:00:32,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944567627494457 [2023-09-01 12:00:32,559 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1779 transitions. [2023-09-01 12:00:32,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1779 transitions. [2023-09-01 12:00:32,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:32,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1779 transitions. [2023-09-01 12:00:32,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.72727272727272) internal successors, (1779), 11 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:32,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:32,562 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 410.0) internal successors, (4920), 12 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:32,562 INFO L175 Difference]: Start difference. First operand has 619 places, 1956 transitions, 70011 flow. Second operand 11 states and 1779 transitions. [2023-09-01 12:00:32,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1966 transitions, 73922 flow [2023-09-01 12:00:53,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1966 transitions, 73231 flow, removed 41 selfloop flow, removed 21 redundant places. [2023-09-01 12:00:53,332 INFO L231 Difference]: Finished difference. Result has 608 places, 1948 transitions, 69492 flow [2023-09-01 12:00:53,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=410, PETRI_DIFFERENCE_MINUEND_FLOW=69206, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=69492, PETRI_PLACES=608, PETRI_TRANSITIONS=1948} [2023-09-01 12:00:53,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 582 predicate places. [2023-09-01 12:00:53,334 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1948 transitions, 69492 flow [2023-09-01 12:00:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:53,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:53,334 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2023-09-01 12:00:53,335 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:53,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash 116405824, now seen corresponding path program 17 times [2023-09-01 12:00:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:53,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228836501] [2023-09-01 12:00:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:53,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228836501] [2023-09-01 12:00:53,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228836501] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:00:53,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:00:53,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-09-01 12:00:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473438283] [2023-09-01 12:00:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:00:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:00:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:00:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:00:54,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 410 [2023-09-01 12:00:54,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1948 transitions, 69492 flow. Second operand has 12 states, 12 states have (on average 157.0) internal successors, (1884), 12 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:54,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:54,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 410 [2023-09-01 12:00:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15