./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:49:51,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:49:51,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:49:51,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:49:51,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:49:51,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:49:51,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:49:51,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:49:51,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:49:51,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:49:51,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:49:51,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:49:51,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:49:51,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:49:51,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:49:51,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:49:51,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:49:51,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:49:51,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:49:51,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:49:51,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:49:51,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:49:51,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:49:51,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:49:51,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:49:51,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:49:51,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:49:51,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:49:51,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:49:51,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:49:51,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:49:51,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:49:51,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:49:51,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:49:51,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:49:51,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:49:51,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:49:51,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:49:51,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:49:51,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:49:51,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:49:51,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:49:51,843 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:49:51,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:49:51,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:49:51,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:49:51,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:49:51,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:49:51,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:49:51,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:49:51,846 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:49:51,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:49:51,847 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:49:51,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:49:51,849 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:49:51,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:49:51,849 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:49:51,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:49:51,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:49:51,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:49:51,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:49:51,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:49:51,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:49:51,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:49:51,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:49:51,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:49:51,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:49:51,851 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:49:51,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:49:51,852 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:49:51,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:49:51,852 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:49:51,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:49:52,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:49:52,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:49:52,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:49:52,178 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:49:52,179 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:49:52,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 21:49:53,422 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:49:53,604 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:49:53,605 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-30 21:49:53,618 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cfa5646/1b3c7fcee8604a1e876dc5636b120e0a/FLAG42143f224 [2023-08-30 21:49:53,631 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01cfa5646/1b3c7fcee8604a1e876dc5636b120e0a [2023-08-30 21:49:53,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:49:53,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:49:53,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:49:53,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:49:53,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:49:53,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc456c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53, skipping insertion in model container [2023-08-30 21:49:53,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:49:53,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:49:53,797 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/unroll-3.wvr.c[2500,2513] [2023-08-30 21:49:53,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:49:53,826 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:49:53,863 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/unroll-3.wvr.c[2500,2513] [2023-08-30 21:49:53,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:49:53,884 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:49:53,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53 WrapperNode [2023-08-30 21:49:53,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:49:53,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:49:53,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:49:53,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:49:53,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,941 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-08-30 21:49:53,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:49:53,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:49:53,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:49:53,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:49:53,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:53,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:49:53,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:49:53,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:49:53,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:49:53,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (1/1) ... [2023-08-30 21:49:54,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:49:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:54,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:49:54,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:49:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:49:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:49:54,079 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:49:54,079 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:49:54,080 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:49:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:49:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:49:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:49:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 21:49:54,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:49:54,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:49:54,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:49:54,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:49:54,083 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:49:54,202 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:49:54,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:49:54,507 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:49:54,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:49:54,515 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 21:49:54,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:49:54 BoogieIcfgContainer [2023-08-30 21:49:54,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:49:54,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:49:54,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:49:54,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:49:54,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:49:53" (1/3) ... [2023-08-30 21:49:54,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30475bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:49:54, skipping insertion in model container [2023-08-30 21:49:54,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:53" (2/3) ... [2023-08-30 21:49:54,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30475bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:49:54, skipping insertion in model container [2023-08-30 21:49:54,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:49:54" (3/3) ... [2023-08-30 21:49:54,524 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-08-30 21:49:54,531 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:49:54,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:49:54,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:49:54,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:49:54,638 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:49:54,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-08-30 21:49:54,750 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-08-30 21:49:54,750 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:54,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 21:49:54,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-08-30 21:49:54,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-08-30 21:49:54,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:49:54,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-08-30 21:49:54,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-08-30 21:49:54,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-08-30 21:49:54,810 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-08-30 21:49:54,810 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:54,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-30 21:49:54,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-08-30 21:49:59,478 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-08-30 21:49:59,479 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-30 21:49:59,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:49:59,495 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;@1e586136, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:49:59,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:49:59,499 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-30 21:49:59,500 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:59,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:59,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:59,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:59,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-08-30 21:49:59,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:59,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767543805] [2023-08-30 21:49:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:59,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767543805] [2023-08-30 21:49:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767543805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 21:49:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801181299] [2023-08-30 21:49:59,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:49:59,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:59,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:49:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:49:59,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 355 [2023-08-30 21:49:59,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:59,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:59,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 355 [2023-08-30 21:49:59,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:00,020 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-08-30 21:50:00,021 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 21:50:00,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-30 21:50:00,024 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-30 21:50:00,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-30 21:50:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:50:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:50:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 21:50:00,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356807511737089 [2023-08-30 21:50:00,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 21:50:00,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 21:50:00,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:00,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 21:50:00,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,063 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 464 transitions. [2023-08-30 21:50:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-30 21:50:00,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:50:00,068 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-30 21:50:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-30 21:50:00,073 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-30 21:50:00,073 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-30 21:50:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:00,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:00,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:50:00,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:00,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-08-30 21:50:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428176035] [2023-08-30 21:50:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:00,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:00,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428176035] [2023-08-30 21:50:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428176035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:00,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:00,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:50:00,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986185465] [2023-08-30 21:50:00,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:00,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:50:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:50:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:50:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 355 [2023-08-30 21:50:00,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:00,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 355 [2023-08-30 21:50:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:00,362 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-30 21:50:00,362 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:50:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-30 21:50:00,363 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-30 21:50:00,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-30 21:50:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:50:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:50:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-30 21:50:00,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384976525821596 [2023-08-30 21:50:00,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-30 21:50:00,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-30 21:50:00,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:00,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-30 21:50:00,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,371 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 467 transitions. [2023-08-30 21:50:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-30 21:50:00,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:50:00,372 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-30 21:50:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-30 21:50:00,373 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-30 21:50:00,373 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-30 21:50:00,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:00,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:00,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:50:00,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:00,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-08-30 21:50:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:00,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495251974] [2023-08-30 21:50:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495251974] [2023-08-30 21:50:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495251974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:00,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:50:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517368120] [2023-08-30 21:50:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:00,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:50:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:00,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:50:00,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:50:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-30 21:50:00,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:00,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-30 21:50:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:00,731 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-08-30 21:50:00,731 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-30 21:50:00,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-08-30 21:50:00,735 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-08-30 21:50:00,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-08-30 21:50:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:50:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:50:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-08-30 21:50:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230985915492958 [2023-08-30 21:50:00,739 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-08-30 21:50:00,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-08-30 21:50:00,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:00,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-08-30 21:50:00,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,745 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 751 transitions. [2023-08-30 21:50:00,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-08-30 21:50:00,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:50:00,748 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-08-30 21:50:00,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 21:50:00,749 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-30 21:50:00,752 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-08-30 21:50:00,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:00,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:00,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:00,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:50:00,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:00,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-08-30 21:50:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:00,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976445876] [2023-08-30 21:50:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:00,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:00,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976445876] [2023-08-30 21:50:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976445876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284062322] [2023-08-30 21:50:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:50:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:00,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:00,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:00,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:50:01,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:50:01,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:50:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:01,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284062322] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:01,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:50:01,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-30 21:50:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081982969] [2023-08-30 21:50:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:50:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:50:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:50:01,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-08-30 21:50:01,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:01,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-08-30 21:50:01,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:01,361 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-08-30 21:50:01,361 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-08-30 21:50:01,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-08-30 21:50:01,363 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-08-30 21:50:01,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-08-30 21:50:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:50:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:50:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-30 21:50:01,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43380281690140843 [2023-08-30 21:50:01,366 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-30 21:50:01,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-30 21:50:01,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:01,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-30 21:50:01,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,371 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,371 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 616 transitions. [2023-08-30 21:50:01,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-08-30 21:50:01,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 21:50:01,374 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-08-30 21:50:01,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-30 21:50:01,374 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-08-30 21:50:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-08-30 21:50:01,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:01,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:01,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:01,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-08-30 21:50:01,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:01,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692737997] [2023-08-30 21:50:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:01,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:01,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692737997] [2023-08-30 21:50:01,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692737997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:01,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:01,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:50:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263240943] [2023-08-30 21:50:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:01,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:50:01,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:50:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:50:01,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:50:01,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:01,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:50:01,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:01,891 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-08-30 21:50:01,892 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-08-30 21:50:01,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-08-30 21:50:01,893 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-08-30 21:50:01,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-08-30 21:50:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:50:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:50:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 891 transitions. [2023-08-30 21:50:01,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183098591549296 [2023-08-30 21:50:01,897 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 891 transitions. [2023-08-30 21:50:01,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 891 transitions. [2023-08-30 21:50:01,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:01,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 891 transitions. [2023-08-30 21:50:01,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,905 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 891 transitions. [2023-08-30 21:50:01,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-08-30 21:50:01,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:50:01,910 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-08-30 21:50:01,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-30 21:50:01,911 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-08-30 21:50:01,911 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-08-30 21:50:01,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:01,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:01,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:01,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:50:01,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:01,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-08-30 21:50:01,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:01,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279322317] [2023-08-30 21:50:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279322317] [2023-08-30 21:50:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279322317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:02,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:50:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187890586] [2023-08-30 21:50:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:50:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:50:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:50:02,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-08-30 21:50:02,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:02,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-08-30 21:50:02,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:02,105 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-08-30 21:50:02,105 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-08-30 21:50:02,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-08-30 21:50:02,113 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-08-30 21:50:02,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-08-30 21:50:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:50:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:50:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2023-08-30 21:50:02,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43309859154929575 [2023-08-30 21:50:02,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2023-08-30 21:50:02,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2023-08-30 21:50:02,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:02,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2023-08-30 21:50:02,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,120 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 615 transitions. [2023-08-30 21:50:02,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-08-30 21:50:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:50:02,123 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-08-30 21:50:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-30 21:50:02,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-30 21:50:02,124 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-08-30 21:50:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:02,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:02,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:50:02,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:02,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-08-30 21:50:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427087653] [2023-08-30 21:50:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:02,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427087653] [2023-08-30 21:50:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427087653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:02,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:50:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893876827] [2023-08-30 21:50:02,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:50:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:50:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:50:02,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-30 21:50:02,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:02,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-30 21:50:02,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:02,360 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-08-30 21:50:02,360 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-30 21:50:02,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-08-30 21:50:02,361 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-08-30 21:50:02,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-08-30 21:50:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:50:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:50:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 894 transitions. [2023-08-30 21:50:02,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-30 21:50:02,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 894 transitions. [2023-08-30 21:50:02,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 894 transitions. [2023-08-30 21:50:02,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:02,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 894 transitions. [2023-08-30 21:50:02,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,370 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,370 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 894 transitions. [2023-08-30 21:50:02,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-08-30 21:50:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 21:50:02,373 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-08-30 21:50:02,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 21:50:02,374 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-08-30 21:50:02,374 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-08-30 21:50:02,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:02,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:50:02,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:02,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:02,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-08-30 21:50:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:02,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590419513] [2023-08-30 21:50:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590419513] [2023-08-30 21:50:02,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590419513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:50:02,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:50:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:50:02,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562724789] [2023-08-30 21:50:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:50:02,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:50:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:50:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:50:02,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-30 21:50:02,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:02,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-30 21:50:02,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:02,626 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-08-30 21:50:02,626 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-08-30 21:50:02,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-08-30 21:50:02,628 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-08-30 21:50:02,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-08-30 21:50:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:50:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:50:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-30 21:50:02,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-30 21:50:02,631 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-30 21:50:02,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-30 21:50:02,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:02,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-30 21:50:02,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,636 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,636 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 745 transitions. [2023-08-30 21:50:02,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-08-30 21:50:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 21:50:02,639 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-08-30 21:50:02,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-30 21:50:02,642 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-30 21:50:02,642 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-08-30 21:50:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:02,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:02,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:02,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:50:02,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:02,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-08-30 21:50:02,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:02,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641527950] [2023-08-30 21:50:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:02,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:02,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641527950] [2023-08-30 21:50:02,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641527950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:02,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922815329] [2023-08-30 21:50:02,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:50:02,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:02,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:02,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:50:02,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:50:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:50:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:02,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922815329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:02,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:02,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 21:50:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794369931] [2023-08-30 21:50:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:02,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:50:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:50:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:50:03,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:50:03,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:03,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:50:03,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:03,307 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-08-30 21:50:03,308 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-08-30 21:50:03,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-08-30 21:50:03,309 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-08-30 21:50:03,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-08-30 21:50:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:50:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:50:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2023-08-30 21:50:03,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164989939637827 [2023-08-30 21:50:03,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2023-08-30 21:50:03,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2023-08-30 21:50:03,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:03,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2023-08-30 21:50:03,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,321 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,321 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1035 transitions. [2023-08-30 21:50:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-08-30 21:50:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 21:50:03,326 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-08-30 21:50:03,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-30 21:50:03,327 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-08-30 21:50:03,327 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-08-30 21:50:03,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:03,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:03,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:03,529 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,SelfDestructingSolverStorable8 [2023-08-30 21:50:03,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:03,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-08-30 21:50:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260915420] [2023-08-30 21:50:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260915420] [2023-08-30 21:50:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260915420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131865978] [2023-08-30 21:50:03,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:50:03,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:03,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:03,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:50:03,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:50:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:50:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:03,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131865978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:03,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 21:50:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025213321] [2023-08-30 21:50:03,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:03,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:50:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:50:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 21:50:03,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:50:03,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:03,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:03,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:50:03,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:04,059 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-08-30 21:50:04,060 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-08-30 21:50:04,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-08-30 21:50:04,062 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-08-30 21:50:04,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-08-30 21:50:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:50:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:50:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-08-30 21:50:04,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746478873239434 [2023-08-30 21:50:04,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-08-30 21:50:04,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-08-30 21:50:04,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:04,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-08-30 21:50:04,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:04,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:04,070 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:04,070 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 741 transitions. [2023-08-30 21:50:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-08-30 21:50:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 21:50:04,074 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-08-30 21:50:04,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-30 21:50:04,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-30 21:50:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-08-30 21:50:04,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:04,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:04,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:04,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:04,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:04,285 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:04,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-08-30 21:50:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:04,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290090156] [2023-08-30 21:50:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:50:04,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290090156] [2023-08-30 21:50:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290090156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010010277] [2023-08-30 21:50:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:04,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:04,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:50:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 21:50:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:04,958 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-30 21:50:04,958 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-08-30 21:50:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:04,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:05,115 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-30 21:50:05,116 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-08-30 21:50:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010010277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:05,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 21:50:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634528559] [2023-08-30 21:50:05,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:50:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:50:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:50:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-08-30 21:50:06,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:06,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:06,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-08-30 21:50:06,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:07,335 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-08-30 21:50:07,336 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-08-30 21:50:07,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-08-30 21:50:07,339 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-08-30 21:50:07,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-08-30 21:50:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:50:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:50:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2886 transitions. [2023-08-30 21:50:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36952624839948783 [2023-08-30 21:50:07,347 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2886 transitions. [2023-08-30 21:50:07,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2886 transitions. [2023-08-30 21:50:07,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:07,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2886 transitions. [2023-08-30 21:50:07,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.1818181818182) internal successors, (2886), 22 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:07,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:07,365 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:07,365 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2886 transitions. [2023-08-30 21:50:07,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-08-30 21:50:07,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-30 21:50:07,372 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-08-30 21:50:07,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-08-30 21:50:07,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-08-30 21:50:07,373 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-08-30 21:50:07,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:07,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:07,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:07,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:07,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:07,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-08-30 21:50:07,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:07,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421074691] [2023-08-30 21:50:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:07,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:08,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421074691] [2023-08-30 21:50:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421074691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078701893] [2023-08-30 21:50:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:50:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:08,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:08,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:50:08,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:50:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 21:50:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:50:08,414 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-08-30 21:50:08,415 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-08-30 21:50:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:08,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:08,565 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-30 21:50:08,565 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-08-30 21:50:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078701893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:08,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:08,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-08-30 21:50:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877570181] [2023-08-30 21:50:08,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:50:08,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:50:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:50:10,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-08-30 21:50:10,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:10,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:10,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-08-30 21:50:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:15,210 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-08-30 21:50:15,210 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-08-30 21:50:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-08-30 21:50:15,214 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-08-30 21:50:15,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-08-30 21:50:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 21:50:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 21:50:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3398 transitions. [2023-08-30 21:50:15,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36814734561213436 [2023-08-30 21:50:15,223 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3398 transitions. [2023-08-30 21:50:15,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3398 transitions. [2023-08-30 21:50:15,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:15,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3398 transitions. [2023-08-30 21:50:15,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 130.69230769230768) internal successors, (3398), 26 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:15,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:15,266 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 3398 transitions. [2023-08-30 21:50:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-08-30 21:50:15,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-08-30 21:50:15,275 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-08-30 21:50:15,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-08-30 21:50:15,276 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-30 21:50:15,276 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-08-30 21:50:15,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:15,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:15,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:15,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:15,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 21:50:15,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:15,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-08-30 21:50:15,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862470529] [2023-08-30 21:50:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:16,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862470529] [2023-08-30 21:50:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862470529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073418098] [2023-08-30 21:50:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:50:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:16,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:16,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:50:16,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:50:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 21:50:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:16,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:50:16,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:50:16,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:50:16,485 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:50:16,495 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-08-30 21:50:16,495 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-08-30 21:50:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:16,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:16,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2023-08-30 21:50:16,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:16,887 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-08-30 21:50:16,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:16,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-08-30 21:50:16,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:16,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-08-30 21:50:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:18,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073418098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:18,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:18,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-08-30 21:50:18,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886317326] [2023-08-30 21:50:18,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:18,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:50:18,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:50:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=231, Unknown=7, NotChecked=0, Total=306 [2023-08-30 21:50:20,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:50:22,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:50:24,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:50:24,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-30 21:50:24,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:24,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:24,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-30 21:50:24,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:25,113 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-08-30 21:50:25,113 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-08-30 21:50:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-08-30 21:50:25,116 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-08-30 21:50:25,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-08-30 21:50:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:50:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:50:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-08-30 21:50:25,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-08-30 21:50:25,127 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-08-30 21:50:25,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-08-30 21:50:25,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:25,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-08-30 21:50:25,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:25,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:25,132 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:25,132 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-08-30 21:50:25,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-08-30 21:50:25,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-08-30 21:50:25,139 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-08-30 21:50:25,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-08-30 21:50:25,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-08-30 21:50:25,140 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-08-30 21:50:25,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:25,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:25,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:25,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:25,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:25,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:25,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-08-30 21:50:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:25,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597746828] [2023-08-30 21:50:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:27,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597746828] [2023-08-30 21:50:27,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597746828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:27,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940128648] [2023-08-30 21:50:27,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:50:27,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:27,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:27,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:50:27,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:50:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:50:27,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:27,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:27,818 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:50:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:27,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:28,048 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-30 21:50:28,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-30 21:50:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:50:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940128648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:28,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:28,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-30 21:50:28,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522708013] [2023-08-30 21:50:28,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:28,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:50:28,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:50:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:50:29,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-30 21:50:29,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:29,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:29,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-30 21:50:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:31,005 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-08-30 21:50:31,005 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-08-30 21:50:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-08-30 21:50:31,012 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-08-30 21:50:31,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-08-30 21:50:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:50:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:50:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2571 transitions. [2023-08-30 21:50:31,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38117123795404 [2023-08-30 21:50:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2571 transitions. [2023-08-30 21:50:31,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2571 transitions. [2023-08-30 21:50:31,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:31,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2571 transitions. [2023-08-30 21:50:31,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.31578947368422) internal successors, (2571), 19 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:31,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:31,045 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:31,045 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2571 transitions. [2023-08-30 21:50:31,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-08-30 21:50:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-08-30 21:50:31,058 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-08-30 21:50:31,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-08-30 21:50:31,058 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-08-30 21:50:31,059 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-08-30 21:50:31,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:31,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:31,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:31,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:31,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:31,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:31,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-08-30 21:50:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373900926] [2023-08-30 21:50:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:32,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373900926] [2023-08-30 21:50:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373900926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:32,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064558621] [2023-08-30 21:50:32,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:50:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:32,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:32,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:50:32,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:50:32,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:50:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 21:50:33,067 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-08-30 21:50:33,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-08-30 21:50:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:33,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:33,333 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-30 21:50:33,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-30 21:50:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:50:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064558621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-08-30 21:50:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55200185] [2023-08-30 21:50:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 21:50:33,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 21:50:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-30 21:50:34,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-30 21:50:34,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:34,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:34,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-30 21:50:34,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:35,815 INFO L130 PetriNetUnfolder]: 586/1046 cut-off events. [2023-08-30 21:50:35,815 INFO L131 PetriNetUnfolder]: For 4386/4420 co-relation queries the response was YES. [2023-08-30 21:50:35,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 1046 events. 586/1046 cut-off events. For 4386/4420 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5106 event pairs, 75 based on Foata normal form. 28/1063 useless extension candidates. Maximal degree in co-relation 4871. Up to 610 conditions per place. [2023-08-30 21:50:35,824 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-08-30 21:50:35,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-08-30 21:50:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:50:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:50:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2696 transitions. [2023-08-30 21:50:35,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37971830985915495 [2023-08-30 21:50:35,830 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2696 transitions. [2023-08-30 21:50:35,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2696 transitions. [2023-08-30 21:50:35,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:35,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2696 transitions. [2023-08-30 21:50:35,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.8) internal successors, (2696), 20 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:35,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:35,846 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:35,846 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2696 transitions. [2023-08-30 21:50:35,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-08-30 21:50:35,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-30 21:50:35,866 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-08-30 21:50:35,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-08-30 21:50:35,867 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-08-30 21:50:35,867 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-08-30 21:50:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:35,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:50:36,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:36,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1517782303, now seen corresponding path program 6 times [2023-08-30 21:50:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303242971] [2023-08-30 21:50:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:37,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303242971] [2023-08-30 21:50:37,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303242971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:37,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185740794] [2023-08-30 21:50:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:50:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:37,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:37,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:50:37,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:50:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:50:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:37,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:37,614 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:50:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:37,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:37,802 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-30 21:50:37,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-30 21:50:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-30 21:50:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185740794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:38,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:38,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-30 21:50:38,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406765921] [2023-08-30 21:50:38,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:50:38,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:50:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:50:39,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-30 21:50:39,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:39,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:39,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-30 21:50:39,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:39,925 INFO L130 PetriNetUnfolder]: 758/1355 cut-off events. [2023-08-30 21:50:39,925 INFO L131 PetriNetUnfolder]: For 6049/6089 co-relation queries the response was YES. [2023-08-30 21:50:39,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7009 conditions, 1355 events. 758/1355 cut-off events. For 6049/6089 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6943 event pairs, 111 based on Foata normal form. 35/1379 useless extension candidates. Maximal degree in co-relation 6962. Up to 938 conditions per place. [2023-08-30 21:50:39,937 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-08-30 21:50:39,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-08-30 21:50:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:50:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:50:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2285 transitions. [2023-08-30 21:50:39,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37862468931234466 [2023-08-30 21:50:39,942 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2285 transitions. [2023-08-30 21:50:39,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2285 transitions. [2023-08-30 21:50:39,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:39,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2285 transitions. [2023-08-30 21:50:39,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.41176470588235) internal successors, (2285), 17 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) [2023-08-30 21:50:39,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:39,951 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:39,951 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 2285 transitions. [2023-08-30 21:50:39,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-08-30 21:50:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-08-30 21:50:39,972 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-08-30 21:50:39,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-08-30 21:50:39,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-08-30 21:50:39,973 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-08-30 21:50:39,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:39,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:39,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:39,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:50:40,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:40,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 272711525, now seen corresponding path program 7 times [2023-08-30 21:50:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:40,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616158891] [2023-08-30 21:50:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616158891] [2023-08-30 21:50:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616158891] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293128519] [2023-08-30 21:50:41,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:50:41,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:41,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:41,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:50:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 21:50:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:41,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:41,357 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:50:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:41,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:41,549 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-30 21:50:41,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-30 21:50:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:50:41,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293128519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:41,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:41,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-30 21:50:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597988294] [2023-08-30 21:50:41,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:50:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:50:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:50:42,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 355 [2023-08-30 21:50:42,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:42,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:42,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 355 [2023-08-30 21:50:42,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:43,386 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-08-30 21:50:43,386 INFO L131 PetriNetUnfolder]: For 8685/8727 co-relation queries the response was YES. [2023-08-30 21:50:43,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8685/8727 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10330 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-08-30 21:50:43,401 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-08-30 21:50:43,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-08-30 21:50:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:50:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:50:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2792 transitions. [2023-08-30 21:50:43,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323943661971833 [2023-08-30 21:50:43,406 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2792 transitions. [2023-08-30 21:50:43,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2792 transitions. [2023-08-30 21:50:43,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:43,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2792 transitions. [2023-08-30 21:50:43,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 139.6) internal successors, (2792), 20 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:43,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:43,420 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:43,421 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2792 transitions. [2023-08-30 21:50:43,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-08-30 21:50:43,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-08-30 21:50:43,452 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-08-30 21:50:43,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-08-30 21:50:43,453 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-08-30 21:50:43,453 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-08-30 21:50:43,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:43,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:43,454 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:43,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:50:43,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:43,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-08-30 21:50:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086830651] [2023-08-30 21:50:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:44,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:44,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086830651] [2023-08-30 21:50:44,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086830651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:44,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648427521] [2023-08-30 21:50:44,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:50:44,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:44,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:44,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:44,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:50:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:50:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:50:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:50:44,909 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 [2023-08-30 21:50:45,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:45,010 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:50:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:50:45,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:45,114 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4)))))) is different from false [2023-08-30 21:50:45,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:45,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-08-30 21:50:45,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:45,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-08-30 21:50:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:50:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648427521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:50:46,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:50:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-30 21:50:46,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725043657] [2023-08-30 21:50:46,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:50:46,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:50:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:50:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:50:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-08-30 21:50:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-08-30 21:50:46,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:46,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:50:46,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-08-30 21:50:46,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:50:47,437 INFO L130 PetriNetUnfolder]: 1315/2368 cut-off events. [2023-08-30 21:50:47,437 INFO L131 PetriNetUnfolder]: For 12858/12900 co-relation queries the response was YES. [2023-08-30 21:50:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13103 conditions, 2368 events. 1315/2368 cut-off events. For 12858/12900 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13803 event pairs, 202 based on Foata normal form. 36/2393 useless extension candidates. Maximal degree in co-relation 13044. Up to 1492 conditions per place. [2023-08-30 21:50:47,458 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 188 selfloop transitions, 138 changer transitions 2/334 dead transitions. [2023-08-30 21:50:47,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 334 transitions, 4559 flow [2023-08-30 21:50:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 21:50:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 21:50:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2522 transitions. [2023-08-30 21:50:47,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229193341869398 [2023-08-30 21:50:47,462 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2522 transitions. [2023-08-30 21:50:47,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2522 transitions. [2023-08-30 21:50:47,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:50:47,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2522 transitions. [2023-08-30 21:50:47,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.63636363636364) internal successors, (2522), 22 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:47,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:47,472 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:47,472 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 22 states and 2522 transitions. [2023-08-30 21:50:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 334 transitions, 4559 flow [2023-08-30 21:50:47,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 334 transitions, 4319 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-08-30 21:50:47,524 INFO L231 Difference]: Finished difference. Result has 148 places, 273 transitions, 3840 flow [2023-08-30 21:50:47,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3840, PETRI_PLACES=148, PETRI_TRANSITIONS=273} [2023-08-30 21:50:47,525 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-08-30 21:50:47,525 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 273 transitions, 3840 flow [2023-08-30 21:50:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:50:47,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:50:47,526 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:50:47,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:50:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:50:47,737 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:50:47,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:50:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-08-30 21:50:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:50:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072109054] [2023-08-30 21:50:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:50:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:50:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:50:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:50:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072109054] [2023-08-30 21:50:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072109054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:50:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081414912] [2023-08-30 21:50:49,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:50:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:50:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:50:49,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:50:49,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:50:49,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:50:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:50:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 21:50:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:50:49,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 21:50:49,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 21:50:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:50:49,635 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 [2023-08-30 21:50:49,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:49,749 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-08-30 21:50:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:50:49,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:50:50,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:50,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 215 [2023-08-30 21:50:50,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:50,434 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 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-08-30 21:50:50,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:50,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-08-30 21:50:50,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:50:50,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-08-30 21:53:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081414912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:28,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 21:53:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780698931] [2023-08-30 21:53:28,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:28,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 21:53:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:28,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 21:53:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=590, Unknown=7, NotChecked=0, Total=702 [2023-08-30 21:53:29,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-30 21:53:29,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 273 transitions, 3840 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:29,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:29,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-30 21:53:29,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:29,584 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~x1~0 c_~x2~0))) (and (or (let ((.cse0 (< c_~size~0 2))) (and (or .cse0 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or .cse1 .cse0))) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~2#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse2 (select .cse3 (+ c_~f~0.offset (* (select .cse3 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse4 (select .cse3 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse2 0) (= (select .cse3 (+ (* .cse4 4) c_~f~0.offset)) (select .cse3 (+ c_~f~0.offset (* 4 .cse2)))) (<= c_~size~0 .cse2) (< .cse4 0) (<= c_~size~0 .cse4))))) .cse1)) is different from false [2023-08-30 21:53:29,679 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse2 (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* .cse2 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* 4 .cse0)))) (<= c_~size~0 .cse0) (< .cse2 0) (<= c_~size~0 .cse2))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-08-30 21:53:31,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:38,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:53:41,937 INFO L130 PetriNetUnfolder]: 1915/3456 cut-off events. [2023-08-30 21:53:41,938 INFO L131 PetriNetUnfolder]: For 24987/25097 co-relation queries the response was YES. [2023-08-30 21:53:41,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21285 conditions, 3456 events. 1915/3456 cut-off events. For 24987/25097 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22209 event pairs, 405 based on Foata normal form. 102/3535 useless extension candidates. Maximal degree in co-relation 20508. Up to 1999 conditions per place. [2023-08-30 21:53:41,968 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 259 selfloop transitions, 211 changer transitions 2/478 dead transitions. [2023-08-30 21:53:41,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 478 transitions, 7021 flow [2023-08-30 21:53:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:53:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:53:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3235 transitions. [2023-08-30 21:53:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31423020883924235 [2023-08-30 21:53:41,973 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3235 transitions. [2023-08-30 21:53:41,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3235 transitions. [2023-08-30 21:53:41,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:41,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3235 transitions. [2023-08-30 21:53:41,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.55172413793103) internal successors, (3235), 29 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:41,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:41,985 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:41,985 INFO L175 Difference]: Start difference. First operand has 148 places, 273 transitions, 3840 flow. Second operand 29 states and 3235 transitions. [2023-08-30 21:53:41,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 478 transitions, 7021 flow [2023-08-30 21:53:42,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 478 transitions, 6668 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-08-30 21:53:42,068 INFO L231 Difference]: Finished difference. Result has 178 places, 396 transitions, 6064 flow [2023-08-30 21:53:42,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6064, PETRI_PLACES=178, PETRI_TRANSITIONS=396} [2023-08-30 21:53:42,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-08-30 21:53:42,068 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 396 transitions, 6064 flow [2023-08-30 21:53:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:42,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:42,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:42,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:42,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:42,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:42,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1813313051, now seen corresponding path program 10 times [2023-08-30 21:53:42,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:42,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299767562] [2023-08-30 21:53:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:43,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299767562] [2023-08-30 21:53:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299767562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90535359] [2023-08-30 21:53:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:53:43,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:43,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:43,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:53:43,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 21:53:43,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:53:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 21:53:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:53:43,720 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 [2023-08-30 21:53:43,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:43,807 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:53:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:53:43,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:43,889 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_531 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_531) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-08-30 21:53:43,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:43,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-08-30 21:53:44,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:44,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-08-30 21:53:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:44,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90535359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:44,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:44,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-30 21:53:44,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536149170] [2023-08-30 21:53:44,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:44,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:53:44,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:53:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-08-30 21:53:44,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-30 21:53:44,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 396 transitions, 6064 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 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) [2023-08-30 21:53:44,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:44,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-30 21:53:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:46,154 INFO L130 PetriNetUnfolder]: 2176/3923 cut-off events. [2023-08-30 21:53:46,154 INFO L131 PetriNetUnfolder]: For 33157/33255 co-relation queries the response was YES. [2023-08-30 21:53:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25555 conditions, 3923 events. 2176/3923 cut-off events. For 33157/33255 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25739 event pairs, 381 based on Foata normal form. 92/4000 useless extension candidates. Maximal degree in co-relation 24668. Up to 2851 conditions per place. [2023-08-30 21:53:46,202 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 320 selfloop transitions, 164 changer transitions 2/492 dead transitions. [2023-08-30 21:53:46,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 492 transitions, 8194 flow [2023-08-30 21:53:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 21:53:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 21:53:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2340 transitions. [2023-08-30 21:53:46,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31388329979879276 [2023-08-30 21:53:46,207 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2340 transitions. [2023-08-30 21:53:46,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2340 transitions. [2023-08-30 21:53:46,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:46,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2340 transitions. [2023-08-30 21:53:46,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.42857142857143) internal successors, (2340), 21 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:46,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:46,215 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:46,215 INFO L175 Difference]: Start difference. First operand has 178 places, 396 transitions, 6064 flow. Second operand 21 states and 2340 transitions. [2023-08-30 21:53:46,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 492 transitions, 8194 flow [2023-08-30 21:53:46,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 492 transitions, 7746 flow, removed 193 selfloop flow, removed 11 redundant places. [2023-08-30 21:53:46,392 INFO L231 Difference]: Finished difference. Result has 193 places, 438 transitions, 7003 flow [2023-08-30 21:53:46,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7003, PETRI_PLACES=193, PETRI_TRANSITIONS=438} [2023-08-30 21:53:46,393 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2023-08-30 21:53:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 438 transitions, 7003 flow [2023-08-30 21:53:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 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) [2023-08-30 21:53:46,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:46,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:46,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:46,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-30 21:53:46,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:46,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1829345087, now seen corresponding path program 11 times [2023-08-30 21:53:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854562502] [2023-08-30 21:53:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:46,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:48,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854562502] [2023-08-30 21:53:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854562502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16208243] [2023-08-30 21:53:48,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:53:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:48,244 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:53:48,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 21:53:48,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:53:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 21:53:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:53:48,518 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 30 treesize of output 28 [2023-08-30 21:53:48,593 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2023-08-30 21:53:48,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 68 [2023-08-30 21:53:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:48,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:48,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:48,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-08-30 21:53:48,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:48,858 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 72 [2023-08-30 21:53:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:49,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16208243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:49,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:49,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-30 21:53:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352078810] [2023-08-30 21:53:49,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 21:53:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 21:53:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=439, Unknown=3, NotChecked=0, Total=506 [2023-08-30 21:53:50,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 355 [2023-08-30 21:53:50,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 438 transitions, 7003 flow. Second operand has 23 states, 23 states have (on average 109.65217391304348) internal successors, (2522), 23 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:50,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:50,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 355 [2023-08-30 21:53:50,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:52,356 INFO L130 PetriNetUnfolder]: 2710/4911 cut-off events. [2023-08-30 21:53:52,356 INFO L131 PetriNetUnfolder]: For 48790/48906 co-relation queries the response was YES. [2023-08-30 21:53:52,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34360 conditions, 4911 events. 2710/4911 cut-off events. For 48790/48906 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 33658 event pairs, 504 based on Foata normal form. 113/5008 useless extension candidates. Maximal degree in co-relation 33401. Up to 3188 conditions per place. [2023-08-30 21:53:52,408 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 330 selfloop transitions, 246 changer transitions 3/585 dead transitions. [2023-08-30 21:53:52,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 585 transitions, 10253 flow [2023-08-30 21:53:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 21:53:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 21:53:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2289 transitions. [2023-08-30 21:53:52,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3223943661971831 [2023-08-30 21:53:52,412 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2289 transitions. [2023-08-30 21:53:52,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2289 transitions. [2023-08-30 21:53:52,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:52,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2289 transitions. [2023-08-30 21:53:52,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.45) internal successors, (2289), 20 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:52,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:52,420 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:52,420 INFO L175 Difference]: Start difference. First operand has 193 places, 438 transitions, 7003 flow. Second operand 20 states and 2289 transitions. [2023-08-30 21:53:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 585 transitions, 10253 flow [2023-08-30 21:53:52,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 585 transitions, 9941 flow, removed 112 selfloop flow, removed 10 redundant places. [2023-08-30 21:53:52,651 INFO L231 Difference]: Finished difference. Result has 210 places, 516 transitions, 9167 flow [2023-08-30 21:53:52,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9167, PETRI_PLACES=210, PETRI_TRANSITIONS=516} [2023-08-30 21:53:52,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2023-08-30 21:53:52,652 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 516 transitions, 9167 flow [2023-08-30 21:53:52,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 109.65217391304348) internal successors, (2522), 23 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:52,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:52,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:52,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:52,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:52,859 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:52,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash -350264867, now seen corresponding path program 12 times [2023-08-30 21:53:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:52,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409825764] [2023-08-30 21:53:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:53:54,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409825764] [2023-08-30 21:53:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409825764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896694447] [2023-08-30 21:53:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:53:54,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:54,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:53:54,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 21:53:54,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:53:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:53:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 21:53:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 21:53:54,631 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 20 treesize of output 20 [2023-08-30 21:53:54,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:54,700 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-30 21:53:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:53:54,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:54,763 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-08-30 21:53:54,768 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-08-30 21:53:54,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:54,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-08-30 21:53:54,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 21:53:54,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-08-30 21:53:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-08-30 21:53:55,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896694447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:55,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:55,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-30 21:53:55,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126108833] [2023-08-30 21:53:55,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:55,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 21:53:55,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 21:53:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=402, Unknown=2, NotChecked=82, Total=552 [2023-08-30 21:53:55,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-30 21:53:55,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 516 transitions, 9167 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:55,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:53:55,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-30 21:53:55,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:53:57,291 INFO L130 PetriNetUnfolder]: 3070/5524 cut-off events. [2023-08-30 21:53:57,291 INFO L131 PetriNetUnfolder]: For 69862/69983 co-relation queries the response was YES. [2023-08-30 21:53:57,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40986 conditions, 5524 events. 3070/5524 cut-off events. For 69862/69983 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38585 event pairs, 637 based on Foata normal form. 120/5622 useless extension candidates. Maximal degree in co-relation 39915. Up to 4083 conditions per place. [2023-08-30 21:53:57,340 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 380 selfloop transitions, 248 changer transitions 2/636 dead transitions. [2023-08-30 21:53:57,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 636 transitions, 12420 flow [2023-08-30 21:53:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 21:53:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 21:53:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2124 transitions. [2023-08-30 21:53:57,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31489992587101556 [2023-08-30 21:53:57,343 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2124 transitions. [2023-08-30 21:53:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2124 transitions. [2023-08-30 21:53:57,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:53:57,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2124 transitions. [2023-08-30 21:53:57,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.78947368421052) internal successors, (2124), 19 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:57,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:57,350 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:57,351 INFO L175 Difference]: Start difference. First operand has 210 places, 516 transitions, 9167 flow. Second operand 19 states and 2124 transitions. [2023-08-30 21:53:57,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 636 transitions, 12420 flow [2023-08-30 21:53:57,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 636 transitions, 11977 flow, removed 190 selfloop flow, removed 7 redundant places. [2023-08-30 21:53:57,657 INFO L231 Difference]: Finished difference. Result has 228 places, 587 transitions, 11213 flow [2023-08-30 21:53:57,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=8776, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11213, PETRI_PLACES=228, PETRI_TRANSITIONS=587} [2023-08-30 21:53:57,657 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-08-30 21:53:57,657 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 587 transitions, 11213 flow [2023-08-30 21:53:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:53:57,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:53:57,658 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:53:57,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 21:53:57,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:57,859 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:53:57,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:53:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2040900387, now seen corresponding path program 13 times [2023-08-30 21:53:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:53:57,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130355623] [2023-08-30 21:53:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:53:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:53:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:58,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:53:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130355623] [2023-08-30 21:53:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130355623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:53:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479945414] [2023-08-30 21:53:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:53:58,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:53:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:53:58,007 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:53:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 21:53:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:53:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:53:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:53:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:58,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:53:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:53:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479945414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:53:59,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:53:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-30 21:53:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10579954] [2023-08-30 21:53:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:53:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 21:53:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:53:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 21:53:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-30 21:54:00,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:54:00,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 587 transitions, 11213 flow. Second operand has 15 states, 15 states have (on average 143.06666666666666) internal successors, (2146), 15 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:00,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:00,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:54:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:15,316 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 35 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:54:24,897 INFO L130 PetriNetUnfolder]: 6801/12346 cut-off events. [2023-08-30 21:54:24,897 INFO L131 PetriNetUnfolder]: For 168552/168552 co-relation queries the response was YES. [2023-08-30 21:54:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100186 conditions, 12346 events. 6801/12346 cut-off events. For 168552/168552 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 97075 event pairs, 947 based on Foata normal form. 124/12470 useless extension candidates. Maximal degree in co-relation 98895. Up to 5371 conditions per place. [2023-08-30 21:54:25,002 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 746 selfloop transitions, 464 changer transitions 0/1210 dead transitions. [2023-08-30 21:54:25,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1210 transitions, 24933 flow [2023-08-30 21:54:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 21:54:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 21:54:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2682 transitions. [2023-08-30 21:54:25,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-30 21:54:25,005 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2682 transitions. [2023-08-30 21:54:25,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2682 transitions. [2023-08-30 21:54:25,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:25,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2682 transitions. [2023-08-30 21:54:25,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.0) internal successors, (2682), 18 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:25,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:25,013 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:25,013 INFO L175 Difference]: Start difference. First operand has 228 places, 587 transitions, 11213 flow. Second operand 18 states and 2682 transitions. [2023-08-30 21:54:25,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1210 transitions, 24933 flow [2023-08-30 21:54:25,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1210 transitions, 23671 flow, removed 556 selfloop flow, removed 10 redundant places. [2023-08-30 21:54:25,576 INFO L231 Difference]: Finished difference. Result has 245 places, 867 transitions, 18298 flow [2023-08-30 21:54:25,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18298, PETRI_PLACES=245, PETRI_TRANSITIONS=867} [2023-08-30 21:54:25,576 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-08-30 21:54:25,576 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 867 transitions, 18298 flow [2023-08-30 21:54:25,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.06666666666666) internal successors, (2146), 15 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:25,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:25,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:25,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:25,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 21:54:25,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:25,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 436220956, now seen corresponding path program 14 times [2023-08-30 21:54:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819383649] [2023-08-30 21:54:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819383649] [2023-08-30 21:54:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819383649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146031129] [2023-08-30 21:54:26,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:54:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:26,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:26,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 21:54:26,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:54:26,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:54:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:28,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:28,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146031129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:28,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:28,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 21:54:28,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45248758] [2023-08-30 21:54:28,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:28,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:54:28,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:54:28,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:54:30,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:54:30,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:54:30,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 867 transitions, 18298 flow. Second operand has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:30,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:30,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:54:30,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:35,392 INFO L130 PetriNetUnfolder]: 6887/12757 cut-off events. [2023-08-30 21:54:35,392 INFO L131 PetriNetUnfolder]: For 257686/257686 co-relation queries the response was YES. [2023-08-30 21:54:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112354 conditions, 12757 events. 6887/12757 cut-off events. For 257686/257686 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 105984 event pairs, 1160 based on Foata normal form. 124/12881 useless extension candidates. Maximal degree in co-relation 110974. Up to 5565 conditions per place. [2023-08-30 21:54:35,523 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1068 selfloop transitions, 334 changer transitions 46/1448 dead transitions. [2023-08-30 21:54:35,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1448 transitions, 33445 flow [2023-08-30 21:54:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 21:54:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 21:54:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2347 transitions. [2023-08-30 21:54:35,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41320422535211265 [2023-08-30 21:54:35,526 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2347 transitions. [2023-08-30 21:54:35,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2347 transitions. [2023-08-30 21:54:35,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:35,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2347 transitions. [2023-08-30 21:54:35,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 146.6875) internal successors, (2347), 16 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:35,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:35,530 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:35,530 INFO L175 Difference]: Start difference. First operand has 245 places, 867 transitions, 18298 flow. Second operand 16 states and 2347 transitions. [2023-08-30 21:54:35,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1448 transitions, 33445 flow [2023-08-30 21:54:36,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1448 transitions, 31757 flow, removed 730 selfloop flow, removed 4 redundant places. [2023-08-30 21:54:36,730 INFO L231 Difference]: Finished difference. Result has 262 places, 1032 transitions, 21553 flow [2023-08-30 21:54:36,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=17101, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=21553, PETRI_PLACES=262, PETRI_TRANSITIONS=1032} [2023-08-30 21:54:36,732 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-08-30 21:54:36,732 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1032 transitions, 21553 flow [2023-08-30 21:54:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:36,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:36,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:36,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 21:54:36,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:36,938 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:36,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 15 times [2023-08-30 21:54:36,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:36,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198896465] [2023-08-30 21:54:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:36,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198896465] [2023-08-30 21:54:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198896465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:37,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875780134] [2023-08-30 21:54:37,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:54:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:37,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:37,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 21:54:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:54:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:37,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:54:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:37,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875780134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:37,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:37,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-30 21:54:37,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900103114] [2023-08-30 21:54:37,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:37,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:54:37,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:54:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:54:38,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:54:38,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1032 transitions, 21553 flow. Second operand has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:38,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:38,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:54:38,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:43,682 INFO L130 PetriNetUnfolder]: 6972/12886 cut-off events. [2023-08-30 21:54:43,682 INFO L131 PetriNetUnfolder]: For 256502/256502 co-relation queries the response was YES. [2023-08-30 21:54:43,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116730 conditions, 12886 events. 6972/12886 cut-off events. For 256502/256502 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 104970 event pairs, 3069 based on Foata normal form. 22/12908 useless extension candidates. Maximal degree in co-relation 115300. Up to 9680 conditions per place. [2023-08-30 21:54:43,803 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 796 selfloop transitions, 452 changer transitions 6/1254 dead transitions. [2023-08-30 21:54:43,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1254 transitions, 28157 flow [2023-08-30 21:54:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 21:54:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 21:54:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3677 transitions. [2023-08-30 21:54:43,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41430985915492957 [2023-08-30 21:54:43,807 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3677 transitions. [2023-08-30 21:54:43,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3677 transitions. [2023-08-30 21:54:43,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:43,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3677 transitions. [2023-08-30 21:54:43,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 147.08) internal successors, (3677), 25 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:43,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:43,818 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:43,818 INFO L175 Difference]: Start difference. First operand has 262 places, 1032 transitions, 21553 flow. Second operand 25 states and 3677 transitions. [2023-08-30 21:54:43,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1254 transitions, 28157 flow [2023-08-30 21:54:45,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1254 transitions, 27057 flow, removed 550 selfloop flow, removed 2 redundant places. [2023-08-30 21:54:45,379 INFO L231 Difference]: Finished difference. Result has 296 places, 1123 transitions, 23927 flow [2023-08-30 21:54:45,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=20627, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23927, PETRI_PLACES=296, PETRI_TRANSITIONS=1123} [2023-08-30 21:54:45,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 275 predicate places. [2023-08-30 21:54:45,380 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 1123 transitions, 23927 flow [2023-08-30 21:54:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:45,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:45,381 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:45,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:45,581 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:45,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2120764327, now seen corresponding path program 16 times [2023-08-30 21:54:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:45,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764708991] [2023-08-30 21:54:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:45,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:45,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764708991] [2023-08-30 21:54:45,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764708991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:45,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270428541] [2023-08-30 21:54:45,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:54:45,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:45,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:45,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:45,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 21:54:45,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:54:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:54:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:45,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270428541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:46,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 21:54:46,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639163168] [2023-08-30 21:54:46,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:54:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:54:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:54:46,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:54:46,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 1123 transitions, 23927 flow. Second operand has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:46,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:54:46,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:54:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:54:52,435 INFO L130 PetriNetUnfolder]: 7384/13595 cut-off events. [2023-08-30 21:54:52,436 INFO L131 PetriNetUnfolder]: For 306930/306930 co-relation queries the response was YES. [2023-08-30 21:54:52,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127759 conditions, 13595 events. 7384/13595 cut-off events. For 306930/306930 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 111237 event pairs, 953 based on Foata normal form. 124/13719 useless extension candidates. Maximal degree in co-relation 126326. Up to 5943 conditions per place. [2023-08-30 21:54:52,594 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 857 selfloop transitions, 719 changer transitions 3/1579 dead transitions. [2023-08-30 21:54:52,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1579 transitions, 34925 flow [2023-08-30 21:54:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 21:54:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 21:54:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3417 transitions. [2023-08-30 21:54:52,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184935701163503 [2023-08-30 21:54:52,597 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3417 transitions. [2023-08-30 21:54:52,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3417 transitions. [2023-08-30 21:54:52,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:54:52,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3417 transitions. [2023-08-30 21:54:52,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.56521739130434) internal successors, (3417), 23 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:52,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:52,608 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:52,608 INFO L175 Difference]: Start difference. First operand has 296 places, 1123 transitions, 23927 flow. Second operand 23 states and 3417 transitions. [2023-08-30 21:54:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1579 transitions, 34925 flow [2023-08-30 21:54:54,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1579 transitions, 33680 flow, removed 339 selfloop flow, removed 6 redundant places. [2023-08-30 21:54:54,851 INFO L231 Difference]: Finished difference. Result has 320 places, 1218 transitions, 26521 flow [2023-08-30 21:54:54,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=22695, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26521, PETRI_PLACES=320, PETRI_TRANSITIONS=1218} [2023-08-30 21:54:54,852 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-08-30 21:54:54,852 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1218 transitions, 26521 flow [2023-08-30 21:54:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:54:54,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:54:54,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:54:54,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 21:54:55,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:55,054 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:54:55,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:54:55,054 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 17 times [2023-08-30 21:54:55,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:54:55,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153875303] [2023-08-30 21:54:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:54:55,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:54:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:54:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:55,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:54:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153875303] [2023-08-30 21:54:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153875303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:54:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962950053] [2023-08-30 21:54:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:54:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:54:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:54:55,278 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:54:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 21:54:55,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:54:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:54:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:54:55,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:54:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:55,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:54:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:54:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962950053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:54:55,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:54:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 21:54:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248260040] [2023-08-30 21:54:55,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:54:55,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:54:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:54:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:54:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:54:58,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:55:00,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:55:03,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:55:03,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-08-30 21:55:03,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1218 transitions, 26521 flow. Second operand has 19 states, 19 states have (on average 139.78947368421052) internal successors, (2656), 19 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:03,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:03,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-08-30 21:55:03,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:11,980 INFO L130 PetriNetUnfolder]: 7833/15944 cut-off events. [2023-08-30 21:55:11,980 INFO L131 PetriNetUnfolder]: For 452978/452978 co-relation queries the response was YES. [2023-08-30 21:55:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156179 conditions, 15944 events. 7833/15944 cut-off events. For 452978/452978 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 151050 event pairs, 1358 based on Foata normal form. 54/15998 useless extension candidates. Maximal degree in co-relation 154176. Up to 6927 conditions per place. [2023-08-30 21:55:12,184 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1135 selfloop transitions, 770 changer transitions 11/1916 dead transitions. [2023-08-30 21:55:12,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1916 transitions, 46184 flow [2023-08-30 21:55:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 21:55:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 21:55:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5010 transitions. [2023-08-30 21:55:12,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40321931589537224 [2023-08-30 21:55:12,189 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5010 transitions. [2023-08-30 21:55:12,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5010 transitions. [2023-08-30 21:55:12,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:55:12,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5010 transitions. [2023-08-30 21:55:12,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 143.14285714285714) internal successors, (5010), 35 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:12,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:12,203 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:12,203 INFO L175 Difference]: Start difference. First operand has 320 places, 1218 transitions, 26521 flow. Second operand 35 states and 5010 transitions. [2023-08-30 21:55:12,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1916 transitions, 46184 flow [2023-08-30 21:55:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1916 transitions, 45110 flow, removed 385 selfloop flow, removed 5 redundant places. [2023-08-30 21:55:16,157 INFO L231 Difference]: Finished difference. Result has 352 places, 1535 transitions, 35860 flow [2023-08-30 21:55:16,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=25164, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=35860, PETRI_PLACES=352, PETRI_TRANSITIONS=1535} [2023-08-30 21:55:16,158 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2023-08-30 21:55:16,158 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1535 transitions, 35860 flow [2023-08-30 21:55:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.78947368421052) internal successors, (2656), 19 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:16,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:55:16,159 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:55:16,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 21:55:16,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 21:55:16,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:55:16,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:55:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash 271090373, now seen corresponding path program 18 times [2023-08-30 21:55:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:55:16,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025793323] [2023-08-30 21:55:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:55:16,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:55:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:55:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:55:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025793323] [2023-08-30 21:55:16,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025793323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:55:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465060229] [2023-08-30 21:55:16,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:55:16,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:55:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:55:16,486 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:55:16,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 21:55:16,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:55:16,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:55:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:55:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:55:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:55:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:55:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465060229] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:55:16,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:55:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 21:55:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334414208] [2023-08-30 21:55:16,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:55:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 21:55:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:55:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 21:55:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-30 21:55:17,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:55:17,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1535 transitions, 35860 flow. Second operand has 17 states, 17 states have (on average 142.76470588235293) internal successors, (2427), 17 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:55:17,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:55:17,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:55:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:55:27,269 WARN L222 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 49 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:55:39,201 WARN L222 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 50 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:55:53,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:55:55,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:06,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:08,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:22,669 WARN L222 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 45 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 21:56:24,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:26,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:28,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:45,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:48,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:56:55,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:01,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:04,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:09,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:24,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:25,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:28,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:30,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:32,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:36,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:42,129 INFO L130 PetriNetUnfolder]: 8018/16219 cut-off events. [2023-08-30 21:57:42,129 INFO L131 PetriNetUnfolder]: For 518519/518519 co-relation queries the response was YES. [2023-08-30 21:57:42,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164953 conditions, 16219 events. 8018/16219 cut-off events. For 518519/518519 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 151027 event pairs, 1481 based on Foata normal form. 105/16324 useless extension candidates. Maximal degree in co-relation 163035. Up to 6967 conditions per place. [2023-08-30 21:57:42,309 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 909 selfloop transitions, 1139 changer transitions 6/2054 dead transitions. [2023-08-30 21:57:42,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 2054 transitions, 48823 flow [2023-08-30 21:57:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-30 21:57:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-30 21:57:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 6630 transitions. [2023-08-30 21:57:42,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41502347417840374 [2023-08-30 21:57:42,316 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 6630 transitions. [2023-08-30 21:57:42,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 6630 transitions. [2023-08-30 21:57:42,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:57:42,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 6630 transitions. [2023-08-30 21:57:42,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 147.33333333333334) internal successors, (6630), 45 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:42,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 355.0) internal successors, (16330), 46 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:42,332 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 355.0) internal successors, (16330), 46 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:42,332 INFO L175 Difference]: Start difference. First operand has 352 places, 1535 transitions, 35860 flow. Second operand 45 states and 6630 transitions. [2023-08-30 21:57:42,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 2054 transitions, 48823 flow [2023-08-30 21:57:46,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 2054 transitions, 47425 flow, removed 334 selfloop flow, removed 16 redundant places. [2023-08-30 21:57:46,653 INFO L231 Difference]: Finished difference. Result has 385 places, 1630 transitions, 39266 flow [2023-08-30 21:57:46,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=34607, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=39266, PETRI_PLACES=385, PETRI_TRANSITIONS=1630} [2023-08-30 21:57:46,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 364 predicate places. [2023-08-30 21:57:46,654 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1630 transitions, 39266 flow [2023-08-30 21:57:46,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 142.76470588235293) internal successors, (2427), 17 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:46,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:57:46,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:57:46,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 21:57:46,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 21:57:46,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:57:46,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:57:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2023740468, now seen corresponding path program 19 times [2023-08-30 21:57:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:57:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594070296] [2023-08-30 21:57:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:57:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:57:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:57:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:57:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594070296] [2023-08-30 21:57:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594070296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:57:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872347613] [2023-08-30 21:57:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:57:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:57:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:57:47,059 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:57:47,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 21:57:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:57:47,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:57:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:57:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:47,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:57:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:57:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872347613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:57:47,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:57:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 21:57:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200455913] [2023-08-30 21:57:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:57:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:57:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:57:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:57:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:57:47,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:57:47,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1630 transitions, 39266 flow. Second operand has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:57:47,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:57:47,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:57:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:57:56,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:57:59,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:58:06,751 INFO L130 PetriNetUnfolder]: 8681/17598 cut-off events. [2023-08-30 21:58:06,751 INFO L131 PetriNetUnfolder]: For 661705/661705 co-relation queries the response was YES. [2023-08-30 21:58:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185779 conditions, 17598 events. 8681/17598 cut-off events. For 661705/661705 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 167041 event pairs, 3931 based on Foata normal form. 42/17640 useless extension candidates. Maximal degree in co-relation 183850. Up to 15394 conditions per place. [2023-08-30 21:58:06,982 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1520 selfloop transitions, 448 changer transitions 3/1971 dead transitions. [2023-08-30 21:58:06,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1971 transitions, 51036 flow [2023-08-30 21:58:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 21:58:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 21:58:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4703 transitions. [2023-08-30 21:58:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139964788732394 [2023-08-30 21:58:06,986 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4703 transitions. [2023-08-30 21:58:06,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4703 transitions. [2023-08-30 21:58:06,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:06,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4703 transitions. [2023-08-30 21:58:06,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 146.96875) internal successors, (4703), 32 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:06,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:06,999 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:06,999 INFO L175 Difference]: Start difference. First operand has 385 places, 1630 transitions, 39266 flow. Second operand 32 states and 4703 transitions. [2023-08-30 21:58:06,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1971 transitions, 51036 flow [2023-08-30 21:58:11,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1971 transitions, 47800 flow, removed 398 selfloop flow, removed 29 redundant places. [2023-08-30 21:58:11,401 INFO L231 Difference]: Finished difference. Result has 410 places, 1826 transitions, 43038 flow [2023-08-30 21:58:11,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=36315, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=43038, PETRI_PLACES=410, PETRI_TRANSITIONS=1826} [2023-08-30 21:58:11,403 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 389 predicate places. [2023-08-30 21:58:11,403 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1826 transitions, 43038 flow [2023-08-30 21:58:11,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:11,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:58:11,404 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:58:11,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 21:58:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 21:58:11,613 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:58:11,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:58:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1131740359, now seen corresponding path program 20 times [2023-08-30 21:58:11,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:58:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633408087] [2023-08-30 21:58:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:58:11,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:58:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:58:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:58:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633408087] [2023-08-30 21:58:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633408087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:58:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231627227] [2023-08-30 21:58:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:58:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:58:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:58:11,758 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:58:11,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 21:58:11,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:58:11,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:58:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:58:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:58:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:11,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:58:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:58:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231627227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:58:12,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:58:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-30 21:58:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700474032] [2023-08-30 21:58:12,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:58:12,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:58:12,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:58:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:58:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:58:12,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:58:12,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1826 transitions, 43038 flow. Second operand has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:12,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:58:12,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:58:12,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:58:19,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:58:40,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:58:45,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:58:55,179 INFO L130 PetriNetUnfolder]: 9198/18553 cut-off events. [2023-08-30 21:58:55,180 INFO L131 PetriNetUnfolder]: For 892424/892424 co-relation queries the response was YES. [2023-08-30 21:58:55,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207649 conditions, 18553 events. 9198/18553 cut-off events. For 892424/892424 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 176935 event pairs, 2642 based on Foata normal form. 111/18664 useless extension candidates. Maximal degree in co-relation 205670. Up to 7913 conditions per place. [2023-08-30 21:58:55,441 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1211 selfloop transitions, 1046 changer transitions 6/2263 dead transitions. [2023-08-30 21:58:55,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 2263 transitions, 56220 flow [2023-08-30 21:58:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 21:58:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 21:58:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4288 transitions. [2023-08-30 21:58:55,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165128703254007 [2023-08-30 21:58:55,445 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4288 transitions. [2023-08-30 21:58:55,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4288 transitions. [2023-08-30 21:58:55,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:58:55,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4288 transitions. [2023-08-30 21:58:55,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 147.86206896551724) internal successors, (4288), 29 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:55,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:55,454 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:58:55,454 INFO L175 Difference]: Start difference. First operand has 410 places, 1826 transitions, 43038 flow. Second operand 29 states and 4288 transitions. [2023-08-30 21:58:55,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 2263 transitions, 56220 flow [2023-08-30 21:59:02,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2263 transitions, 54561 flow, removed 757 selfloop flow, removed 8 redundant places. [2023-08-30 21:59:02,127 INFO L231 Difference]: Finished difference. Result has 444 places, 1935 transitions, 47133 flow [2023-08-30 21:59:02,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=41447, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=940, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=47133, PETRI_PLACES=444, PETRI_TRANSITIONS=1935} [2023-08-30 21:59:02,129 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 423 predicate places. [2023-08-30 21:59:02,130 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1935 transitions, 47133 flow [2023-08-30 21:59:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:02,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:02,130 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:02,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 21:59:02,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:02,336 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:02,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1285537098, now seen corresponding path program 21 times [2023-08-30 21:59:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300357437] [2023-08-30 21:59:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300357437] [2023-08-30 21:59:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300357437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488423369] [2023-08-30 21:59:02,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:59:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:02,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:59:02,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 21:59:02,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:59:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:59:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:02,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:03,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488423369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:03,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:03,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-30 21:59:03,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518419031] [2023-08-30 21:59:03,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:03,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:59:03,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:59:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:59:05,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:59:07,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:59:09,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:59:10,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 355 [2023-08-30 21:59:10,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1935 transitions, 47133 flow. Second operand has 18 states, 18 states have (on average 141.83333333333334) internal successors, (2553), 18 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:10,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:10,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 355 [2023-08-30 21:59:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:59:14,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-30 21:59:21,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 21:59:33,411 INFO L130 PetriNetUnfolder]: 9160/18783 cut-off events. [2023-08-30 21:59:33,411 INFO L131 PetriNetUnfolder]: For 1063141/1063141 co-relation queries the response was YES. [2023-08-30 21:59:33,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223401 conditions, 18783 events. 9160/18783 cut-off events. For 1063141/1063141 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 184093 event pairs, 1809 based on Foata normal form. 88/18871 useless extension candidates. Maximal degree in co-relation 220805. Up to 8649 conditions per place. [2023-08-30 21:59:33,734 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1520 selfloop transitions, 775 changer transitions 16/2311 dead transitions. [2023-08-30 21:59:33,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2311 transitions, 61295 flow [2023-08-30 21:59:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 21:59:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 21:59:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6362 transitions. [2023-08-30 21:59:33,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40729833546734956 [2023-08-30 21:59:33,738 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6362 transitions. [2023-08-30 21:59:33,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6362 transitions. [2023-08-30 21:59:33,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:59:33,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6362 transitions. [2023-08-30 21:59:33,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 144.5909090909091) internal successors, (6362), 44 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:33,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 355.0) internal successors, (15975), 45 states have internal predecessors, (15975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:33,751 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 355.0) internal successors, (15975), 45 states have internal predecessors, (15975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:33,751 INFO L175 Difference]: Start difference. First operand has 444 places, 1935 transitions, 47133 flow. Second operand 44 states and 6362 transitions. [2023-08-30 21:59:33,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2311 transitions, 61295 flow [2023-08-30 21:59:41,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 2311 transitions, 60013 flow, removed 404 selfloop flow, removed 9 redundant places. [2023-08-30 21:59:41,260 INFO L231 Difference]: Finished difference. Result has 482 places, 1947 transitions, 48118 flow [2023-08-30 21:59:41,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=45303, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=48118, PETRI_PLACES=482, PETRI_TRANSITIONS=1947} [2023-08-30 21:59:41,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 461 predicate places. [2023-08-30 21:59:41,262 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1947 transitions, 48118 flow [2023-08-30 21:59:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 141.83333333333334) internal successors, (2553), 18 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:41,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:59:41,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:59:41,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 21:59:41,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:41,463 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:59:41,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:59:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 535537283, now seen corresponding path program 22 times [2023-08-30 21:59:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:59:41,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223215492] [2023-08-30 21:59:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:59:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:59:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:59:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:59:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223215492] [2023-08-30 21:59:41,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223215492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:59:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295979300] [2023-08-30 21:59:41,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:59:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:59:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:59:41,633 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:59:41,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 21:59:41,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:59:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:59:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 21:59:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:59:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:59:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 21:59:42,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295979300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:59:42,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:59:42,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 21:59:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452133830] [2023-08-30 21:59:42,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:59:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:59:42,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:59:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:59:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:59:42,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 21:59:42,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1947 transitions, 48118 flow. Second operand has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:59:42,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:59:42,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 21:59:42,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:00:22,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:00:44,978 INFO L130 PetriNetUnfolder]: 9509/19363 cut-off events. [2023-08-30 22:00:44,978 INFO L131 PetriNetUnfolder]: For 1265930/1265930 co-relation queries the response was YES. [2023-08-30 22:00:45,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242287 conditions, 19363 events. 9509/19363 cut-off events. For 1265930/1265930 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 188106 event pairs, 2498 based on Foata normal form. 105/19468 useless extension candidates. Maximal degree in co-relation 239595. Up to 8197 conditions per place. [2023-08-30 22:00:45,317 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1178 selfloop transitions, 1232 changer transitions 9/2419 dead transitions. [2023-08-30 22:00:45,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2419 transitions, 62356 flow [2023-08-30 22:00:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 22:00:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 22:00:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6187 transitions. [2023-08-30 22:00:45,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149564050972502 [2023-08-30 22:00:45,321 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6187 transitions. [2023-08-30 22:00:45,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6187 transitions. [2023-08-30 22:00:45,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:00:45,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6187 transitions. [2023-08-30 22:00:45,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 147.3095238095238) internal successors, (6187), 42 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:45,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:45,333 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:45,334 INFO L175 Difference]: Start difference. First operand has 482 places, 1947 transitions, 48118 flow. Second operand 42 states and 6187 transitions. [2023-08-30 22:00:45,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2419 transitions, 62356 flow [2023-08-30 22:00:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2419 transitions, 60852 flow, removed 637 selfloop flow, removed 13 redundant places. [2023-08-30 22:00:54,789 INFO L231 Difference]: Finished difference. Result has 517 places, 2037 transitions, 52476 flow [2023-08-30 22:00:54,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46780, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=52476, PETRI_PLACES=517, PETRI_TRANSITIONS=2037} [2023-08-30 22:00:54,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 496 predicate places. [2023-08-30 22:00:54,792 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 2037 transitions, 52476 flow [2023-08-30 22:00:54,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:54,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:00:54,793 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:00:54,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 22:00:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 22:00:55,000 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:00:55,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:00:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -388141745, now seen corresponding path program 23 times [2023-08-30 22:00:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:00:55,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453290668] [2023-08-30 22:00:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:00:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:00:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:00:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:00:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453290668] [2023-08-30 22:00:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453290668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:00:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105295817] [2023-08-30 22:00:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 22:00:55,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:00:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:00:55,166 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:00:55,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 22:00:55,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 22:00:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:00:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:00:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:00:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:55,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:00:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:00:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105295817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:00:55,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:00:55,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 22:00:55,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070278538] [2023-08-30 22:00:55,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:00:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 22:00:55,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:00:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 22:00:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-08-30 22:00:56,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 22:00:56,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 2037 transitions, 52476 flow. Second operand has 19 states, 19 states have (on average 142.89473684210526) internal successors, (2715), 19 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:00:56,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:00:56,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 22:00:56,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:01:03,655 WARN L222 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 43 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:01:16,428 WARN L222 SmtUtils]: Spent 11.81s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 22:01:21,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:01:27,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:01:57,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:01:59,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:02:04,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:02:17,191 INFO L130 PetriNetUnfolder]: 9778/19877 cut-off events. [2023-08-30 22:02:17,191 INFO L131 PetriNetUnfolder]: For 1457167/1457167 co-relation queries the response was YES. [2023-08-30 22:02:17,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257552 conditions, 19877 events. 9778/19877 cut-off events. For 1457167/1457167 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 194019 event pairs, 2542 based on Foata normal form. 66/19943 useless extension candidates. Maximal degree in co-relation 255450. Up to 8357 conditions per place. [2023-08-30 22:02:17,584 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1128 selfloop transitions, 1262 changer transitions 9/2399 dead transitions. [2023-08-30 22:02:17,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2399 transitions, 64341 flow [2023-08-30 22:02:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 22:02:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 22:02:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5593 transitions. [2023-08-30 22:02:17,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41460340993328393 [2023-08-30 22:02:17,588 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5593 transitions. [2023-08-30 22:02:17,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5593 transitions. [2023-08-30 22:02:17,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:02:17,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5593 transitions. [2023-08-30 22:02:17,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 147.18421052631578) internal successors, (5593), 38 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:17,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:17,599 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:17,599 INFO L175 Difference]: Start difference. First operand has 517 places, 2037 transitions, 52476 flow. Second operand 38 states and 5593 transitions. [2023-08-30 22:02:17,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2399 transitions, 64341 flow [2023-08-30 22:02:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2399 transitions, 62689 flow, removed 214 selfloop flow, removed 28 redundant places. [2023-08-30 22:02:26,096 INFO L231 Difference]: Finished difference. Result has 531 places, 2082 transitions, 55463 flow [2023-08-30 22:02:26,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=50599, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=55463, PETRI_PLACES=531, PETRI_TRANSITIONS=2082} [2023-08-30 22:02:26,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 510 predicate places. [2023-08-30 22:02:26,099 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2082 transitions, 55463 flow [2023-08-30 22:02:26,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.89473684210526) internal successors, (2715), 19 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:26,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:02:26,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:02:26,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 22:02:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 22:02:26,300 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:02:26,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:02:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1545092662, now seen corresponding path program 24 times [2023-08-30 22:02:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:02:26,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848555482] [2023-08-30 22:02:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:02:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:02:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:02:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:26,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:02:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848555482] [2023-08-30 22:02:26,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848555482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:02:26,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973870490] [2023-08-30 22:02:26,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 22:02:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:02:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:02:26,416 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:02:26,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 22:02:26,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 22:02:26,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 22:02:26,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:02:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:02:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:02:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:26,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973870490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:02:26,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:02:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 22:02:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831421066] [2023-08-30 22:02:26,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:02:26,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 22:02:26,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:02:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 22:02:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-30 22:02:27,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 22:02:27,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2082 transitions, 55463 flow. Second operand has 17 states, 17 states have (on average 142.8235294117647) internal successors, (2428), 17 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:27,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:02:27,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 22:02:27,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:02:43,522 INFO L130 PetriNetUnfolder]: 9831/19940 cut-off events. [2023-08-30 22:02:43,522 INFO L131 PetriNetUnfolder]: For 1620540/1620540 co-relation queries the response was YES. [2023-08-30 22:02:43,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267121 conditions, 19940 events. 9831/19940 cut-off events. For 1620540/1620540 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 194063 event pairs, 4581 based on Foata normal form. 36/19976 useless extension candidates. Maximal degree in co-relation 264343. Up to 18662 conditions per place. [2023-08-30 22:02:43,877 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1806 selfloop transitions, 393 changer transitions 0/2199 dead transitions. [2023-08-30 22:02:43,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2199 transitions, 63062 flow [2023-08-30 22:02:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 22:02:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 22:02:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5083 transitions. [2023-08-30 22:02:43,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40909456740442657 [2023-08-30 22:02:43,881 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5083 transitions. [2023-08-30 22:02:43,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5083 transitions. [2023-08-30 22:02:43,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:02:43,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5083 transitions. [2023-08-30 22:02:43,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 145.22857142857143) internal successors, (5083), 35 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:43,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:43,889 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:43,889 INFO L175 Difference]: Start difference. First operand has 531 places, 2082 transitions, 55463 flow. Second operand 35 states and 5083 transitions. [2023-08-30 22:02:43,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2199 transitions, 63062 flow [2023-08-30 22:02:53,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 2199 transitions, 61840 flow, removed 172 selfloop flow, removed 25 redundant places. [2023-08-30 22:02:53,303 INFO L231 Difference]: Finished difference. Result has 549 places, 2117 transitions, 56368 flow [2023-08-30 22:02:53,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=54175, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=56368, PETRI_PLACES=549, PETRI_TRANSITIONS=2117} [2023-08-30 22:02:53,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 528 predicate places. [2023-08-30 22:02:53,305 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 2117 transitions, 56368 flow [2023-08-30 22:02:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 142.8235294117647) internal successors, (2428), 17 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:53,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:02:53,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:02:53,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 22:02:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:02:53,506 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 22:02:53,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:02:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -525705484, now seen corresponding path program 25 times [2023-08-30 22:02:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:02:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773932709] [2023-08-30 22:02:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:02:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:02:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:02:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:53,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:02:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773932709] [2023-08-30 22:02:53,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773932709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 22:02:53,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567754703] [2023-08-30 22:02:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 22:02:53,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 22:02:53,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:02:53,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 22:02:53,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 22:02:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:02:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 22:02:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 22:02:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:53,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 22:02:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 22:02:54,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567754703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 22:02:54,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 22:02:54,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-30 22:02:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760202920] [2023-08-30 22:02:54,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 22:02:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 22:02:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:02:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 22:02:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-08-30 22:02:54,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-30 22:02:54,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 2117 transitions, 56368 flow. Second operand has 19 states, 19 states have (on average 142.78947368421052) internal successors, (2713), 19 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:02:54,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:02:54,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-30 22:02:54,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:02:58,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:03:06,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:03:17,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 22:03:24,482 INFO L130 PetriNetUnfolder]: 10303/20946 cut-off events. [2023-08-30 22:03:24,483 INFO L131 PetriNetUnfolder]: For 1850534/1850534 co-relation queries the response was YES. [2023-08-30 22:03:24,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287332 conditions, 20946 events. 10303/20946 cut-off events. For 1850534/1850534 co-relation queries the response was YES. Maximal size of possible extension queue 1405. Compared 206067 event pairs, 4747 based on Foata normal form. 54/21000 useless extension candidates. Maximal degree in co-relation 284452. Up to 19154 conditions per place. [2023-08-30 22:03:24,857 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1985 selfloop transitions, 406 changer transitions 4/2395 dead transitions. [2023-08-30 22:03:24,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 2395 transitions, 69729 flow [2023-08-30 22:03:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 22:03:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 22:03:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5837 transitions. [2023-08-30 22:03:24,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411056338028169 [2023-08-30 22:03:24,861 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5837 transitions. [2023-08-30 22:03:24,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5837 transitions. [2023-08-30 22:03:24,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:03:24,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5837 transitions. [2023-08-30 22:03:24,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 145.925) internal successors, (5837), 40 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:03:24,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:03:24,872 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 22:03:24,872 INFO L175 Difference]: Start difference. First operand has 549 places, 2117 transitions, 56368 flow. Second operand 40 states and 5837 transitions. [2023-08-30 22:03:24,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 2395 transitions, 69729 flow Killed by 15