./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --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 18:46:54,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:46:54,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:46:54,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:46:54,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:46:54,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:46:54,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:46:54,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:46:54,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:46:54,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:46:54,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:46:54,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:46:54,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:46:54,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:46:54,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:46:54,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:46:54,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:46:54,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:46:54,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:46:54,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:46:54,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:46:54,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:46:54,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:46:54,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:46:54,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:46:54,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:46:54,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:46:54,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:46:54,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:46:54,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:46:54,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:46:54,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:46:54,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:46:54,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:46:54,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:46:54,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:46:54,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:46:54,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:46:54,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:46:54,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:46:54,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:46:54,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:46:54,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:46:54,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:46:54,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:46:54,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:46:54,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:46:54,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:46:54,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:46:54,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:46:54,659 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:46:54,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:46:54,659 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:46:54,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:46:54,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:46:54,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:46:54,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:46:54,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:46:54,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:46:54,661 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:46:54,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:46:54,661 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:46:54,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:46:54,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:46:54,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:46:54,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:46:54,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:46:54,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:46:54,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:46:54,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:46:54,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:46:54,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:46:54,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:46:54,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:46:54,664 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:46:54,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:46:54,665 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:46:54,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:46:54,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:46:54,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:46:55,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:46:55,002 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:46:55,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:46:55,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-30 18:46:56,253 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:46:56,456 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:46:56,456 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-08-30 18:46:56,468 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78ed40c9/203d99715b484b89b74ce958c61b12f8/FLAG46017f9c6 [2023-08-30 18:46:56,482 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78ed40c9/203d99715b484b89b74ce958c61b12f8 [2023-08-30 18:46:56,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:46:56,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:46:56,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:46:56,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:46:56,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:46:56,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dda429e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56, skipping insertion in model container [2023-08-30 18:46:56,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:46:56,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:46:56,666 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-30 18:46:56,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:46:56,684 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:46:56,705 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2023-08-30 18:46:56,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:46:56,722 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:46:56,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56 WrapperNode [2023-08-30 18:46:56,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:46:56,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:46:56,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:46:56,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:46:56,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,786 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 281 [2023-08-30 18:46:56,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:46:56,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:46:56,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:46:56,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:46:56,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:46:56,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:46:56,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:46:56,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:46:56,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (1/1) ... [2023-08-30 18:46:56,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:46:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:46:56,890 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 18:46:56,918 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 18:46:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:46:56,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:46:56,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:46:56,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:46:56,935 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 18:46:56,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 18:46:56,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 18:46:56,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 18:46:56,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 18:46:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 18:46:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:46:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:46:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:46:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:46:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:46:56,942 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 18:46:57,081 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:46:57,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:46:57,536 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:46:57,546 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:46:57,547 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 18:46:57,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:46:57 BoogieIcfgContainer [2023-08-30 18:46:57,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:46:57,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:46:57,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:46:57,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:46:57,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:46:56" (1/3) ... [2023-08-30 18:46:57,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd480a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:46:57, skipping insertion in model container [2023-08-30 18:46:57,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:46:56" (2/3) ... [2023-08-30 18:46:57,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd480a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:46:57, skipping insertion in model container [2023-08-30 18:46:57,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:46:57" (3/3) ... [2023-08-30 18:46:57,561 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2023-08-30 18:46:57,569 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:46:57,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:46:57,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:46:57,576 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:46:57,729 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 18:46:57,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 324 transitions, 672 flow [2023-08-30 18:46:57,906 INFO L130 PetriNetUnfolder]: 29/321 cut-off events. [2023-08-30 18:46:57,907 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:46:57,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 29/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 494 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-30 18:46:57,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 324 transitions, 672 flow [2023-08-30 18:46:57,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 311 transitions, 640 flow [2023-08-30 18:46:57,930 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:46:57,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 311 transitions, 640 flow [2023-08-30 18:46:57,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 311 transitions, 640 flow [2023-08-30 18:46:57,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 311 transitions, 640 flow [2023-08-30 18:46:58,001 INFO L130 PetriNetUnfolder]: 29/311 cut-off events. [2023-08-30 18:46:58,001 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:46:58,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 311 events. 29/311 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 493 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-08-30 18:46:58,017 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-08-30 18:47:05,794 INFO L134 LiptonReduction]: Checked pairs total: 14156 [2023-08-30 18:47:05,794 INFO L136 LiptonReduction]: Total number of compositions: 352 [2023-08-30 18:47:05,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:47:05,812 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;@7da5b5af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:47:05,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:47:05,819 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-08-30 18:47:05,819 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 18:47:05,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:05,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:05,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:05,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash -266383442, now seen corresponding path program 1 times [2023-08-30 18:47:05,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700600319] [2023-08-30 18:47:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:06,301 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 18:47:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700600319] [2023-08-30 18:47:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700600319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:06,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:47:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:47:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365023888] [2023-08-30 18:47:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:47:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:47:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:47:06,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-08-30 18:47:06,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:06,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-08-30 18:47:06,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:06,568 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-08-30 18:47:06,569 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-08-30 18:47:06,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-08-30 18:47:06,573 INFO L137 encePairwiseOnDemand]: 668/676 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-08-30 18:47:06,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-08-30 18:47:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:47:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:47:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-08-30 18:47:06,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354043392504931 [2023-08-30 18:47:06,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-08-30 18:47:06,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-08-30 18:47:06,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:06,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-08-30 18:47:06,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,642 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 883 transitions. [2023-08-30 18:47:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-08-30 18:47:06,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 18:47:06,648 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-08-30 18:47:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-30 18:47:06,653 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-30 18:47:06,654 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-08-30 18:47:06,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:06,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:47:06,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:06,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -820998595, now seen corresponding path program 1 times [2023-08-30 18:47:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:06,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3596119] [2023-08-30 18:47:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:47:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3596119] [2023-08-30 18:47:06,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3596119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:06,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:47:06,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 18:47:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399154756] [2023-08-30 18:47:06,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 18:47:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 18:47:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 18:47:06,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 676 [2023-08-30 18:47:06,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:06,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:06,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 676 [2023-08-30 18:47:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:07,094 INFO L130 PetriNetUnfolder]: 658/966 cut-off events. [2023-08-30 18:47:07,095 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:47:07,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 966 events. 658/966 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3451 event pairs, 253 based on Foata normal form. 1/754 useless extension candidates. Maximal degree in co-relation 1954. Up to 546 conditions per place. [2023-08-30 18:47:07,100 INFO L137 encePairwiseOnDemand]: 673/676 looper letters, 45 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-08-30 18:47:07,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 249 flow [2023-08-30 18:47:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:47:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:47:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2023-08-30 18:47:07,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2023-08-30 18:47:07,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2023-08-30 18:47:07,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2023-08-30 18:47:07,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:07,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2023-08-30 18:47:07,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,113 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 3 states and 915 transitions. [2023-08-30 18:47:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 249 flow [2023-08-30 18:47:07,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:47:07,115 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 104 flow [2023-08-30 18:47:07,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2023-08-30 18:47:07,116 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-08-30 18:47:07,116 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 104 flow [2023-08-30 18:47:07,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:07,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 18:47:07,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:07,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1628203704, now seen corresponding path program 1 times [2023-08-30 18:47:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:07,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016890564] [2023-08-30 18:47:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:47:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016890564] [2023-08-30 18:47:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016890564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:07,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026685033] [2023-08-30 18:47:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:07,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:07,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:07,307 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 18:47:07,333 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 18:47:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 18:47:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:47:07,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 18:47:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026685033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:47:07,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:47:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-30 18:47:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255404409] [2023-08-30 18:47:07,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:47:07,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 18:47:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 18:47:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:07,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 676 [2023-08-30 18:47:07,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 280.375) internal successors, (2243), 8 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:07,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 676 [2023-08-30 18:47:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:07,856 INFO L130 PetriNetUnfolder]: 658/975 cut-off events. [2023-08-30 18:47:07,856 INFO L131 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2023-08-30 18:47:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 975 events. 658/975 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 2085. Up to 964 conditions per place. [2023-08-30 18:47:07,860 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 15 changer transitions 0/43 dead transitions. [2023-08-30 18:47:07,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 226 flow [2023-08-30 18:47:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:47:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:47:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1707 transitions. [2023-08-30 18:47:07,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208579881656805 [2023-08-30 18:47:07,866 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1707 transitions. [2023-08-30 18:47:07,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1707 transitions. [2023-08-30 18:47:07,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:07,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1707 transitions. [2023-08-30 18:47:07,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.5) internal successors, (1707), 6 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,879 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 104 flow. Second operand 6 states and 1707 transitions. [2023-08-30 18:47:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 226 flow [2023-08-30 18:47:07,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:47:07,881 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 198 flow [2023-08-30 18:47:07,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-08-30 18:47:07,882 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-30 18:47:07,882 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 198 flow [2023-08-30 18:47:07,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 280.375) internal successors, (2243), 8 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:07,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:07,884 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:07,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 18:47:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:08,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:08,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1306613477, now seen corresponding path program 2 times [2023-08-30 18:47:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24872235] [2023-08-30 18:47:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 18:47:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24872235] [2023-08-30 18:47:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24872235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924314542] [2023-08-30 18:47:08,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:47:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:08,314 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 18:47:08,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:47:08,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:47:08,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 18:47:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 18:47:08,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-30 18:47:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924314542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:47:08,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:47:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-30 18:47:08,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258369718] [2023-08-30 18:47:08,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:47:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 18:47:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 18:47:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-30 18:47:09,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 676 [2023-08-30 18:47:09,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 198 flow. Second operand has 17 states, 17 states have (on average 278.5882352941176) internal successors, (4736), 17 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:09,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:09,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 676 [2023-08-30 18:47:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:09,265 INFO L130 PetriNetUnfolder]: 658/978 cut-off events. [2023-08-30 18:47:09,265 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 18:47:09,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 978 events. 658/978 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 1/765 useless extension candidates. Maximal degree in co-relation 2057. Up to 964 conditions per place. [2023-08-30 18:47:09,269 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 18 changer transitions 0/46 dead transitions. [2023-08-30 18:47:09,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 308 flow [2023-08-30 18:47:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 18:47:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 18:47:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1980 transitions. [2023-08-30 18:47:09,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184277261200338 [2023-08-30 18:47:09,275 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1980 transitions. [2023-08-30 18:47:09,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1980 transitions. [2023-08-30 18:47:09,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:09,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1980 transitions. [2023-08-30 18:47:09,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 282.85714285714283) internal successors, (1980), 7 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:09,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:09,290 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:09,290 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 198 flow. Second operand 7 states and 1980 transitions. [2023-08-30 18:47:09,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 308 flow [2023-08-30 18:47:09,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 284 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 18:47:09,295 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 242 flow [2023-08-30 18:47:09,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-30 18:47:09,297 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-30 18:47:09,297 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 242 flow [2023-08-30 18:47:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 278.5882352941176) internal successors, (4736), 17 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:09,300 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:09,312 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 18:47:09,505 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,SelfDestructingSolverStorable3 [2023-08-30 18:47:09,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:09,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash 8528152, now seen corresponding path program 3 times [2023-08-30 18:47:09,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:09,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183568360] [2023-08-30 18:47:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:09,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183568360] [2023-08-30 18:47:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183568360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043226418] [2023-08-30 18:47:09,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:47:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:09,924 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 18:47:09,927 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 18:47:10,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:47:10,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:47:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:10,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:10,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043226418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:10,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623991089] [2023-08-30 18:47:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:10,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:47:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:47:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:47:10,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-08-30 18:47:10,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:10,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:10,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-08-30 18:47:10,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:10,731 INFO L130 PetriNetUnfolder]: 1407/2064 cut-off events. [2023-08-30 18:47:10,732 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-30 18:47:10,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 2064 events. 1407/2064 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8510 event pairs, 477 based on Foata normal form. 1/1561 useless extension candidates. Maximal degree in co-relation 4365. Up to 1015 conditions per place. [2023-08-30 18:47:10,740 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-08-30 18:47:10,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 499 flow [2023-08-30 18:47:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:47:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:47:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-08-30 18:47:10,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441198224852071 [2023-08-30 18:47:10,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-08-30 18:47:10,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-08-30 18:47:10,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:10,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-08-30 18:47:10,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:10,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:10,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:10,751 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 242 flow. Second operand 4 states and 1193 transitions. [2023-08-30 18:47:10,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 499 flow [2023-08-30 18:47:10,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 463 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 18:47:10,754 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 239 flow [2023-08-30 18:47:10,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-08-30 18:47:10,755 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-08-30 18:47:10,755 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 239 flow [2023-08-30 18:47:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:10,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:10,756 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:10,767 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 18:47:10,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:10,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:10,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2105961796, now seen corresponding path program 4 times [2023-08-30 18:47:10,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861368845] [2023-08-30 18:47:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:10,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861368845] [2023-08-30 18:47:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861368845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:11,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742488737] [2023-08-30 18:47:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:47:11,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:11,353 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 18:47:11,356 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 18:47:11,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:47:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 18:47:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:11,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742488737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:11,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647776567] [2023-08-30 18:47:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:11,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 18:47:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 18:47:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-30 18:47:11,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-08-30 18:47:11,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:11,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:11,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-08-30 18:47:11,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:12,079 INFO L130 PetriNetUnfolder]: 2025/2955 cut-off events. [2023-08-30 18:47:12,079 INFO L131 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2023-08-30 18:47:12,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 2955 events. 2025/2955 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12771 event pairs, 820 based on Foata normal form. 1/2516 useless extension candidates. Maximal degree in co-relation 7299. Up to 1739 conditions per place. [2023-08-30 18:47:12,093 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-08-30 18:47:12,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 509 flow [2023-08-30 18:47:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:47:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:47:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-08-30 18:47:12,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404585798816568 [2023-08-30 18:47:12,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-08-30 18:47:12,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-08-30 18:47:12,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:12,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-08-30 18:47:12,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:12,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:12,104 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:12,104 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 239 flow. Second operand 4 states and 1191 transitions. [2023-08-30 18:47:12,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 509 flow [2023-08-30 18:47:12,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 84 transitions, 509 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:47:12,108 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 288 flow [2023-08-30 18:47:12,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-08-30 18:47:12,109 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-30 18:47:12,109 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 288 flow [2023-08-30 18:47:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:12,110 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:12,118 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 18:47:12,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:12,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:12,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1019027948, now seen corresponding path program 1 times [2023-08-30 18:47:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:12,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214652907] [2023-08-30 18:47:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214652907] [2023-08-30 18:47:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214652907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700759430] [2023-08-30 18:47:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:12,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:12,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:12,668 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 18:47:12,671 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 18:47:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:12,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700759430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:12,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241394975] [2023-08-30 18:47:12,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:12,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-08-30 18:47:12,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:12,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:12,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-08-30 18:47:12,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:13,401 INFO L130 PetriNetUnfolder]: 2197/3199 cut-off events. [2023-08-30 18:47:13,401 INFO L131 PetriNetUnfolder]: For 2563/2563 co-relation queries the response was YES. [2023-08-30 18:47:13,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9024 conditions, 3199 events. 2197/3199 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14135 event pairs, 382 based on Foata normal form. 0/2743 useless extension candidates. Maximal degree in co-relation 8926. Up to 1217 conditions per place. [2023-08-30 18:47:13,419 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 88 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-08-30 18:47:13,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 621 flow [2023-08-30 18:47:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1497 transitions. [2023-08-30 18:47:13,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428994082840237 [2023-08-30 18:47:13,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1497 transitions. [2023-08-30 18:47:13,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1497 transitions. [2023-08-30 18:47:13,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:13,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1497 transitions. [2023-08-30 18:47:13,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.4) internal successors, (1497), 5 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:13,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:13,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:13,434 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 288 flow. Second operand 5 states and 1497 transitions. [2023-08-30 18:47:13,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 621 flow [2023-08-30 18:47:13,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 619 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 18:47:13,442 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 333 flow [2023-08-30 18:47:13,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-08-30 18:47:13,444 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-08-30 18:47:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 333 flow [2023-08-30 18:47:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:13,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:13,445 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:13,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 18:47:13,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:13,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:13,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -673776660, now seen corresponding path program 2 times [2023-08-30 18:47:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760156152] [2023-08-30 18:47:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:13,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760156152] [2023-08-30 18:47:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760156152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580881077] [2023-08-30 18:47:13,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:47:13,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:13,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:13,989 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 18:47:13,999 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 18:47:14,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:47:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:14,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:14,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580881077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:14,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:14,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509562023] [2023-08-30 18:47:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:14,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:14,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:14,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 676 [2023-08-30 18:47:14,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:14,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:14,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 676 [2023-08-30 18:47:14,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:14,903 INFO L130 PetriNetUnfolder]: 2233/3281 cut-off events. [2023-08-30 18:47:14,903 INFO L131 PetriNetUnfolder]: For 5247/5247 co-relation queries the response was YES. [2023-08-30 18:47:14,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9962 conditions, 3281 events. 2233/3281 cut-off events. For 5247/5247 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15022 event pairs, 777 based on Foata normal form. 22/3083 useless extension candidates. Maximal degree in co-relation 9860. Up to 1558 conditions per place. [2023-08-30 18:47:14,922 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 78 selfloop transitions, 8 changer transitions 15/101 dead transitions. [2023-08-30 18:47:14,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 693 flow [2023-08-30 18:47:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1503 transitions. [2023-08-30 18:47:14,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44467455621301777 [2023-08-30 18:47:14,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1503 transitions. [2023-08-30 18:47:14,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1503 transitions. [2023-08-30 18:47:14,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:14,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1503 transitions. [2023-08-30 18:47:14,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.6) internal successors, (1503), 5 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:14,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:14,937 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:14,937 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 333 flow. Second operand 5 states and 1503 transitions. [2023-08-30 18:47:14,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 693 flow [2023-08-30 18:47:14,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 676 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 18:47:14,947 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 355 flow [2023-08-30 18:47:14,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-08-30 18:47:14,950 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-08-30 18:47:14,950 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 355 flow [2023-08-30 18:47:14,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:14,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:14,951 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:14,959 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 18:47:15,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:15,157 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:15,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1334638094, now seen corresponding path program 3 times [2023-08-30 18:47:15,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:15,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52687845] [2023-08-30 18:47:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:15,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:15,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:15,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52687845] [2023-08-30 18:47:15,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52687845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:15,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194794037] [2023-08-30 18:47:15,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:47:15,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:15,466 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 18:47:15,469 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 18:47:15,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:47:15,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:15,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:15,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194794037] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:15,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:47:15,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-08-30 18:47:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862812566] [2023-08-30 18:47:15,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:47:15,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-08-30 18:47:15,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:15,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:15,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-08-30 18:47:15,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:16,488 INFO L130 PetriNetUnfolder]: 2319/3404 cut-off events. [2023-08-30 18:47:16,489 INFO L131 PetriNetUnfolder]: For 6348/6348 co-relation queries the response was YES. [2023-08-30 18:47:16,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 3404 events. 2319/3404 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15599 event pairs, 558 based on Foata normal form. 36/3212 useless extension candidates. Maximal degree in co-relation 10862. Up to 1211 conditions per place. [2023-08-30 18:47:16,507 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 96 selfloop transitions, 13 changer transitions 1/110 dead transitions. [2023-08-30 18:47:16,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 773 flow [2023-08-30 18:47:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1500 transitions. [2023-08-30 18:47:16,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437869822485207 [2023-08-30 18:47:16,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1500 transitions. [2023-08-30 18:47:16,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1500 transitions. [2023-08-30 18:47:16,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:16,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1500 transitions. [2023-08-30 18:47:16,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:16,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:16,520 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:16,520 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 355 flow. Second operand 5 states and 1500 transitions. [2023-08-30 18:47:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 773 flow [2023-08-30 18:47:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 110 transitions, 760 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 18:47:16,532 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 423 flow [2023-08-30 18:47:16,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-30 18:47:16,533 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-08-30 18:47:16,533 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 423 flow [2023-08-30 18:47:16,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:16,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:16,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:16,539 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 18:47:16,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:16,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:16,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash -991347606, now seen corresponding path program 4 times [2023-08-30 18:47:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:16,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260451895] [2023-08-30 18:47:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:16,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:17,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260451895] [2023-08-30 18:47:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260451895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518675661] [2023-08-30 18:47:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:47:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:17,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:17,030 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 18:47:17,055 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 18:47:17,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:47:17,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:17,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518675661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:17,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797480492] [2023-08-30 18:47:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:17,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-08-30 18:47:17,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:17,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:17,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-08-30 18:47:17,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:17,830 INFO L130 PetriNetUnfolder]: 2239/3277 cut-off events. [2023-08-30 18:47:17,830 INFO L131 PetriNetUnfolder]: For 7915/7915 co-relation queries the response was YES. [2023-08-30 18:47:17,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 3277 events. 2239/3277 cut-off events. For 7915/7915 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14785 event pairs, 749 based on Foata normal form. 22/3079 useless extension candidates. Maximal degree in co-relation 11505. Up to 1558 conditions per place. [2023-08-30 18:47:17,846 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 11 changer transitions 13/100 dead transitions. [2023-08-30 18:47:17,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 743 flow [2023-08-30 18:47:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1498 transitions. [2023-08-30 18:47:17,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44319526627218936 [2023-08-30 18:47:17,850 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1498 transitions. [2023-08-30 18:47:17,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1498 transitions. [2023-08-30 18:47:17,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:17,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1498 transitions. [2023-08-30 18:47:17,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:17,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:17,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:17,858 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 423 flow. Second operand 5 states and 1498 transitions. [2023-08-30 18:47:17,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 743 flow [2023-08-30 18:47:17,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 743 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 18:47:17,869 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 452 flow [2023-08-30 18:47:17,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-08-30 18:47:17,870 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2023-08-30 18:47:17,870 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 452 flow [2023-08-30 18:47:17,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:17,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:17,871 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:17,881 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 18:47:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 18:47:18,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:18,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1221850100, now seen corresponding path program 5 times [2023-08-30 18:47:18,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:18,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048082225] [2023-08-30 18:47:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:18,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:18,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:18,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048082225] [2023-08-30 18:47:18,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048082225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:18,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396711738] [2023-08-30 18:47:18,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:47:18,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:18,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:18,369 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 18:47:18,392 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 18:47:18,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:47:18,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:18,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396711738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:18,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:18,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:18,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180849135] [2023-08-30 18:47:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:18,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:18,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-08-30 18:47:18,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:18,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:18,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-08-30 18:47:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:19,491 INFO L130 PetriNetUnfolder]: 2145/3137 cut-off events. [2023-08-30 18:47:19,491 INFO L131 PetriNetUnfolder]: For 10229/10229 co-relation queries the response was YES. [2023-08-30 18:47:19,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 3137 events. 2145/3137 cut-off events. For 10229/10229 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13883 event pairs, 922 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 11531. Up to 2061 conditions per place. [2023-08-30 18:47:19,511 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 79 selfloop transitions, 9 changer transitions 13/101 dead transitions. [2023-08-30 18:47:19,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 787 flow [2023-08-30 18:47:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1496 transitions. [2023-08-30 18:47:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44260355029585796 [2023-08-30 18:47:19,516 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1496 transitions. [2023-08-30 18:47:19,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1496 transitions. [2023-08-30 18:47:19,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:19,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1496 transitions. [2023-08-30 18:47:19,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.2) internal successors, (1496), 5 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:19,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:19,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:19,525 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 452 flow. Second operand 5 states and 1496 transitions. [2023-08-30 18:47:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 787 flow [2023-08-30 18:47:19,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 759 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 18:47:19,547 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 449 flow [2023-08-30 18:47:19,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-08-30 18:47:19,548 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-08-30 18:47:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 449 flow [2023-08-30 18:47:19,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:19,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:19,549 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:19,555 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 18:47:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:19,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:19,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1105708102, now seen corresponding path program 6 times [2023-08-30 18:47:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:19,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002543961] [2023-08-30 18:47:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:20,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002543961] [2023-08-30 18:47:20,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002543961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:20,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564195629] [2023-08-30 18:47:20,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:47:20,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:20,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:20,034 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 18:47:20,037 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 18:47:20,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:47:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:20,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:20,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564195629] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:20,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:20,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:20,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850171419] [2023-08-30 18:47:20,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:20,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:20,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:20,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:20,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:20,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-08-30 18:47:20,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:20,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:20,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-08-30 18:47:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:20,806 INFO L130 PetriNetUnfolder]: 2065/3000 cut-off events. [2023-08-30 18:47:20,807 INFO L131 PetriNetUnfolder]: For 9864/9864 co-relation queries the response was YES. [2023-08-30 18:47:20,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 3000 events. 2065/3000 cut-off events. For 9864/9864 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12975 event pairs, 826 based on Foata normal form. 36/2832 useless extension candidates. Maximal degree in co-relation 11190. Up to 1798 conditions per place. [2023-08-30 18:47:20,824 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 97 selfloop transitions, 12 changer transitions 1/110 dead transitions. [2023-08-30 18:47:20,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 841 flow [2023-08-30 18:47:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:47:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:47:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-08-30 18:47:20,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395956607495069 [2023-08-30 18:47:20,829 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-08-30 18:47:20,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-08-30 18:47:20,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:20,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-08-30 18:47:20,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:20,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:20,838 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:20,838 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 449 flow. Second operand 6 states and 1783 transitions. [2023-08-30 18:47:20,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 841 flow [2023-08-30 18:47:20,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 813 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 18:47:20,862 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 475 flow [2023-08-30 18:47:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=475, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-08-30 18:47:20,863 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-08-30 18:47:20,863 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 475 flow [2023-08-30 18:47:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:20,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:20,864 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:20,872 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 18:47:21,072 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,SelfDestructingSolverStorable11 [2023-08-30 18:47:21,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:21,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1050703873, now seen corresponding path program 1 times [2023-08-30 18:47:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:21,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386423590] [2023-08-30 18:47:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:21,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386423590] [2023-08-30 18:47:21,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386423590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003279900] [2023-08-30 18:47:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:21,350 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 18:47:21,352 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 18:47:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:21,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:21,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003279900] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:21,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:47:21,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2023-08-30 18:47:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319347318] [2023-08-30 18:47:21,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:21,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 18:47:21,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-08-30 18:47:21,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 475 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:21,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:21,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-08-30 18:47:21,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:22,175 INFO L130 PetriNetUnfolder]: 2188/3163 cut-off events. [2023-08-30 18:47:22,176 INFO L131 PetriNetUnfolder]: For 9105/9105 co-relation queries the response was YES. [2023-08-30 18:47:22,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12221 conditions, 3163 events. 2188/3163 cut-off events. For 9105/9105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14004 event pairs, 180 based on Foata normal form. 76/3027 useless extension candidates. Maximal degree in co-relation 12109. Up to 2033 conditions per place. [2023-08-30 18:47:22,191 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 93 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2023-08-30 18:47:22,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 857 flow [2023-08-30 18:47:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-08-30 18:47:22,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-08-30 18:47:22,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-08-30 18:47:22,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-08-30 18:47:22,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:22,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-08-30 18:47:22,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:22,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:22,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:22,203 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 475 flow. Second operand 5 states and 1489 transitions. [2023-08-30 18:47:22,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 857 flow [2023-08-30 18:47:22,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 790 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-30 18:47:22,226 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 499 flow [2023-08-30 18:47:22,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-30 18:47:22,227 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-08-30 18:47:22,228 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 499 flow [2023-08-30 18:47:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:22,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:22,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:22,234 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 18:47:22,434 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,SelfDestructingSolverStorable12 [2023-08-30 18:47:22,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:22,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash 80380509, now seen corresponding path program 2 times [2023-08-30 18:47:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:22,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535114244] [2023-08-30 18:47:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:22,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:22,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535114244] [2023-08-30 18:47:22,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535114244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:22,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226652882] [2023-08-30 18:47:22,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:47:22,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:22,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:22,684 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 18:47:22,687 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 18:47:23,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:47:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:23,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226652882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:23,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934035501] [2023-08-30 18:47:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:23,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-08-30 18:47:23,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:23,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:23,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-08-30 18:47:23,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:23,670 INFO L130 PetriNetUnfolder]: 2170/3145 cut-off events. [2023-08-30 18:47:23,671 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-08-30 18:47:23,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 3145 events. 2170/3145 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13915 event pairs, 752 based on Foata normal form. 18/2951 useless extension candidates. Maximal degree in co-relation 11951. Up to 1803 conditions per place. [2023-08-30 18:47:23,690 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 82 selfloop transitions, 15 changer transitions 0/97 dead transitions. [2023-08-30 18:47:23,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 787 flow [2023-08-30 18:47:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-08-30 18:47:23,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-08-30 18:47:23,695 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-08-30 18:47:23,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-08-30 18:47:23,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:23,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-08-30 18:47:23,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:23,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:23,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:23,703 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 499 flow. Second operand 5 states and 1489 transitions. [2023-08-30 18:47:23,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 787 flow [2023-08-30 18:47:23,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 768 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 18:47:23,726 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 535 flow [2023-08-30 18:47:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-08-30 18:47:23,727 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 43 predicate places. [2023-08-30 18:47:23,727 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 535 flow [2023-08-30 18:47:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:23,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:23,736 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 18:47:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 18:47:23,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:23,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 370126421, now seen corresponding path program 3 times [2023-08-30 18:47:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:23,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713611282] [2023-08-30 18:47:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713611282] [2023-08-30 18:47:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713611282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269958092] [2023-08-30 18:47:24,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:47:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:24,175 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 18:47:24,183 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 18:47:24,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 18:47:24,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:24,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:24,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269958092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:24,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:24,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280632302] [2023-08-30 18:47:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:24,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:24,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:24,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-08-30 18:47:24,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:24,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:24,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-08-30 18:47:24,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:24,981 INFO L130 PetriNetUnfolder]: 2260/3275 cut-off events. [2023-08-30 18:47:24,981 INFO L131 PetriNetUnfolder]: For 10263/10263 co-relation queries the response was YES. [2023-08-30 18:47:24,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13182 conditions, 3275 events. 2260/3275 cut-off events. For 10263/10263 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14490 event pairs, 770 based on Foata normal form. 76/3131 useless extension candidates. Maximal degree in co-relation 13070. Up to 1825 conditions per place. [2023-08-30 18:47:25,002 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 94 selfloop transitions, 16 changer transitions 1/111 dead transitions. [2023-08-30 18:47:25,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 894 flow [2023-08-30 18:47:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 18:47:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 18:47:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-08-30 18:47:25,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395956607495069 [2023-08-30 18:47:25,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-08-30 18:47:25,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-08-30 18:47:25,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:25,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-08-30 18:47:25,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:25,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:25,017 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:25,017 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 535 flow. Second operand 6 states and 1783 transitions. [2023-08-30 18:47:25,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 894 flow [2023-08-30 18:47:25,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 862 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 18:47:25,046 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 544 flow [2023-08-30 18:47:25,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-08-30 18:47:25,047 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-08-30 18:47:25,047 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 544 flow [2023-08-30 18:47:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:25,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:25,048 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:25,054 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 18:47:25,253 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,SelfDestructingSolverStorable14 [2023-08-30 18:47:25,253 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:25,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1112195801, now seen corresponding path program 4 times [2023-08-30 18:47:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563680012] [2023-08-30 18:47:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563680012] [2023-08-30 18:47:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563680012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907612191] [2023-08-30 18:47:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:47:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:25,497 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 18:47:25,522 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 18:47:25,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:47:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:25,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907612191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:25,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:25,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368535642] [2023-08-30 18:47:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:25,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:25,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:25,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 676 [2023-08-30 18:47:25,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 291.8) internal successors, (1459), 5 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:25,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:25,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 676 [2023-08-30 18:47:25,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:26,297 INFO L130 PetriNetUnfolder]: 2242/3257 cut-off events. [2023-08-30 18:47:26,297 INFO L131 PetriNetUnfolder]: For 12776/12776 co-relation queries the response was YES. [2023-08-30 18:47:26,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13563 conditions, 3257 events. 2242/3257 cut-off events. For 12776/12776 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14440 event pairs, 847 based on Foata normal form. 18/3055 useless extension candidates. Maximal degree in co-relation 13450. Up to 2087 conditions per place. [2023-08-30 18:47:26,318 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 87 selfloop transitions, 13 changer transitions 9/109 dead transitions. [2023-08-30 18:47:26,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 924 flow [2023-08-30 18:47:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1498 transitions. [2023-08-30 18:47:26,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44319526627218936 [2023-08-30 18:47:26,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1498 transitions. [2023-08-30 18:47:26,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1498 transitions. [2023-08-30 18:47:26,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:26,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1498 transitions. [2023-08-30 18:47:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:26,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:26,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:26,333 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 544 flow. Second operand 5 states and 1498 transitions. [2023-08-30 18:47:26,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 924 flow [2023-08-30 18:47:26,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 877 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 18:47:26,367 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 555 flow [2023-08-30 18:47:26,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2023-08-30 18:47:26,368 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 47 predicate places. [2023-08-30 18:47:26,368 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 555 flow [2023-08-30 18:47:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.8) internal successors, (1459), 5 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:26,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:26,369 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:26,379 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 18:47:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:26,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:26,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -293042749, now seen corresponding path program 5 times [2023-08-30 18:47:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027812773] [2023-08-30 18:47:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:26,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027812773] [2023-08-30 18:47:26,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027812773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:26,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031616035] [2023-08-30 18:47:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:47:26,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:26,821 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 18:47:26,823 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 18:47:27,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 18:47:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:27,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031616035] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:27,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 18:47:27,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-08-30 18:47:27,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064353040] [2023-08-30 18:47:27,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:27,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:27,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:27,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:27,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 18:47:27,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-08-30 18:47:27,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 555 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:27,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:27,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-08-30 18:47:27,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:27,808 INFO L130 PetriNetUnfolder]: 2141/3138 cut-off events. [2023-08-30 18:47:27,809 INFO L131 PetriNetUnfolder]: For 13140/13140 co-relation queries the response was YES. [2023-08-30 18:47:27,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13278 conditions, 3138 events. 2141/3138 cut-off events. For 13140/13140 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13910 event pairs, 847 based on Foata normal form. 76/2998 useless extension candidates. Maximal degree in co-relation 13164. Up to 2087 conditions per place. [2023-08-30 18:47:27,830 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 92 selfloop transitions, 15 changer transitions 1/108 dead transitions. [2023-08-30 18:47:27,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 913 flow [2023-08-30 18:47:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1491 transitions. [2023-08-30 18:47:27,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411242603550296 [2023-08-30 18:47:27,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1491 transitions. [2023-08-30 18:47:27,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1491 transitions. [2023-08-30 18:47:27,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:27,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1491 transitions. [2023-08-30 18:47:27,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.2) internal successors, (1491), 5 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:27,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:27,842 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:27,842 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 555 flow. Second operand 5 states and 1491 transitions. [2023-08-30 18:47:27,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 913 flow [2023-08-30 18:47:27,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 884 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 18:47:27,875 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 577 flow [2023-08-30 18:47:27,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2023-08-30 18:47:27,876 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-08-30 18:47:27,876 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 577 flow [2023-08-30 18:47:27,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:27,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:27,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:27,883 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 18:47:28,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 18:47:28,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:28,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:28,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2055287147, now seen corresponding path program 6 times [2023-08-30 18:47:28,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:28,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731473101] [2023-08-30 18:47:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:28,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:28,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731473101] [2023-08-30 18:47:28,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731473101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:28,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746958288] [2023-08-30 18:47:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 18:47:28,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:28,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:28,314 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 18:47:28,339 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 18:47:28,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 18:47:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 18:47:28,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:28,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 18:47:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746958288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:47:28,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 18:47:28,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-08-30 18:47:28,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662238878] [2023-08-30 18:47:28,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:47:28,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 18:47:28,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 18:47:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-30 18:47:28,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-08-30 18:47:28,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:28,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:28,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-08-30 18:47:28,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:29,195 INFO L130 PetriNetUnfolder]: 2023/2941 cut-off events. [2023-08-30 18:47:29,195 INFO L131 PetriNetUnfolder]: For 10935/10935 co-relation queries the response was YES. [2023-08-30 18:47:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 2941 events. 2023/2941 cut-off events. For 10935/10935 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12653 event pairs, 847 based on Foata normal form. 18/2759 useless extension candidates. Maximal degree in co-relation 12053. Up to 2087 conditions per place. [2023-08-30 18:47:29,215 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 76 selfloop transitions, 15 changer transitions 10/101 dead transitions. [2023-08-30 18:47:29,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 101 transitions, 881 flow [2023-08-30 18:47:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:47:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:47:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-08-30 18:47:29,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-08-30 18:47:29,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-08-30 18:47:29,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-08-30 18:47:29,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:29,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-08-30 18:47:29,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:29,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:29,227 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:29,227 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 577 flow. Second operand 5 states and 1489 transitions. [2023-08-30 18:47:29,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 101 transitions, 881 flow [2023-08-30 18:47:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 859 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 18:47:29,259 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 573 flow [2023-08-30 18:47:29,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-08-30 18:47:29,259 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-08-30 18:47:29,259 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 573 flow [2023-08-30 18:47:29,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:29,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:29,260 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:29,269 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 18:47:29,466 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,SelfDestructingSolverStorable17 [2023-08-30 18:47:29,466 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:29,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1707227891, now seen corresponding path program 1 times [2023-08-30 18:47:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915377125] [2023-08-30 18:47:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-30 18:47:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915377125] [2023-08-30 18:47:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915377125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905759280] [2023-08-30 18:47:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:29,732 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 18:47:29,735 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 18:47:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 18:47:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:47:30,243 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 18:47:30,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:47:30,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-30 18:47:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:30,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:32,995 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (.cse3 (< |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (and (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse1 (select (select .cse0 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) .cse1) (< .cse2 .cse1) (< .cse1 .cse2))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse6 (select (select .cse7 ~o_4~0.base) c_~o_4~0.offset)) (.cse8 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse4 (select .cse7 ~o_2~0.base))) (or (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= (select .cse4 c_~o_2~0.offset) .cse6)))) (< .cse8 .cse6) (< .cse6 .cse8))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse10 (select (select .cse11 ~o_4~0.base) c_~o_4~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse9 (select .cse11 ~o_2~0.base))) (or (not (= (select .cse9 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< .cse10 (select .cse9 c_~o_2~0.offset))))) (<= (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset) .cse10))))) (or .cse3 (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse13 (select (select .cse12 ~o_4~0.base) c_~o_4~0.offset))) (or (<= (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset) .cse13) (< .cse13 (select (select .cse12 ~o_2~0.base) c_~o_2~0.offset))))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse14 (select (select .cse15 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse14 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (< (select (select .cse15 ~o_2~0.base) c_~o_2~0.offset) .cse14))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse16 (select (select .cse17 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse16 (select (select .cse17 c_~o_0~0.base) c_~o_0~0.offset)) (forall ((~o_2~0.base Int)) (let ((.cse18 (select .cse17 ~o_2~0.base))) (or (not (= (select .cse18 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< (select .cse18 c_~o_2~0.offset) .cse16)))))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse20 (select (select .cse21 ~o_4~0.base) c_~o_4~0.offset)) (.cse22 (select (select .cse21 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse19 (select .cse21 ~o_2~0.base))) (or (not (= (select .cse19 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= .cse20 (select .cse19 c_~o_2~0.offset))))) (< .cse22 .cse20) (< .cse20 .cse22))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse23 (select (select .cse24 ~o_4~0.base) c_~o_4~0.offset)) (.cse25 (select (select .cse24 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= .cse23 (select (select .cse24 ~o_2~0.base) c_~o_2~0.offset)) (< .cse25 .cse23) (< .cse23 .cse25))))) .cse3))) is different from false [2023-08-30 18:47:33,143 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-30 18:47:33,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 273 [2023-08-30 18:47:33,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:47:33,187 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-08-30 18:47:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:47:37,034 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:47:37,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 1 [2023-08-30 18:47:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:47:37,041 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:47:37,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-08-30 18:47:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:47:37,047 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:47:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-08-30 18:47:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905759280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:47:37,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:47:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 16, 14] total 34 [2023-08-30 18:47:37,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96439856] [2023-08-30 18:47:37,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:47:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 18:47:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 18:47:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1005, Unknown=1, NotChecked=64, Total=1190 [2023-08-30 18:47:37,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 676 [2023-08-30 18:47:37,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 573 flow. Second operand has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:37,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:37,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 676 [2023-08-30 18:47:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:41,123 INFO L130 PetriNetUnfolder]: 3918/5639 cut-off events. [2023-08-30 18:47:41,123 INFO L131 PetriNetUnfolder]: For 25606/25606 co-relation queries the response was YES. [2023-08-30 18:47:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23438 conditions, 5639 events. 3918/5639 cut-off events. For 25606/25606 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27801 event pairs, 749 based on Foata normal form. 2/5273 useless extension candidates. Maximal degree in co-relation 23323. Up to 1655 conditions per place. [2023-08-30 18:47:41,151 INFO L137 encePairwiseOnDemand]: 660/676 looper letters, 219 selfloop transitions, 55 changer transitions 114/388 dead transitions. [2023-08-30 18:47:41,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 388 transitions, 4182 flow [2023-08-30 18:47:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 18:47:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 18:47:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5063 transitions. [2023-08-30 18:47:41,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34043840774610007 [2023-08-30 18:47:41,163 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5063 transitions. [2023-08-30 18:47:41,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5063 transitions. [2023-08-30 18:47:41,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:41,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5063 transitions. [2023-08-30 18:47:41,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 230.13636363636363) internal successors, (5063), 22 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:41,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:41,187 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:41,187 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 573 flow. Second operand 22 states and 5063 transitions. [2023-08-30 18:47:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 388 transitions, 4182 flow [2023-08-30 18:47:41,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 388 transitions, 3752 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-30 18:47:41,228 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 1297 flow [2023-08-30 18:47:41,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1297, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2023-08-30 18:47:41,229 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 81 predicate places. [2023-08-30 18:47:41,229 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 1297 flow [2023-08-30 18:47:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:41,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:41,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:41,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 18:47:41,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:41,438 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:41,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash 361103584, now seen corresponding path program 2 times [2023-08-30 18:47:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52891032] [2023-08-30 18:47:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:41,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 18:47:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52891032] [2023-08-30 18:47:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52891032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739313092] [2023-08-30 18:47:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 18:47:41,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:41,691 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 18:47:41,700 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 18:47:41,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 18:47:41,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 18:47:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:42,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 18:47:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739313092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:47:43,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:47:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 10] total 24 [2023-08-30 18:47:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210684261] [2023-08-30 18:47:43,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:47:43,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 18:47:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 18:47:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-30 18:47:43,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 676 [2023-08-30 18:47:43,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 1297 flow. Second operand has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:43,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:47:43,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 676 [2023-08-30 18:47:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:47:48,237 INFO L130 PetriNetUnfolder]: 9070/13068 cut-off events. [2023-08-30 18:47:48,241 INFO L131 PetriNetUnfolder]: For 124535/124535 co-relation queries the response was YES. [2023-08-30 18:47:48,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75424 conditions, 13068 events. 9070/13068 cut-off events. For 124535/124535 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70112 event pairs, 731 based on Foata normal form. 9/13077 useless extension candidates. Maximal degree in co-relation 75374. Up to 3195 conditions per place. [2023-08-30 18:47:48,330 INFO L137 encePairwiseOnDemand]: 661/676 looper letters, 325 selfloop transitions, 267 changer transitions 369/961 dead transitions. [2023-08-30 18:47:48,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 961 transitions, 12493 flow [2023-08-30 18:47:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 18:47:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 18:47:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 13974 transitions. [2023-08-30 18:47:48,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40532544378698226 [2023-08-30 18:47:48,348 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 13974 transitions. [2023-08-30 18:47:48,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 13974 transitions. [2023-08-30 18:47:48,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:47:48,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 13974 transitions. [2023-08-30 18:47:48,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 274.0) internal successors, (13974), 51 states have internal predecessors, (13974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:48,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:48,404 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:48,404 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 1297 flow. Second operand 51 states and 13974 transitions. [2023-08-30 18:47:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 961 transitions, 12493 flow [2023-08-30 18:47:48,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 961 transitions, 11350 flow, removed 559 selfloop flow, removed 8 redundant places. [2023-08-30 18:47:48,907 INFO L231 Difference]: Finished difference. Result has 192 places, 388 transitions, 5981 flow [2023-08-30 18:47:48,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5981, PETRI_PLACES=192, PETRI_TRANSITIONS=388} [2023-08-30 18:47:48,908 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 158 predicate places. [2023-08-30 18:47:48,908 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 388 transitions, 5981 flow [2023-08-30 18:47:48,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:47:48,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:47:48,909 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:47:48,914 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 18:47:49,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:49,109 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:47:49,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:47:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -489564831, now seen corresponding path program 3 times [2023-08-30 18:47:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:47:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271772379] [2023-08-30 18:47:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:47:49,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:47:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:47:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-08-30 18:47:51,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:47:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271772379] [2023-08-30 18:47:51,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271772379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:47:51,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550883381] [2023-08-30 18:47:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 18:47:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:47:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:47:51,801 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 18:47:51,803 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 18:47:52,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-30 18:47:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:47:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-30 18:47:52,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:47:53,231 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 18:47:53,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2023-08-30 18:47:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-08-30 18:47:53,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:47:55,337 INFO L321 Elim1Store]: treesize reduction 19, result has 90.7 percent of original size [2023-08-30 18:47:55,338 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 199 [2023-08-30 18:47:59,128 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:47:59,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-08-30 18:47:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-08-30 18:47:59,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550883381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:47:59,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:47:59,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 39 [2023-08-30 18:47:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424191552] [2023-08-30 18:47:59,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:47:59,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-30 18:47:59,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:47:59,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-30 18:47:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2023-08-30 18:48:03,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 676 [2023-08-30 18:48:03,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 388 transitions, 5981 flow. Second operand has 40 states, 40 states have (on average 244.075) internal successors, (9763), 40 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:03,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:03,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 676 [2023-08-30 18:48:03,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:48:30,993 INFO L130 PetriNetUnfolder]: 15096/21763 cut-off events. [2023-08-30 18:48:30,994 INFO L131 PetriNetUnfolder]: For 437570/437570 co-relation queries the response was YES. [2023-08-30 18:48:31,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169243 conditions, 21763 events. 15096/21763 cut-off events. For 437570/437570 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 124707 event pairs, 1042 based on Foata normal form. 45/21808 useless extension candidates. Maximal degree in co-relation 169103. Up to 6203 conditions per place. [2023-08-30 18:48:31,176 INFO L137 encePairwiseOnDemand]: 658/676 looper letters, 648 selfloop transitions, 844 changer transitions 253/1745 dead transitions. [2023-08-30 18:48:31,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1745 transitions, 27640 flow [2023-08-30 18:48:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 18:48:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 18:48:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 23256 transitions. [2023-08-30 18:48:31,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699179232677992 [2023-08-30 18:48:31,205 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 23256 transitions. [2023-08-30 18:48:31,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 23256 transitions. [2023-08-30 18:48:31,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:48:31,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 23256 transitions. [2023-08-30 18:48:31,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 250.06451612903226) internal successors, (23256), 93 states have internal predecessors, (23256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,302 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:31,302 INFO L175 Difference]: Start difference. First operand has 192 places, 388 transitions, 5981 flow. Second operand 93 states and 23256 transitions. [2023-08-30 18:48:31,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1745 transitions, 27640 flow [2023-08-30 18:48:35,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1745 transitions, 24299 flow, removed 1665 selfloop flow, removed 24 redundant places. [2023-08-30 18:48:35,200 INFO L231 Difference]: Finished difference. Result has 285 places, 1104 transitions, 17571 flow [2023-08-30 18:48:35,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=17571, PETRI_PLACES=285, PETRI_TRANSITIONS=1104} [2023-08-30 18:48:35,201 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-08-30 18:48:35,201 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1104 transitions, 17571 flow [2023-08-30 18:48:35,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 244.075) internal successors, (9763), 40 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:35,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:48:35,202 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:48:35,208 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 18:48:35,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:35,403 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:48:35,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:48:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash -541040723, now seen corresponding path program 4 times [2023-08-30 18:48:35,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:48:35,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159052187] [2023-08-30 18:48:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:48:35,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:48:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:48:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-08-30 18:48:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:48:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159052187] [2023-08-30 18:48:38,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159052187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:48:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622178936] [2023-08-30 18:48:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 18:48:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:48:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:48:38,677 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 18:48:38,679 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 18:48:38,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 18:48:38,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:48:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 84 conjunts are in the unsatisfiable core [2023-08-30 18:48:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:48:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 18:48:39,180 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 18:48:39,554 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:48:39,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-08-30 18:48:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-30 18:48:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:48:40,975 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse4 (select .cse3 ~o_2~0.base))) (or (forall ((~o_4~0.base Int)) (let ((.cse0 (select .cse4 c_~o_2~0.offset)) (.cse1 (select (select .cse3 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse3 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse0 .cse1) (= .cse2 .cse1) (< .cse0 .cse1) (< .cse1 .cse2)))) (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)))))) (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse6 (select .cse9 ~o_2~0.base))) (or (not (= (select .cse6 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (forall ((~o_4~0.base Int)) (let ((.cse7 (select .cse6 c_~o_2~0.offset)) (.cse8 (select (select .cse9 ~o_4~0.base) c_~o_4~0.offset))) (or (= .cse7 .cse8) (< .cse8 .cse7) (<= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) .cse8)))))))))) is different from false [2023-08-30 18:48:41,100 INFO L321 Elim1Store]: treesize reduction 23, result has 81.0 percent of original size [2023-08-30 18:48:41,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 269 [2023-08-30 18:48:41,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 18:48:41,134 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-08-30 18:48:46,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 18:48:46,072 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:48:46,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 1 [2023-08-30 18:48:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-30 18:48:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622178936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:48:46,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:48:46,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 14] total 48 [2023-08-30 18:48:46,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293935004] [2023-08-30 18:48:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:48:46,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-30 18:48:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:48:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-30 18:48:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2173, Unknown=1, NotChecked=94, Total=2450 [2023-08-30 18:48:46,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 676 [2023-08-30 18:48:46,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1104 transitions, 17571 flow. Second operand has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:48:46,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:48:46,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 676 [2023-08-30 18:48:46,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:49:05,682 INFO L130 PetriNetUnfolder]: 23286/33325 cut-off events. [2023-08-30 18:49:05,682 INFO L131 PetriNetUnfolder]: For 1557338/1557338 co-relation queries the response was YES. [2023-08-30 18:49:06,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342277 conditions, 33325 events. 23286/33325 cut-off events. For 1557338/1557338 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 200788 event pairs, 1080 based on Foata normal form. 24/33349 useless extension candidates. Maximal degree in co-relation 342080. Up to 9262 conditions per place. [2023-08-30 18:49:06,223 INFO L137 encePairwiseOnDemand]: 655/676 looper letters, 1351 selfloop transitions, 1097 changer transitions 141/2589 dead transitions. [2023-08-30 18:49:06,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2589 transitions, 48666 flow [2023-08-30 18:49:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 18:49:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 18:49:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 11553 transitions. [2023-08-30 18:49:06,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051827979712595 [2023-08-30 18:49:06,240 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 11553 transitions. [2023-08-30 18:49:06,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 11553 transitions. [2023-08-30 18:49:06,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:49:06,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 11553 transitions. [2023-08-30 18:49:06,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 206.30357142857142) internal successors, (11553), 56 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,405 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:06,406 INFO L175 Difference]: Start difference. First operand has 285 places, 1104 transitions, 17571 flow. Second operand 56 states and 11553 transitions. [2023-08-30 18:49:06,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2589 transitions, 48666 flow [2023-08-30 18:49:22,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 2589 transitions, 45133 flow, removed 1696 selfloop flow, removed 10 redundant places. [2023-08-30 18:49:22,414 INFO L231 Difference]: Finished difference. Result has 353 places, 1657 transitions, 29562 flow [2023-08-30 18:49:22,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=15470, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29562, PETRI_PLACES=353, PETRI_TRANSITIONS=1657} [2023-08-30 18:49:22,415 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 319 predicate places. [2023-08-30 18:49:22,415 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1657 transitions, 29562 flow [2023-08-30 18:49:22,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:22,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:49:22,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:49:22,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 18:49:22,617 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,SelfDestructingSolverStorable21 [2023-08-30 18:49:22,617 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 18:49:22,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:49:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1981758789, now seen corresponding path program 5 times [2023-08-30 18:49:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:49:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487583277] [2023-08-30 18:49:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:49:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:49:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:49:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 18:49:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:49:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487583277] [2023-08-30 18:49:26,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487583277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:49:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161757652] [2023-08-30 18:49:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 18:49:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:49:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:49:26,377 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 18:49:26,384 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 18:49:26,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-30 18:49:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 18:49:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 18:49:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:49:27,311 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 18:49:27,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-08-30 18:49:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:49:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:49:28,752 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-08-30 18:49:28,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 98 [2023-08-30 18:49:28,862 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-30 18:49:28,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-08-30 18:49:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 18:49:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161757652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:49:28,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:49:28,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 12] total 51 [2023-08-30 18:49:28,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097033775] [2023-08-30 18:49:28,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:49:28,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-30 18:49:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:49:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-30 18:49:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2023-08-30 18:49:35,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 676 [2023-08-30 18:49:35,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1657 transitions, 29562 flow. Second operand has 52 states, 52 states have (on average 226.90384615384616) internal successors, (11799), 52 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 18:49:35,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:49:35,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 676 [2023-08-30 18:49:35,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand