./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:01:15,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:01:15,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:01:15,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:01:15,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:01:15,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:01:15,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:01:15,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:01:15,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:01:15,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:01:15,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:01:15,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:01:15,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:01:15,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:01:15,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:01:15,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:01:15,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:01:15,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:01:15,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:01:15,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:01:15,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:01:15,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:01:15,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:01:15,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:01:15,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:01:15,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:01:15,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:01:15,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:01:15,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:01:15,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:01:15,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:01:15,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:01:15,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:01:15,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:01:15,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:01:15,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:01:15,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:01:15,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:01:15,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:01:15,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:01:15,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:01:15,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:01:15,690 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:01:15,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:01:15,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:01:15,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:01:15,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:01:15,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:01:15,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:01:15,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:01:15,693 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:01:15,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:01:15,694 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:01:15,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:01:15,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:01:15,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:01:15,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:01:15,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:01:15,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:01:15,696 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:01:15,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:01:15,696 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:01:15,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:01:15,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:01:15,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:01:15,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:01:15,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:01:15,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:01:15,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:01:15,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:01:15,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:01:15,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:01:15,698 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:01:15,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:01:15,699 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:01:15,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:01:15,699 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:01:15,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:01:16,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:01:16,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:01:16,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:01:16,053 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:01:16,054 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:01:16,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 12:01:17,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:01:17,482 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:01:17,482 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-09-01 12:01:17,493 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d961366d/f46ad15f89ab4cf7bf341cf30f297c43/FLAGdb571dba5 [2023-09-01 12:01:17,505 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d961366d/f46ad15f89ab4cf7bf341cf30f297c43 [2023-09-01 12:01:17,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:01:17,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:01:17,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:01:17,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:01:17,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:01:17,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e690844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17, skipping insertion in model container [2023-09-01 12:01:17,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:01:17,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:01:17,722 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-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 12:01:17,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:01:17,753 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:01:17,794 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-name-comparator-trans.wvr.c[4788,4801] [2023-09-01 12:01:17,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:01:17,825 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:01:17,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17 WrapperNode [2023-09-01 12:01:17,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:01:17,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:01:17,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:01:17,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:01:17,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,884 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-09-01 12:01:17,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:01:17,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:01:17,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:01:17,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:01:17,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:01:17,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:01:17,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:01:17,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:01:17,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (1/1) ... [2023-09-01 12:01:17,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:01:17,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:17,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:01:18,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:01:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:01:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:01:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:01:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:01:18,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:01:18,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:01:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:01:18,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:01:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:01:18,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:01:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:01:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:01:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:01:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:01:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:01:18,039 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:01:18,182 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:01:18,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:01:18,642 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:01:18,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:01:18,658 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 12:01:18,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:01:18 BoogieIcfgContainer [2023-09-01 12:01:18,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:01:18,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:01:18,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:01:18,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:01:18,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:01:17" (1/3) ... [2023-09-01 12:01:18,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29138560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:01:18, skipping insertion in model container [2023-09-01 12:01:18,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:01:17" (2/3) ... [2023-09-01 12:01:18,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29138560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:01:18, skipping insertion in model container [2023-09-01 12:01:18,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:01:18" (3/3) ... [2023-09-01 12:01:18,675 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-09-01 12:01:18,683 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:01:18,692 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:01:18,692 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:01:18,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:01:18,831 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:01:18,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-09-01 12:01:19,077 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-09-01 12:01:19,077 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:01:19,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-09-01 12:01:19,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-09-01 12:01:19,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-09-01 12:01:19,108 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:01:19,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-09-01 12:01:19,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-09-01 12:01:19,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-09-01 12:01:19,204 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-09-01 12:01:19,204 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:01:19,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-09-01 12:01:19,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-09-01 12:01:29,657 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-09-01 12:01:29,657 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-09-01 12:01:29,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:01:29,677 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;@3299b445, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:01:29,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:01:29,683 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-09-01 12:01:29,683 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:01:29,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:29,684 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] [2023-09-01 12:01:29,685 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)] === [2023-09-01 12:01:29,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-09-01 12:01:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:29,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837905110] [2023-09-01 12:01:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:30,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837905110] [2023-09-01 12:01:30,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837905110] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:30,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:30,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:01:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66853129] [2023-09-01 12:01:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:30,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:01:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:01:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:01:30,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 771 [2023-09-01 12:01:30,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:30,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 771 [2023-09-01 12:01:30,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:30,394 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-09-01 12:01:30,394 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-09-01 12:01:30,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-09-01 12:01:30,400 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-09-01 12:01:30,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-09-01 12:01:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:01:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:01:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-09-01 12:01:30,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43925637699956765 [2023-09-01 12:01:30,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-09-01 12:01:30,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-09-01 12:01:30,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:30,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-09-01 12:01:30,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,442 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1016 transitions. [2023-09-01 12:01:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-09-01 12:01:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:30,447 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-09-01 12:01:30,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-09-01 12:01:30,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-09-01 12:01:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-09-01 12:01:30,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:30,453 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] [2023-09-01 12:01:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:01:30,454 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)] === [2023-09-01 12:01:30,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-09-01 12:01:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109032733] [2023-09-01 12:01:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:30,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109032733] [2023-09-01 12:01:30,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109032733] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829254938] [2023-09-01 12:01:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:30,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:30,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:01:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:01:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:30,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829254938] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:30,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 12:01:30,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953154512] [2023-09-01 12:01:30,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:30,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:01:30,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:30,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:01:30,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:01:30,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 771 [2023-09-01 12:01:30,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:30,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:30,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 771 [2023-09-01 12:01:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:31,068 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-09-01 12:01:31,070 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:01:31,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-09-01 12:01:31,071 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-09-01 12:01:31,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-09-01 12:01:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:01:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:01:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1669 transitions. [2023-09-01 12:01:31,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329442282749676 [2023-09-01 12:01:31,076 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1669 transitions. [2023-09-01 12:01:31,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1669 transitions. [2023-09-01 12:01:31,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:31,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1669 transitions. [2023-09-01 12:01:31,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.8) internal successors, (1669), 5 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:31,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:31,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:31,090 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1669 transitions. [2023-09-01 12:01:31,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-09-01 12:01:31,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:31,092 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-09-01 12:01:31,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-09-01 12:01:31,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-09-01 12:01:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-09-01 12:01:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 331.85714285714283) internal successors, (2323), 7 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:31,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:31,095 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:31,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:31,302 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)] === [2023-09-01 12:01:31,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-09-01 12:01:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:31,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410104623] [2023-09-01 12:01:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:01:31,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410104623] [2023-09-01 12:01:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410104623] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:31,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:31,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:01:31,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516035014] [2023-09-01 12:01:31,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:31,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:01:31,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:01:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:01:31,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 771 [2023-09-01 12:01:31,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:31,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:31,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 771 [2023-09-01 12:01:31,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:32,090 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-09-01 12:01:32,090 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:01:32,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-09-01 12:01:32,092 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-09-01 12:01:32,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-09-01 12:01:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:01:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:01:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1286 transitions. [2023-09-01 12:01:32,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169909208819715 [2023-09-01 12:01:32,096 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1286 transitions. [2023-09-01 12:01:32,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1286 transitions. [2023-09-01 12:01:32,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:32,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1286 transitions. [2023-09-01 12:01:32,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,106 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1286 transitions. [2023-09-01 12:01:32,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-09-01 12:01:32,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 12:01:32,108 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-09-01 12:01:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-09-01 12:01:32,109 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-09-01 12:01:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-09-01 12:01:32,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.2) internal successors, (1561), 5 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:32,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:32,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:01:32,111 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)] === [2023-09-01 12:01:32,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-09-01 12:01:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:32,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317698258] [2023-09-01 12:01:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:01:32,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317698258] [2023-09-01 12:01:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317698258] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:01:32,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:01:32,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:01:32,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210364430] [2023-09-01 12:01:32,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:01:32,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:01:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:01:32,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:01:32,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 771 [2023-09-01 12:01:32,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:32,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 771 [2023-09-01 12:01:32,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:32,703 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-09-01 12:01:32,703 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-09-01 12:01:32,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-09-01 12:01:32,706 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-09-01 12:01:32,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-09-01 12:01:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:01:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:01:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1328 transitions. [2023-09-01 12:01:32,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060959792477305 [2023-09-01 12:01:32,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1328 transitions. [2023-09-01 12:01:32,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1328 transitions. [2023-09-01 12:01:32,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:32,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1328 transitions. [2023-09-01 12:01:32,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,720 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,721 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1328 transitions. [2023-09-01 12:01:32,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-09-01 12:01:32,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 12:01:32,723 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-09-01 12:01:32,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-09-01 12:01:32,723 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-09-01 12:01:32,724 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-09-01 12:01:32,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:32,725 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:32,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:01:32,725 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)] === [2023-09-01 12:01:32,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-09-01 12:01:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261357325] [2023-09-01 12:01:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:01:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261357325] [2023-09-01 12:01:34,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261357325] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:34,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386483617] [2023-09-01 12:01:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:34,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:34,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:34,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:34,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:01:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:34,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 12:01:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:35,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 138 [2023-09-01 12:01:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:01:36,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:38,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:38,129 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 200 treesize of output 108 [2023-09-01 12:01:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:01:38,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386483617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:38,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-09-01 12:01:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290996904] [2023-09-01 12:01:38,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:38,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 12:01:38,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 12:01:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 12:01:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 771 [2023-09-01 12:01:41,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:41,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:41,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 771 [2023-09-01 12:01:41,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:04,007 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-09-01 12:02:04,008 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-09-01 12:02:04,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-09-01 12:02:04,027 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-09-01 12:02:04,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-09-01 12:02:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-09-01 12:02:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-09-01 12:02:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 30505 transitions. [2023-09-01 12:02:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35326338706688903 [2023-09-01 12:02:04,121 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 30505 transitions. [2023-09-01 12:02:04,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 30505 transitions. [2023-09-01 12:02:04,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:04,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 30505 transitions. [2023-09-01 12:02:04,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 272.36607142857144) internal successors, (30505), 112 states have internal predecessors, (30505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,337 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,338 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 30505 transitions. [2023-09-01 12:02:04,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-09-01 12:02:04,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-09-01 12:02:04,358 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-09-01 12:02:04,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-09-01 12:02:04,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-09-01 12:02:04,362 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-09-01 12:02:04,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 266.1515151515151) internal successors, (8783), 33 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:04,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:04,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:04,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:04,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:04,572 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)] === [2023-09-01 12:02:04,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-09-01 12:02:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714254584] [2023-09-01 12:02:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:05,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:05,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714254584] [2023-09-01 12:02:05,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714254584] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:05,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689043131] [2023-09-01 12:02:05,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:02:05,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:05,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:05,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:02:06,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:02:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 12:02:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:02:06,461 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 100 treesize of output 90 [2023-09-01 12:02:07,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-09-01 12:02:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:07,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:09,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:09,020 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 219 treesize of output 139 [2023-09-01 12:02:09,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-09-01 12:02:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689043131] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:09,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:09,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 12:02:09,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621868063] [2023-09-01 12:02:09,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:02:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:02:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-09-01 12:02:12,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-09-01 12:02:12,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:12,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:12,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-09-01 12:02:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:25,472 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-09-01 12:02:25,473 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-09-01 12:02:25,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-09-01 12:02:25,632 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-09-01 12:02:25,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-09-01 12:02:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 12:02:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 12:02:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-09-01 12:02:25,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-09-01 12:02:25,651 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-09-01 12:02:25,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-09-01 12:02:25,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:25,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-09-01 12:02:25,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:25,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:25,717 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:25,717 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-09-01 12:02:25,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-09-01 12:02:27,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-09-01 12:02:27,672 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-09-01 12:02:27,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-09-01 12:02:27,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-09-01 12:02:27,673 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-09-01 12:02:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:27,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:27,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:27,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:27,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:27,884 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)] === [2023-09-01 12:02:27,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-09-01 12:02:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:27,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753152175] [2023-09-01 12:02:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:27,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753152175] [2023-09-01 12:02:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753152175] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:28,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651068429] [2023-09-01 12:02:28,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:02:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:28,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:28,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:02:28,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:02:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 12:02:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 89 [2023-09-01 12:02:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:29,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:30,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:30,455 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 136 treesize of output 76 [2023-09-01 12:02:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:02:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651068429] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:30,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-09-01 12:02:30,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514888650] [2023-09-01 12:02:30,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:02:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:02:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:02:31,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-09-01 12:02:31,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:31,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:31,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-09-01 12:02:31,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:37,451 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-09-01 12:02:37,451 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-09-01 12:02:37,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-09-01 12:02:37,653 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-09-01 12:02:37,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-09-01 12:02:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 12:02:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 12:02:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 8591 transitions. [2023-09-01 12:02:37,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842300639563487 [2023-09-01 12:02:37,665 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 8591 transitions. [2023-09-01 12:02:37,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 8591 transitions. [2023-09-01 12:02:37,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:37,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 8591 transitions. [2023-09-01 12:02:37,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 296.2413793103448) internal successors, (8591), 29 states have internal predecessors, (8591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:37,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:37,706 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:37,706 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 8591 transitions. [2023-09-01 12:02:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-09-01 12:03:01,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-09-01 12:03:01,978 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-09-01 12:03:01,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-09-01 12:03:01,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-09-01 12:03:01,979 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-09-01 12:03:01,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:01,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:01,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:01,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:02,182 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)] === [2023-09-01 12:03:02,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-09-01 12:03:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032718148] [2023-09-01 12:03:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:03,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032718148] [2023-09-01 12:03:03,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032718148] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313475491] [2023-09-01 12:03:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:03:03,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:03,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:03,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:03,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:03:03,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:03:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:03:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:03,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:03:03,719 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 39 treesize of output 37 [2023-09-01 12:03:03,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 81 [2023-09-01 12:03:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:04,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:05,262 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0)))) (<= c_~result_4~0 0)) is different from false [2023-09-01 12:03:05,465 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (= c_~break_7~0 0))) (and (or .cse0 (<= c_~result_4~0 0)) (or (<= c_~name_1~0 c_~name_2~0) (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~i_5~0 3) (not .cse0)))) (and (forall ((v_ArrVal_326 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (or (< (+ 2147483647 c_~name_1~0) c_~name_2~0) (<= c_~name_2~0 c_~name_1~0) (forall ((v_ArrVal_326 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_326) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_1~0))))) is different from false [2023-09-01 12:03:05,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:05,593 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 212 treesize of output 132 [2023-09-01 12:03:05,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-09-01 12:03:05,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-09-01 12:03:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-09-01 12:03:05,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313475491] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:05,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:05,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-09-01 12:03:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883036232] [2023-09-01 12:03:05,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:05,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 12:03:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 12:03:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=8, NotChecked=118, Total=1056 [2023-09-01 12:03:06,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-09-01 12:03:06,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:06,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:06,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-09-01 12:03:06,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:18,347 INFO L130 PetriNetUnfolder]: 13749/21844 cut-off events. [2023-09-01 12:03:18,348 INFO L131 PetriNetUnfolder]: For 240435/240435 co-relation queries the response was YES. [2023-09-01 12:03:18,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118823 conditions, 21844 events. 13749/21844 cut-off events. For 240435/240435 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 157779 event pairs, 1668 based on Foata normal form. 21/20057 useless extension candidates. Maximal degree in co-relation 118715. Up to 4592 conditions per place. [2023-09-01 12:03:18,579 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1167 selfloop transitions, 668 changer transitions 73/1908 dead transitions. [2023-09-01 12:03:18,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1908 transitions, 21276 flow [2023-09-01 12:03:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 12:03:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 12:03:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8895 transitions. [2023-09-01 12:03:18,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32047124945957634 [2023-09-01 12:03:18,592 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8895 transitions. [2023-09-01 12:03:18,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8895 transitions. [2023-09-01 12:03:18,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:18,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8895 transitions. [2023-09-01 12:03:18,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 247.08333333333334) internal successors, (8895), 36 states have internal predecessors, (8895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:18,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:18,635 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 771.0) internal successors, (28527), 37 states have internal predecessors, (28527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:18,635 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 36 states and 8895 transitions. [2023-09-01 12:03:18,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1908 transitions, 21276 flow [2023-09-01 12:03:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1908 transitions, 20865 flow, removed 179 selfloop flow, removed 8 redundant places. [2023-09-01 12:03:21,545 INFO L231 Difference]: Finished difference. Result has 341 places, 1237 transitions, 13386 flow [2023-09-01 12:03:21,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13386, PETRI_PLACES=341, PETRI_TRANSITIONS=1237} [2023-09-01 12:03:21,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-09-01 12:03:21,546 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1237 transitions, 13386 flow [2023-09-01 12:03:21,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:21,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:21,548 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:21,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:21,749 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)] === [2023-09-01 12:03:21,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-09-01 12:03:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880206247] [2023-09-01 12:03:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:03:23,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880206247] [2023-09-01 12:03:23,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880206247] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080793857] [2023-09-01 12:03:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:03:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:23,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:03:23,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:03:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:03:23,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:23,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2023-09-01 12:03:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:24,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:24,247 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 117 treesize of output 69 [2023-09-01 12:03:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:24,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080793857] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:24,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-09-01 12:03:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743979423] [2023-09-01 12:03:24,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:03:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:03:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:03:27,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 771 [2023-09-01 12:03:27,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1237 transitions, 13386 flow. Second operand has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:27,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:27,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 771 [2023-09-01 12:03:27,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:39,691 INFO L130 PetriNetUnfolder]: 17724/29221 cut-off events. [2023-09-01 12:03:39,691 INFO L131 PetriNetUnfolder]: For 405257/405257 co-relation queries the response was YES. [2023-09-01 12:03:40,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176807 conditions, 29221 events. 17724/29221 cut-off events. For 405257/405257 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 233697 event pairs, 3151 based on Foata normal form. 64/26735 useless extension candidates. Maximal degree in co-relation 176668. Up to 10768 conditions per place. [2023-09-01 12:03:40,366 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1573 selfloop transitions, 697 changer transitions 27/2297 dead transitions. [2023-09-01 12:03:40,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2297 transitions, 30541 flow [2023-09-01 12:03:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 12:03:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 12:03:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 11639 transitions. [2023-09-01 12:03:40,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36819461579829804 [2023-09-01 12:03:40,387 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 11639 transitions. [2023-09-01 12:03:40,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 11639 transitions. [2023-09-01 12:03:40,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:40,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 11639 transitions. [2023-09-01 12:03:40,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 283.8780487804878) internal successors, (11639), 41 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:40,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:40,435 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:40,436 INFO L175 Difference]: Start difference. First operand has 341 places, 1237 transitions, 13386 flow. Second operand 41 states and 11639 transitions. [2023-09-01 12:03:40,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2297 transitions, 30541 flow [2023-09-01 12:03:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 2297 transitions, 27987 flow, removed 1249 selfloop flow, removed 8 redundant places. [2023-09-01 12:03:47,810 INFO L231 Difference]: Finished difference. Result has 397 places, 1552 transitions, 19131 flow [2023-09-01 12:03:47,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12424, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19131, PETRI_PLACES=397, PETRI_TRANSITIONS=1552} [2023-09-01 12:03:47,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-09-01 12:03:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1552 transitions, 19131 flow [2023-09-01 12:03:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 276.1290322580645) internal successors, (8560), 31 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:47,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:47,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:47,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:48,014 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)] === [2023-09-01 12:03:48,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash -791885760, now seen corresponding path program 6 times [2023-09-01 12:03:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:48,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084921517] [2023-09-01 12:03:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:03:49,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:49,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084921517] [2023-09-01 12:03:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084921517] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:49,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327499551] [2023-09-01 12:03:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:03:49,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:49,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:49,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:03:49,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:03:49,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 12:03:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:49,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2023-09-01 12:03:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:50,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:50,556 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 117 treesize of output 69 [2023-09-01 12:03:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:03:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327499551] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:50,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-09-01 12:03:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722353583] [2023-09-01 12:03:50,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:50,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:03:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:03:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:03:53,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-09-01 12:03:53,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1552 transitions, 19131 flow. Second operand has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:53,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:53,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-09-01 12:03:53,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:07,264 INFO L130 PetriNetUnfolder]: 19652/32601 cut-off events. [2023-09-01 12:04:07,264 INFO L131 PetriNetUnfolder]: For 584593/584593 co-relation queries the response was YES. [2023-09-01 12:04:07,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221645 conditions, 32601 events. 19652/32601 cut-off events. For 584593/584593 co-relation queries the response was YES. Maximal size of possible extension queue 1750. Compared 267281 event pairs, 3374 based on Foata normal form. 60/29599 useless extension candidates. Maximal degree in co-relation 221483. Up to 11973 conditions per place. [2023-09-01 12:04:08,019 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1528 selfloop transitions, 696 changer transitions 1/2225 dead transitions. [2023-09-01 12:04:08,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2225 transitions, 32568 flow [2023-09-01 12:04:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:04:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:04:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 6238 transitions. [2023-09-01 12:04:08,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3677632354675156 [2023-09-01 12:04:08,027 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 6238 transitions. [2023-09-01 12:04:08,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 6238 transitions. [2023-09-01 12:04:08,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:08,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 6238 transitions. [2023-09-01 12:04:08,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 283.54545454545456) internal successors, (6238), 22 states have internal predecessors, (6238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:08,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:08,046 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 771.0) internal successors, (17733), 23 states have internal predecessors, (17733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:08,046 INFO L175 Difference]: Start difference. First operand has 397 places, 1552 transitions, 19131 flow. Second operand 22 states and 6238 transitions. [2023-09-01 12:04:08,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2225 transitions, 32568 flow [2023-09-01 12:04:21,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 2225 transitions, 31112 flow, removed 681 selfloop flow, removed 13 redundant places. [2023-09-01 12:04:21,596 INFO L231 Difference]: Finished difference. Result has 414 places, 1708 transitions, 23194 flow [2023-09-01 12:04:21,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=17851, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=23194, PETRI_PLACES=414, PETRI_TRANSITIONS=1708} [2023-09-01 12:04:21,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2023-09-01 12:04:21,599 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1708 transitions, 23194 flow [2023-09-01 12:04:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 275.1290322580645) internal successors, (8529), 31 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:21,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:21,601 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:21,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:21,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:21,802 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)] === [2023-09-01 12:04:21,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:21,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1590517810, now seen corresponding path program 7 times [2023-09-01 12:04:21,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:21,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406940927] [2023-09-01 12:04:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:21,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406940927] [2023-09-01 12:04:22,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406940927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038198480] [2023-09-01 12:04:22,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:04:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:22,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:04:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:04:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 12:04:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:23,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2023-09-01 12:04:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:23,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:04:24,043 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 12:04:24,044 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 109 treesize of output 56 [2023-09-01 12:04:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038198480] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:04:24,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:04:24,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-09-01 12:04:24,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443010605] [2023-09-01 12:04:24,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:04:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:04:24,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:04:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-09-01 12:04:25,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 771 [2023-09-01 12:04:25,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1708 transitions, 23194 flow. Second operand has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:25,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:25,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 771 [2023-09-01 12:04:25,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:41,424 INFO L130 PetriNetUnfolder]: 19546/32381 cut-off events. [2023-09-01 12:04:41,424 INFO L131 PetriNetUnfolder]: For 694504/694504 co-relation queries the response was YES. [2023-09-01 12:04:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238080 conditions, 32381 events. 19546/32381 cut-off events. For 694504/694504 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 263486 event pairs, 3801 based on Foata normal form. 170/29891 useless extension candidates. Maximal degree in co-relation 237916. Up to 17228 conditions per place. [2023-09-01 12:04:42,233 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1602 selfloop transitions, 628 changer transitions 3/2233 dead transitions. [2023-09-01 12:04:42,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 2233 transitions, 34727 flow [2023-09-01 12:04:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 12:04:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 12:04:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 9387 transitions. [2023-09-01 12:04:42,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894234170498763 [2023-09-01 12:04:42,241 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 9387 transitions. [2023-09-01 12:04:42,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 9387 transitions. [2023-09-01 12:04:42,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:42,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 9387 transitions. [2023-09-01 12:04:42,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 284.45454545454544) internal successors, (9387), 33 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:42,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:42,270 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 771.0) internal successors, (26214), 34 states have internal predecessors, (26214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:42,271 INFO L175 Difference]: Start difference. First operand has 414 places, 1708 transitions, 23194 flow. Second operand 33 states and 9387 transitions. [2023-09-01 12:04:42,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 2233 transitions, 34727 flow [2023-09-01 12:04:56,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2233 transitions, 33484 flow, removed 471 selfloop flow, removed 12 redundant places. [2023-09-01 12:04:56,752 INFO L231 Difference]: Finished difference. Result has 445 places, 1762 transitions, 24887 flow [2023-09-01 12:04:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=22172, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=24887, PETRI_PLACES=445, PETRI_TRANSITIONS=1762} [2023-09-01 12:04:56,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2023-09-01 12:04:56,754 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1762 transitions, 24887 flow [2023-09-01 12:04:56,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 277.39285714285717) internal successors, (7767), 28 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:56,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:56,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:56,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:56,955 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,SelfDestructingSolverStorable10 [2023-09-01 12:04:56,956 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)] === [2023-09-01 12:04:56,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1714295696, now seen corresponding path program 8 times [2023-09-01 12:04:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:56,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078260268] [2023-09-01 12:04:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:57,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078260268] [2023-09-01 12:04:57,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078260268] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:57,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453483806] [2023-09-01 12:04:57,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:04:57,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:57,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:57,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:04:57,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:04:57,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:04:57,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:04:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 12:04:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:57,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 78 [2023-09-01 12:04:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:04:58,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:04:58,465 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 117 treesize of output 69 [2023-09-01 12:04:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:04:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453483806] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:04:58,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:04:58,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-09-01 12:04:58,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885178358] [2023-09-01 12:04:58,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:04:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 12:04:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 12:04:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-09-01 12:05:00,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 771 [2023-09-01 12:05:00,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1762 transitions, 24887 flow. Second operand has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:00,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:00,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 771 [2023-09-01 12:05:00,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:05:18,728 INFO L130 PetriNetUnfolder]: 20477/33896 cut-off events. [2023-09-01 12:05:18,729 INFO L131 PetriNetUnfolder]: For 713737/713737 co-relation queries the response was YES. [2023-09-01 12:05:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251655 conditions, 33896 events. 20477/33896 cut-off events. For 713737/713737 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 277767 event pairs, 5474 based on Foata normal form. 72/31184 useless extension candidates. Maximal degree in co-relation 251483. Up to 21954 conditions per place. [2023-09-01 12:05:20,065 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1890 selfloop transitions, 370 changer transitions 0/2260 dead transitions. [2023-09-01 12:05:20,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2260 transitions, 35918 flow [2023-09-01 12:05:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:05:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:05:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7811 transitions. [2023-09-01 12:05:20,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38965379626858226 [2023-09-01 12:05:20,072 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7811 transitions. [2023-09-01 12:05:20,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7811 transitions. [2023-09-01 12:05:20,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:05:20,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7811 transitions. [2023-09-01 12:05:20,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 300.4230769230769) internal successors, (7811), 26 states have internal predecessors, (7811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:20,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:20,094 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 771.0) internal successors, (20817), 27 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:20,094 INFO L175 Difference]: Start difference. First operand has 445 places, 1762 transitions, 24887 flow. Second operand 26 states and 7811 transitions. [2023-09-01 12:05:20,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2260 transitions, 35918 flow [2023-09-01 12:05:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2260 transitions, 34807 flow, removed 405 selfloop flow, removed 9 redundant places. [2023-09-01 12:05:35,155 INFO L231 Difference]: Finished difference. Result has 469 places, 1806 transitions, 25847 flow [2023-09-01 12:05:35,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=24109, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25847, PETRI_PLACES=469, PETRI_TRANSITIONS=1806} [2023-09-01 12:05:35,157 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 439 predicate places. [2023-09-01 12:05:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1806 transitions, 25847 flow [2023-09-01 12:05:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 291.17391304347825) internal successors, (6697), 23 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:05:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:05:35,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:05:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:05:35,365 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)] === [2023-09-01 12:05:35,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:05:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1663316273, now seen corresponding path program 9 times [2023-09-01 12:05:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:05:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741359133] [2023-09-01 12:05:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:05:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:05:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:05:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:05:36,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:05:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741359133] [2023-09-01 12:05:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741359133] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:05:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702493188] [2023-09-01 12:05:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:05:36,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:05:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:05:36,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:05:36,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:05:36,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:05:36,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:05:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 12:05:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:05:36,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 99 [2023-09-01 12:05:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:05:36,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:05:37,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:05:37,484 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 164 treesize of output 92 [2023-09-01 12:05:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:05:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702493188] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:05:37,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:05:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 27 [2023-09-01 12:05:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099301124] [2023-09-01 12:05:37,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:05:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:05:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:05:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:05:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-09-01 12:05:40,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 771 [2023-09-01 12:05:40,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1806 transitions, 25847 flow. Second operand has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:05:40,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:05:40,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 771 [2023-09-01 12:05:40,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:06:07,801 INFO L130 PetriNetUnfolder]: 30907/52503 cut-off events. [2023-09-01 12:06:07,802 INFO L131 PetriNetUnfolder]: For 919683/919683 co-relation queries the response was YES. [2023-09-01 12:06:09,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373771 conditions, 52503 events. 30907/52503 cut-off events. For 919683/919683 co-relation queries the response was YES. Maximal size of possible extension queue 2818. Compared 475643 event pairs, 3029 based on Foata normal form. 39/46586 useless extension candidates. Maximal degree in co-relation 373590. Up to 23670 conditions per place. [2023-09-01 12:06:09,673 INFO L137 encePairwiseOnDemand]: 760/771 looper letters, 1976 selfloop transitions, 1471 changer transitions 206/3653 dead transitions. [2023-09-01 12:06:09,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 3653 transitions, 58010 flow [2023-09-01 12:06:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 12:06:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 12:06:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 14009 transitions. [2023-09-01 12:06:09,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633981841763943 [2023-09-01 12:06:09,809 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 14009 transitions. [2023-09-01 12:06:09,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 14009 transitions. [2023-09-01 12:06:09,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:06:09,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 14009 transitions. [2023-09-01 12:06:09,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 280.18) internal successors, (14009), 50 states have internal predecessors, (14009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:06:09,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:06:09,876 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 771.0) internal successors, (39321), 51 states have internal predecessors, (39321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:06:09,877 INFO L175 Difference]: Start difference. First operand has 469 places, 1806 transitions, 25847 flow. Second operand 50 states and 14009 transitions. [2023-09-01 12:06:09,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 3653 transitions, 58010 flow [2023-09-01 12:06:30,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 3653 transitions, 57136 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-09-01 12:06:30,090 INFO L231 Difference]: Finished difference. Result has 532 places, 2572 transitions, 42344 flow [2023-09-01 12:06:30,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=25442, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=42344, PETRI_PLACES=532, PETRI_TRANSITIONS=2572} [2023-09-01 12:06:30,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 502 predicate places. [2023-09-01 12:06:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 2572 transitions, 42344 flow [2023-09-01 12:06:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 275.4642857142857) internal successors, (7713), 28 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:06:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:06:30,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:06:30,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:06:30,300 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,SelfDestructingSolverStorable12 [2023-09-01 12:06:30,300 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)] === [2023-09-01 12:06:30,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:06:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash -886775817, now seen corresponding path program 10 times [2023-09-01 12:06:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:06:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984829184] [2023-09-01 12:06:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:06:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:06:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:06:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:06:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:06:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984829184] [2023-09-01 12:06:31,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984829184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:06:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679920055] [2023-09-01 12:06:31,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:06:31,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:06:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:06:31,070 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:06:31,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:06:31,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:06:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:06:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:06:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:06:31,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2023-09-01 12:06:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:06:31,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:06:32,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:06:32,547 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 223 treesize of output 119 [2023-09-01 12:06:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:06:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679920055] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:06:32,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:06:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-09-01 12:06:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938573511] [2023-09-01 12:06:32,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:06:32,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:06:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:06:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:06:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:06:34,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 771 [2023-09-01 12:06:34,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 2572 transitions, 42344 flow. Second operand has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:06:34,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:06:34,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 771 [2023-09-01 12:06:34,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:07:18,802 INFO L130 PetriNetUnfolder]: 40045/67977 cut-off events. [2023-09-01 12:07:18,803 INFO L131 PetriNetUnfolder]: For 1557291/1557291 co-relation queries the response was YES. [2023-09-01 12:07:20,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544806 conditions, 67977 events. 40045/67977 cut-off events. For 1557291/1557291 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 633313 event pairs, 7564 based on Foata normal form. 50/61383 useless extension candidates. Maximal degree in co-relation 544599. Up to 25347 conditions per place. [2023-09-01 12:07:21,263 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 1774 selfloop transitions, 1935 changer transitions 127/3836 dead transitions. [2023-09-01 12:07:21,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 3836 transitions, 71516 flow [2023-09-01 12:07:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:07:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:07:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 9162 transitions. [2023-09-01 12:07:21,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333124137065394 [2023-09-01 12:07:21,269 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 9162 transitions. [2023-09-01 12:07:21,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 9162 transitions. [2023-09-01 12:07:21,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:07:21,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 9162 transitions. [2023-09-01 12:07:21,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 295.5483870967742) internal successors, (9162), 31 states have internal predecessors, (9162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:21,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:21,296 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 771.0) internal successors, (24672), 32 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:21,296 INFO L175 Difference]: Start difference. First operand has 532 places, 2572 transitions, 42344 flow. Second operand 31 states and 9162 transitions. [2023-09-01 12:07:21,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 3836 transitions, 71516 flow [2023-09-01 12:09:32,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 3836 transitions, 68581 flow, removed 1450 selfloop flow, removed 12 redundant places. [2023-09-01 12:09:32,377 INFO L231 Difference]: Finished difference. Result has 549 places, 3115 transitions, 56418 flow [2023-09-01 12:09:32,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=40895, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=56418, PETRI_PLACES=549, PETRI_TRANSITIONS=3115} [2023-09-01 12:09:32,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 519 predicate places. [2023-09-01 12:09:32,379 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 3115 transitions, 56418 flow [2023-09-01 12:09:32,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 288.8181818181818) internal successors, (6354), 22 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:09:32,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:09:32,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:09:32,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:09:32,580 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,SelfDestructingSolverStorable13 [2023-09-01 12:09:32,581 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)] === [2023-09-01 12:09:32,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:09:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1934763223, now seen corresponding path program 11 times [2023-09-01 12:09:32,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:09:32,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594088741] [2023-09-01 12:09:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:09:32,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:09:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:09:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:09:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:09:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594088741] [2023-09-01 12:09:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594088741] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:09:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547229323] [2023-09-01 12:09:33,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:09:33,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:09:33,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:09:33,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:09:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:09:33,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:09:33,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:09:33,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 12:09:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:09:33,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 84 [2023-09-01 12:09:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:09:33,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:09:34,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:09:34,940 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 108 treesize of output 68 [2023-09-01 12:09:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:09:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547229323] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:09:35,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:09:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-09-01 12:09:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936713368] [2023-09-01 12:09:35,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:09:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 12:09:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:09:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 12:09:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-09-01 12:09:38,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 771 [2023-09-01 12:09:38,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 3115 transitions, 56418 flow. Second operand has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:09:38,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:09:38,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 771 [2023-09-01 12:09:38,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:10:39,991 INFO L130 PetriNetUnfolder]: 42508/75246 cut-off events. [2023-09-01 12:10:39,992 INFO L131 PetriNetUnfolder]: For 1693035/1693035 co-relation queries the response was YES. [2023-09-01 12:10:42,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566404 conditions, 75246 events. 42508/75246 cut-off events. For 1693035/1693035 co-relation queries the response was YES. Maximal size of possible extension queue 4199. Compared 751658 event pairs, 8773 based on Foata normal form. 23/69733 useless extension candidates. Maximal degree in co-relation 566190. Up to 30023 conditions per place. [2023-09-01 12:10:43,006 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2160 selfloop transitions, 1926 changer transitions 57/4143 dead transitions. [2023-09-01 12:10:43,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 4143 transitions, 80468 flow [2023-09-01 12:10:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 12:10:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 12:10:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 9844 transitions. [2023-09-01 12:10:43,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647952566240504 [2023-09-01 12:10:43,013 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 9844 transitions. [2023-09-01 12:10:43,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 9844 transitions. [2023-09-01 12:10:43,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:10:43,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 9844 transitions. [2023-09-01 12:10:43,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 281.25714285714287) internal successors, (9844), 35 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:10:43,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:10:43,037 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 771.0) internal successors, (27756), 36 states have internal predecessors, (27756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:10:43,037 INFO L175 Difference]: Start difference. First operand has 549 places, 3115 transitions, 56418 flow. Second operand 35 states and 9844 transitions. [2023-09-01 12:10:43,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 4143 transitions, 80468 flow [2023-09-01 12:12:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 4143 transitions, 78641 flow, removed 842 selfloop flow, removed 10 redundant places. [2023-09-01 12:12:21,023 INFO L231 Difference]: Finished difference. Result has 588 places, 3517 transitions, 68675 flow [2023-09-01 12:12:21,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54885, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=68675, PETRI_PLACES=588, PETRI_TRANSITIONS=3517} [2023-09-01 12:12:21,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 558 predicate places. [2023-09-01 12:12:21,025 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 3517 transitions, 68675 flow [2023-09-01 12:12:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 274.34615384615387) internal successors, (7133), 26 states have internal predecessors, (7133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:12:21,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:12:21,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:12:21,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:12:21,227 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,SelfDestructingSolverStorable14 [2023-09-01 12:12:21,227 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)] === [2023-09-01 12:12:21,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:12:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 423070181, now seen corresponding path program 12 times [2023-09-01 12:12:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:12:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646270869] [2023-09-01 12:12:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:12:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:12:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:12:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:12:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:12:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646270869] [2023-09-01 12:12:22,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646270869] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:12:22,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057554253] [2023-09-01 12:12:22,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:12:22,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:12:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:12:22,028 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:12:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:12:22,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:12:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:12:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 12:12:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:12:22,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 126 [2023-09-01 12:12:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:12:23,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:12:23,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:12:23,870 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 247 treesize of output 143 [2023-09-01 12:12:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 12:12:24,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057554253] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:12:24,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:12:24,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-09-01 12:12:24,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816776297] [2023-09-01 12:12:24,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:12:24,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:12:24,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:12:24,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:12:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-09-01 12:12:26,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 771 [2023-09-01 12:12:26,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 3517 transitions, 68675 flow. Second operand has 28 states, 28 states have (on average 273.14285714285717) internal successors, (7648), 28 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:12:26,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:12:26,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 771 [2023-09-01 12:12:26,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:13:39,558 INFO L130 PetriNetUnfolder]: 44577/79238 cut-off events. [2023-09-01 12:13:39,558 INFO L131 PetriNetUnfolder]: For 1968419/1968419 co-relation queries the response was YES. [2023-09-01 12:13:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618479 conditions, 79238 events. 44577/79238 cut-off events. For 1968419/1968419 co-relation queries the response was YES. Maximal size of possible extension queue 4485. Compared 799466 event pairs, 9902 based on Foata normal form. 40/74696 useless extension candidates. Maximal degree in co-relation 618251. Up to 28015 conditions per place. [2023-09-01 12:13:42,606 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 2425 selfloop transitions, 2039 changer transitions 90/4554 dead transitions. [2023-09-01 12:13:42,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 4554 transitions, 92727 flow [2023-09-01 12:13:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-09-01 12:13:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-09-01 12:13:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 17053 transitions. [2023-09-01 12:13:42,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36259063171099915 [2023-09-01 12:13:42,750 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 17053 transitions. [2023-09-01 12:13:42,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 17053 transitions. [2023-09-01 12:13:42,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:13:42,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 17053 transitions. [2023-09-01 12:13:42,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 279.55737704918033) internal successors, (17053), 61 states have internal predecessors, (17053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:42,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:42,801 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 771.0) internal successors, (47802), 62 states have internal predecessors, (47802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:13:42,801 INFO L175 Difference]: Start difference. First operand has 588 places, 3517 transitions, 68675 flow. Second operand 61 states and 17053 transitions. [2023-09-01 12:13:42,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 4554 transitions, 92727 flow Killed by 15