./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.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/unroll-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --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 14:59:07,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:59:07,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:59:07,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:59:07,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:59:07,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:59:07,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:59:07,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:59:07,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:59:07,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:59:07,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:59:07,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:59:07,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:59:07,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:59:07,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:59:07,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:59:07,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:59:07,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:59:07,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:59:07,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:59:07,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:59:07,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:59:07,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:59:07,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:59:07,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:59:07,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:59:07,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:59:07,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:59:07,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:59:07,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:59:07,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:59:07,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:59:07,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:59:07,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:59:07,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:59:07,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:59:07,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:59:07,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:59:07,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:59:07,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:59:07,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:59:07,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:59:07,728 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:59:07,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:59:07,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:59:07,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:59:07,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:59:07,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:59:07,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:59:07,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:59:07,732 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:59:07,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:59:07,733 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:59:07,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:59:07,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:59:07,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:59:07,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:59:07,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:59:07,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:59:07,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:59:07,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:59:07,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:59:07,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:59:07,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:59:07,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:59:07,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:59:07,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:59:07,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:59:07,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:59:07,737 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:59:07,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:59:07,737 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:59:07,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:59:08,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:59:08,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:59:08,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:59:08,074 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:59:08,075 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:59:08,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-09-01 14:59:09,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:59:09,412 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:59:09,413 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-09-01 14:59:09,419 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/173fb63cd/bbc63c9a37ca4d52b4eec6df552ae7d6/FLAGa3fc08782 [2023-09-01 14:59:09,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/173fb63cd/bbc63c9a37ca4d52b4eec6df552ae7d6 [2023-09-01 14:59:09,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:59:09,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:59:09,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:59:09,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:59:09,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:59:09,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2234dba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09, skipping insertion in model container [2023-09-01 14:59:09,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:59:09,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:59:09,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c[2474,2487] [2023-09-01 14:59:09,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:59:09,673 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:59:09,711 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c[2474,2487] [2023-09-01 14:59:09,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:59:09,729 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:59:09,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09 WrapperNode [2023-09-01 14:59:09,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:59:09,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:59:09,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:59:09,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:59:09,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,784 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-09-01 14:59:09,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:59:09,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:59:09,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:59:09,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:59:09,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:59:09,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:59:09,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:59:09,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:59:09,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (1/1) ... [2023-09-01 14:59:09,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:59:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:09,882 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 14:59:09,899 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 14:59:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:59:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:59:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:59:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:59:09,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:59:09,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:59:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:59:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:59:09,928 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 14:59:10,031 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:59:10,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:59:10,342 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:59:10,349 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:59:10,351 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:59:10,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:59:10 BoogieIcfgContainer [2023-09-01 14:59:10,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:59:10,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:59:10,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:59:10,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:59:10,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:59:09" (1/3) ... [2023-09-01 14:59:10,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:59:10, skipping insertion in model container [2023-09-01 14:59:10,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:59:09" (2/3) ... [2023-09-01 14:59:10,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:59:10, skipping insertion in model container [2023-09-01 14:59:10,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:59:10" (3/3) ... [2023-09-01 14:59:10,366 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-09-01 14:59:10,374 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:59:10,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:59:10,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:59:10,383 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:59:10,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:59:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 348 flow [2023-09-01 14:59:10,641 INFO L130 PetriNetUnfolder]: 15/164 cut-off events. [2023-09-01 14:59:10,641 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:59:10,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 15/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 14:59:10,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 166 transitions, 348 flow [2023-09-01 14:59:10,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 324 flow [2023-09-01 14:59:10,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:59:10,669 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 324 flow [2023-09-01 14:59:10,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 324 flow [2023-09-01 14:59:10,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 324 flow [2023-09-01 14:59:10,724 INFO L130 PetriNetUnfolder]: 15/156 cut-off events. [2023-09-01 14:59:10,727 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:59:10,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 15/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-09-01 14:59:10,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-09-01 14:59:15,178 INFO L134 LiptonReduction]: Checked pairs total: 2696 [2023-09-01 14:59:15,179 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-09-01 14:59:15,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:59:15,194 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;@2a727f8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:59:15,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:59:15,201 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:59:15,201 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:59:15,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:15,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:15,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:15,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash -526169532, now seen corresponding path program 1 times [2023-09-01 14:59:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400425471] [2023-09-01 14:59:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:15,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:15,599 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 14:59:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400425471] [2023-09-01 14:59:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400425471] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:15,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:15,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:59:15,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623871024] [2023-09-01 14:59:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:59:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:59:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:59:15,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-09-01 14:59:15,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:15,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:15,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-09-01 14:59:15,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:15,733 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-09-01 14:59:15,734 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 14:59:15,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-09-01 14:59:15,736 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 14:59:15,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 14:59:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:59:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:59:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-09-01 14:59:15,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43707973102785785 [2023-09-01 14:59:15,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-09-01 14:59:15,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-09-01 14:59:15,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:15,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-09-01 14:59:15,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:15,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:15,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:15,778 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 455 transitions. [2023-09-01 14:59:15,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 14:59:15,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:59:15,782 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 14:59:15,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 14:59:15,787 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 14:59:15,787 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 14:59:15,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:15,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:15,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:15,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:59:15,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:15,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1480683613, now seen corresponding path program 1 times [2023-09-01 14:59:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:15,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294616243] [2023-09-01 14:59:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294616243] [2023-09-01 14:59:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294616243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:16,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118065772] [2023-09-01 14:59:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:16,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:16,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-09-01 14:59:16,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:16,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-09-01 14:59:16,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:16,245 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-09-01 14:59:16,245 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:59:16,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-09-01 14:59:16,250 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-09-01 14:59:16,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-09-01 14:59:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:59:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:59:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 730 transitions. [2023-09-01 14:59:16,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-09-01 14:59:16,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 730 transitions. [2023-09-01 14:59:16,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 730 transitions. [2023-09-01 14:59:16,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:16,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 730 transitions. [2023-09-01 14:59:16,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,261 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 730 transitions. [2023-09-01 14:59:16,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-09-01 14:59:16,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:59:16,263 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-09-01 14:59:16,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-09-01 14:59:16,264 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-09-01 14:59:16,264 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-09-01 14:59:16,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:16,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:16,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:59:16,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:16,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 182747709, now seen corresponding path program 2 times [2023-09-01 14:59:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837876071] [2023-09-01 14:59:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:16,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:16,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837876071] [2023-09-01 14:59:16,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837876071] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:16,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:16,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:16,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617866845] [2023-09-01 14:59:16,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:16,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:16,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-09-01 14:59:16,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:16,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-09-01 14:59:16,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:16,692 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-09-01 14:59:16,692 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-09-01 14:59:16,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 606 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-09-01 14:59:16,694 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-09-01 14:59:16,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-09-01 14:59:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:59:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:59:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2023-09-01 14:59:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-09-01 14:59:16,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2023-09-01 14:59:16,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2023-09-01 14:59:16,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:16,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2023-09-01 14:59:16,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,705 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 876 transitions. [2023-09-01 14:59:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-09-01 14:59:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 14:59:16,708 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-09-01 14:59:16,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-09-01 14:59:16,708 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-09-01 14:59:16,709 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-09-01 14:59:16,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:16,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:16,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:59:16,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:16,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:16,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1504917559, now seen corresponding path program 3 times [2023-09-01 14:59:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699540410] [2023-09-01 14:59:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:16,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:16,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699540410] [2023-09-01 14:59:16,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699540410] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:16,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:16,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485760952] [2023-09-01 14:59:16,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:16,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:16,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-09-01 14:59:16,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:16,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:16,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-09-01 14:59:16,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:17,044 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-09-01 14:59:17,044 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-09-01 14:59:17,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-09-01 14:59:17,046 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-09-01 14:59:17,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-09-01 14:59:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:59:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:59:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-09-01 14:59:17,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41844380403458215 [2023-09-01 14:59:17,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-09-01 14:59:17,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-09-01 14:59:17,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:17,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-09-01 14:59:17,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,055 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,056 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 726 transitions. [2023-09-01 14:59:17,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-09-01 14:59:17,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-09-01 14:59:17,059 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-09-01 14:59:17,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-09-01 14:59:17,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-09-01 14:59:17,061 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-09-01 14:59:17,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:17,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:17,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:59:17,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:17,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:17,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1764589935, now seen corresponding path program 4 times [2023-09-01 14:59:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047180593] [2023-09-01 14:59:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:17,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047180593] [2023-09-01 14:59:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047180593] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:17,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520882582] [2023-09-01 14:59:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:17,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-09-01 14:59:17,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:17,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-09-01 14:59:17,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:17,381 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-09-01 14:59:17,382 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-09-01 14:59:17,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-09-01 14:59:17,384 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-09-01 14:59:17,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-09-01 14:59:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:59:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:59:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-09-01 14:59:17,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414985590778098 [2023-09-01 14:59:17,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-09-01 14:59:17,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-09-01 14:59:17,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:17,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-09-01 14:59:17,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,393 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 720 transitions. [2023-09-01 14:59:17,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-09-01 14:59:17,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 14:59:17,397 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-09-01 14:59:17,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-09-01 14:59:17,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-09-01 14:59:17,398 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-09-01 14:59:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:17,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:17,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:59:17,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:17,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:17,400 INFO L85 PathProgramCache]: Analyzing trace with hash -467573743, now seen corresponding path program 5 times [2023-09-01 14:59:17,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:17,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842623657] [2023-09-01 14:59:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:17,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:17,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842623657] [2023-09-01 14:59:17,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842623657] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:17,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:17,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799553043] [2023-09-01 14:59:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:17,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:17,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-09-01 14:59:17,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:17,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-09-01 14:59:17,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:17,661 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-09-01 14:59:17,661 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-09-01 14:59:17,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-09-01 14:59:17,664 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-09-01 14:59:17,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-09-01 14:59:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:59:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:59:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-09-01 14:59:17,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201729106628242 [2023-09-01 14:59:17,666 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-09-01 14:59:17,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-09-01 14:59:17,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:17,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-09-01 14:59:17,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,671 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,672 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 729 transitions. [2023-09-01 14:59:17,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-09-01 14:59:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 14:59:17,677 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-09-01 14:59:17,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-09-01 14:59:17,678 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-09-01 14:59:17,678 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-09-01 14:59:17,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:17,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:17,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:59:17,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:17,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -263674133, now seen corresponding path program 6 times [2023-09-01 14:59:17,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:17,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537179088] [2023-09-01 14:59:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:17,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:17,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537179088] [2023-09-01 14:59:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537179088] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:59:17,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:59:17,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:59:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708300458] [2023-09-01 14:59:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:59:17,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:59:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:59:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:59:17,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-09-01 14:59:17,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:17,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-09-01 14:59:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:17,932 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-09-01 14:59:17,932 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-09-01 14:59:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-09-01 14:59:17,934 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-09-01 14:59:17,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-09-01 14:59:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:59:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:59:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-09-01 14:59:17,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41786743515850144 [2023-09-01 14:59:17,937 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-09-01 14:59:17,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-09-01 14:59:17,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:17,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-09-01 14:59:17,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,942 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 725 transitions. [2023-09-01 14:59:17,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-09-01 14:59:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 14:59:17,947 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-09-01 14:59:17,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-09-01 14:59:17,948 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-09-01 14:59:17,948 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-09-01 14:59:17,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:17,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:17,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:59:17,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:17,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1171572305, now seen corresponding path program 1 times [2023-09-01 14:59:17,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:17,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659115338] [2023-09-01 14:59:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:18,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659115338] [2023-09-01 14:59:18,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659115338] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021450262] [2023-09-01 14:59:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:18,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:59:18,332 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 14:59:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:59:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:18,819 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 85 treesize of output 77 [2023-09-01 14:59:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:18,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:19,287 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:59:19,287 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 19 treesize of output 7 [2023-09-01 14:59:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021450262] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:19,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:19,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-09-01 14:59:19,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104392614] [2023-09-01 14:59:19,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:19,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:19,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:19,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 347 [2023-09-01 14:59:19,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:19,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:19,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 347 [2023-09-01 14:59:19,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:20,293 INFO L130 PetriNetUnfolder]: 236/417 cut-off events. [2023-09-01 14:59:20,294 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2023-09-01 14:59:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 417 events. 236/417 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 10 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1719. Up to 113 conditions per place. [2023-09-01 14:59:20,297 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 68 selfloop transitions, 53 changer transitions 4/125 dead transitions. [2023-09-01 14:59:20,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 995 flow [2023-09-01 14:59:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:59:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:59:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1727 transitions. [2023-09-01 14:59:20,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38284194191975174 [2023-09-01 14:59:20,302 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1727 transitions. [2023-09-01 14:59:20,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1727 transitions. [2023-09-01 14:59:20,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:20,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1727 transitions. [2023-09-01 14:59:20,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.84615384615384) internal successors, (1727), 13 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,314 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,314 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 13 states and 1727 transitions. [2023-09-01 14:59:20,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 995 flow [2023-09-01 14:59:20,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 933 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 14:59:20,321 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 676 flow [2023-09-01 14:59:20,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=676, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-09-01 14:59:20,322 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-09-01 14:59:20,322 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 676 flow [2023-09-01 14:59:20,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:20,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:20,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:20,332 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 14:59:20,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:20,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:20,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222474, now seen corresponding path program 1 times [2023-09-01 14:59:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494591237] [2023-09-01 14:59:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494591237] [2023-09-01 14:59:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494591237] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122290178] [2023-09-01 14:59:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:20,733 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 14:59:20,754 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 14:59:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:59:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:21,257 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-09-01 14:59:21,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 115 [2023-09-01 14:59:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:21,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:21,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:21,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 74 [2023-09-01 14:59:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:22,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122290178] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:22,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:22,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-09-01 14:59:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048012203] [2023-09-01 14:59:22,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:22,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:59:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:59:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:59:23,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-09-01 14:59:23,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 676 flow. Second operand has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:23,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:23,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-09-01 14:59:23,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:24,150 INFO L130 PetriNetUnfolder]: 375/684 cut-off events. [2023-09-01 14:59:24,150 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-09-01 14:59:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 684 events. 375/684 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3166 event pairs, 37 based on Foata normal form. 5/631 useless extension candidates. Maximal degree in co-relation 3069. Up to 232 conditions per place. [2023-09-01 14:59:24,156 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 76 selfloop transitions, 56 changer transitions 56/188 dead transitions. [2023-09-01 14:59:24,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1790 flow [2023-09-01 14:59:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:59:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:59:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2576 transitions. [2023-09-01 14:59:24,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374377783599686 [2023-09-01 14:59:24,164 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2576 transitions. [2023-09-01 14:59:24,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2576 transitions. [2023-09-01 14:59:24,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:24,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2576 transitions. [2023-09-01 14:59:24,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.0909090909091) internal successors, (2576), 22 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:24,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:24,181 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:24,181 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 676 flow. Second operand 22 states and 2576 transitions. [2023-09-01 14:59:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1790 flow [2023-09-01 14:59:24,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 188 transitions, 1618 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-09-01 14:59:24,196 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 924 flow [2023-09-01 14:59:24,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=924, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-09-01 14:59:24,197 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-09-01 14:59:24,198 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 924 flow [2023-09-01 14:59:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:24,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:24,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:59:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-09-01 14:59:24,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:24,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -990791569, now seen corresponding path program 2 times [2023-09-01 14:59:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591375983] [2023-09-01 14:59:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591375983] [2023-09-01 14:59:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591375983] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675707358] [2023-09-01 14:59:24,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:59:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:24,728 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 14:59:24,753 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 14:59:24,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:24,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:59:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:24,998 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 85 treesize of output 77 [2023-09-01 14:59:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:25,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:25,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:25,329 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 68 treesize of output 53 [2023-09-01 14:59:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675707358] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:25,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-09-01 14:59:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061034065] [2023-09-01 14:59:25,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:25,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-09-01 14:59:25,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:25,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:25,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-09-01 14:59:25,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:26,403 INFO L130 PetriNetUnfolder]: 323/577 cut-off events. [2023-09-01 14:59:26,403 INFO L131 PetriNetUnfolder]: For 2303/2303 co-relation queries the response was YES. [2023-09-01 14:59:26,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 577 events. 323/577 cut-off events. For 2303/2303 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2495 event pairs, 5 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2679. Up to 239 conditions per place. [2023-09-01 14:59:26,408 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 69 selfloop transitions, 74 changer transitions 4/147 dead transitions. [2023-09-01 14:59:26,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1488 flow [2023-09-01 14:59:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:59:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:59:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1729 transitions. [2023-09-01 14:59:26,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38328530259365995 [2023-09-01 14:59:26,413 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1729 transitions. [2023-09-01 14:59:26,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1729 transitions. [2023-09-01 14:59:26,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:26,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1729 transitions. [2023-09-01 14:59:26,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.0) internal successors, (1729), 13 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:26,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:26,424 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:26,425 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 924 flow. Second operand 13 states and 1729 transitions. [2023-09-01 14:59:26,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1488 flow [2023-09-01 14:59:26,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1364 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-09-01 14:59:26,441 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1211 flow [2023-09-01 14:59:26,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1211, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-09-01 14:59:26,442 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-09-01 14:59:26,442 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1211 flow [2023-09-01 14:59:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:26,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:26,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:26,449 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 14:59:26,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:26,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:26,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1059349345, now seen corresponding path program 3 times [2023-09-01 14:59:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:26,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818922959] [2023-09-01 14:59:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:26,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:26,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818922959] [2023-09-01 14:59:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818922959] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:26,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817291144] [2023-09-01 14:59:26,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:59:26,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:26,908 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 14:59:26,910 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 14:59:26,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:59:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 14:59:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:27,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-09-01 14:59:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:27,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:27,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:27,372 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 128 [2023-09-01 14:59:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817291144] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:27,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:27,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-09-01 14:59:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246523477] [2023-09-01 14:59:27,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:27,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:59:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:59:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:59:27,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-09-01 14:59:27,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1211 flow. Second operand has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:27,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:27,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-09-01 14:59:27,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:28,292 INFO L130 PetriNetUnfolder]: 389/752 cut-off events. [2023-09-01 14:59:28,292 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 14:59:28,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 752 events. 389/752 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3828 event pairs, 4 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3548. Up to 216 conditions per place. [2023-09-01 14:59:28,299 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 82 selfloop transitions, 102 changer transitions 20/204 dead transitions. [2023-09-01 14:59:28,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2264 flow [2023-09-01 14:59:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:59:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:59:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2252 transitions. [2023-09-01 14:59:28,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817596202746228 [2023-09-01 14:59:28,306 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2252 transitions. [2023-09-01 14:59:28,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2252 transitions. [2023-09-01 14:59:28,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:28,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2252 transitions. [2023-09-01 14:59:28,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.47058823529412) internal successors, (2252), 17 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:28,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:28,324 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:28,324 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1211 flow. Second operand 17 states and 2252 transitions. [2023-09-01 14:59:28,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2264 flow [2023-09-01 14:59:28,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 204 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-09-01 14:59:28,346 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1713 flow [2023-09-01 14:59:28,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1713, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2023-09-01 14:59:28,347 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-09-01 14:59:28,347 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1713 flow [2023-09-01 14:59:28,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:28,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:28,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:28,356 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 14:59:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:28,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:28,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1724646899, now seen corresponding path program 4 times [2023-09-01 14:59:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321837760] [2023-09-01 14:59:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321837760] [2023-09-01 14:59:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321837760] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021915878] [2023-09-01 14:59:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:59:28,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:28,884 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 14:59:28,900 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 14:59:28,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:59:28,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:59:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:29,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:59:29,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:59:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:59:29,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 14:59:29,264 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 85 treesize of output 77 [2023-09-01 14:59:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:29,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:29,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:29,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-09-01 14:59:29,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:29,709 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 414 treesize of output 326 [2023-09-01 14:59:29,715 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 72 treesize of output 60 [2023-09-01 14:59:29,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:29,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 29 [2023-09-01 14:59:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021915878] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:29,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-09-01 14:59:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450843618] [2023-09-01 14:59:29,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:59:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:59:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2023-09-01 14:59:30,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-09-01 14:59:30,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1713 flow. Second operand has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:30,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:30,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-09-01 14:59:30,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:31,623 INFO L130 PetriNetUnfolder]: 476/919 cut-off events. [2023-09-01 14:59:31,624 INFO L131 PetriNetUnfolder]: For 5228/5228 co-relation queries the response was YES. [2023-09-01 14:59:31,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 919 events. 476/919 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4923 event pairs, 11 based on Foata normal form. 4/922 useless extension candidates. Maximal degree in co-relation 4900. Up to 213 conditions per place. [2023-09-01 14:59:31,633 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 97 selfloop transitions, 139 changer transitions 10/246 dead transitions. [2023-09-01 14:59:31,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3021 flow [2023-09-01 14:59:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:59:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:59:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2139 transitions. [2023-09-01 14:59:31,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424591738712776 [2023-09-01 14:59:31,641 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2139 transitions. [2023-09-01 14:59:31,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2139 transitions. [2023-09-01 14:59:31,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:31,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2139 transitions. [2023-09-01 14:59:31,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.83333333333333) internal successors, (2139), 18 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:31,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:31,655 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:31,655 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1713 flow. Second operand 18 states and 2139 transitions. [2023-09-01 14:59:31,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3021 flow [2023-09-01 14:59:31,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2776 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-09-01 14:59:31,698 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 2454 flow [2023-09-01 14:59:31,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2454, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2023-09-01 14:59:31,700 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-09-01 14:59:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 2454 flow [2023-09-01 14:59:31,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:31,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:31,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:31,706 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 14:59:31,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 14:59:31,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:31,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1294223865, now seen corresponding path program 5 times [2023-09-01 14:59:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:31,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301613547] [2023-09-01 14:59:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:31,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:59:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301613547] [2023-09-01 14:59:32,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301613547] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:32,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905184435] [2023-09-01 14:59:32,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:59:32,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:32,205 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 14:59:32,228 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 14:59:32,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:32,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:59:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:32,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:59:32,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:59:32,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:59:32,515 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 85 treesize of output 77 [2023-09-01 14:59:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:35,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:59:35,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-09-01 14:59:35,106 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:59:35,106 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 94 treesize of output 81 [2023-09-01 14:59:35,113 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:59:35,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 54 [2023-09-01 14:59:35,121 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 14:59:35,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 20 [2023-09-01 14:59:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:59:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905184435] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:35,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-09-01 14:59:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325744646] [2023-09-01 14:59:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:35,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:59:35,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:59:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=213, Unknown=5, NotChecked=0, Total=306 [2023-09-01 14:59:37,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:39,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:41,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:59:42,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-09-01 14:59:42,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 2454 flow. Second operand has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:42,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:42,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-09-01 14:59:42,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:42,808 INFO L130 PetriNetUnfolder]: 528/1033 cut-off events. [2023-09-01 14:59:42,808 INFO L131 PetriNetUnfolder]: For 7788/7788 co-relation queries the response was YES. [2023-09-01 14:59:42,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 1033 events. 528/1033 cut-off events. For 7788/7788 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5706 event pairs, 73 based on Foata normal form. 6/1038 useless extension candidates. Maximal degree in co-relation 5733. Up to 792 conditions per place. [2023-09-01 14:59:42,818 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 174 selfloop transitions, 55 changer transitions 11/240 dead transitions. [2023-09-01 14:59:42,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3429 flow [2023-09-01 14:59:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 14:59:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 14:59:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-09-01 14:59:42,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287223823246878 [2023-09-01 14:59:42,821 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-09-01 14:59:42,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-09-01 14:59:42,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:42,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-09-01 14:59:42,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:42,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:42,828 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:42,828 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 2454 flow. Second operand 12 states and 1196 transitions. [2023-09-01 14:59:42,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3429 flow [2023-09-01 14:59:42,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 3362 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-09-01 14:59:42,875 INFO L231 Difference]: Finished difference. Result has 126 places, 201 transitions, 2896 flow [2023-09-01 14:59:42,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2896, PETRI_PLACES=126, PETRI_TRANSITIONS=201} [2023-09-01 14:59:42,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-09-01 14:59:42,876 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 201 transitions, 2896 flow [2023-09-01 14:59:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:42,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:42,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:42,882 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 14:59:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:43,082 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:43,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash -469526207, now seen corresponding path program 2 times [2023-09-01 14:59:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548523513] [2023-09-01 14:59:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548523513] [2023-09-01 14:59:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548523513] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587921399] [2023-09-01 14:59:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:59:43,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:43,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:43,214 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 14:59:43,216 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 14:59:43,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:43,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587921399] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:43,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 14:59:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031848996] [2023-09-01 14:59:43,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 14:59:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 14:59:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-09-01 14:59:43,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:43,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 201 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:43,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:43,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:43,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:44,657 INFO L130 PetriNetUnfolder]: 605/1185 cut-off events. [2023-09-01 14:59:44,658 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-09-01 14:59:44,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 1185 events. 605/1185 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6884 event pairs, 70 based on Foata normal form. 28/1212 useless extension candidates. Maximal degree in co-relation 6674. Up to 357 conditions per place. [2023-09-01 14:59:44,671 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-09-01 14:59:44,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 4219 flow [2023-09-01 14:59:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:59:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:59:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2425 transitions. [2023-09-01 14:59:44,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110866248516698 [2023-09-01 14:59:44,676 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2425 transitions. [2023-09-01 14:59:44,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2425 transitions. [2023-09-01 14:59:44,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:44,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2425 transitions. [2023-09-01 14:59:44,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.64705882352942) internal successors, (2425), 17 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:44,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:44,686 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:44,687 INFO L175 Difference]: Start difference. First operand has 126 places, 201 transitions, 2896 flow. Second operand 17 states and 2425 transitions. [2023-09-01 14:59:44,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 4219 flow [2023-09-01 14:59:44,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 302 transitions, 4167 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-09-01 14:59:44,753 INFO L231 Difference]: Finished difference. Result has 146 places, 235 transitions, 3664 flow [2023-09-01 14:59:44,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3664, PETRI_PLACES=146, PETRI_TRANSITIONS=235} [2023-09-01 14:59:44,754 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-09-01 14:59:44,755 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 235 transitions, 3664 flow [2023-09-01 14:59:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:44,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:44,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:44,766 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 14:59:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:44,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:44,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1106126361, now seen corresponding path program 3 times [2023-09-01 14:59:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:44,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938637776] [2023-09-01 14:59:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938637776] [2023-09-01 14:59:45,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938637776] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006753936] [2023-09-01 14:59:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:59:45,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:45,151 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 14:59:45,153 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 14:59:45,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:59:45,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:45,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:45,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006753936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:45,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:59:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489840083] [2023-09-01 14:59:45,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:45,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:45,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 235 transitions, 3664 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:45,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:45,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:45,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:46,549 INFO L130 PetriNetUnfolder]: 700/1350 cut-off events. [2023-09-01 14:59:46,549 INFO L131 PetriNetUnfolder]: For 12122/12122 co-relation queries the response was YES. [2023-09-01 14:59:46,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1350 events. 700/1350 cut-off events. For 12122/12122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7922 event pairs, 124 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 8400. Up to 625 conditions per place. [2023-09-01 14:59:46,561 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 211 selfloop transitions, 115 changer transitions 1/327 dead transitions. [2023-09-01 14:59:46,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 327 transitions, 5104 flow [2023-09-01 14:59:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 14:59:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 14:59:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-09-01 14:59:46,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138328530259366 [2023-09-01 14:59:46,565 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-09-01 14:59:46,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-09-01 14:59:46,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:46,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-09-01 14:59:46,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:46,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:46,575 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:46,575 INFO L175 Difference]: Start difference. First operand has 146 places, 235 transitions, 3664 flow. Second operand 15 states and 2154 transitions. [2023-09-01 14:59:46,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 327 transitions, 5104 flow [2023-09-01 14:59:46,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 327 transitions, 4961 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-09-01 14:59:46,657 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 4366 flow [2023-09-01 14:59:46,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4366, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2023-09-01 14:59:46,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-09-01 14:59:46,658 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 4366 flow [2023-09-01 14:59:46,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:46,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:46,658 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:46,670 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 14:59:46,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:59:46,864 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:46,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1138105375, now seen corresponding path program 4 times [2023-09-01 14:59:46,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:46,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390697877] [2023-09-01 14:59:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:47,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390697877] [2023-09-01 14:59:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390697877] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:47,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887087721] [2023-09-01 14:59:47,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:59:47,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:47,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:47,094 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 14:59:47,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:59:47,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:59:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:47,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:47,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887087721] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:47,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:47,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:59:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048025874] [2023-09-01 14:59:47,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:47,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:47,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 4366 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:47,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:47,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:47,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:48,453 INFO L130 PetriNetUnfolder]: 679/1327 cut-off events. [2023-09-01 14:59:48,453 INFO L131 PetriNetUnfolder]: For 14282/14282 co-relation queries the response was YES. [2023-09-01 14:59:48,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1327 events. 679/1327 cut-off events. For 14282/14282 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7894 event pairs, 120 based on Foata normal form. 28/1354 useless extension candidates. Maximal degree in co-relation 8784. Up to 629 conditions per place. [2023-09-01 14:59:48,476 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 214 selfloop transitions, 109 changer transitions 1/324 dead transitions. [2023-09-01 14:59:48,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 5258 flow [2023-09-01 14:59:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:59:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:59:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2428 transitions. [2023-09-01 14:59:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41159518562468217 [2023-09-01 14:59:48,481 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2428 transitions. [2023-09-01 14:59:48,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2428 transitions. [2023-09-01 14:59:48,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2428 transitions. [2023-09-01 14:59:48,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.8235294117647) internal successors, (2428), 17 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:48,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:48,493 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:48,494 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 4366 flow. Second operand 17 states and 2428 transitions. [2023-09-01 14:59:48,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 5258 flow [2023-09-01 14:59:48,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 324 transitions, 5142 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-09-01 14:59:48,556 INFO L231 Difference]: Finished difference. Result has 177 places, 263 transitions, 4443 flow [2023-09-01 14:59:48,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4443, PETRI_PLACES=177, PETRI_TRANSITIONS=263} [2023-09-01 14:59:48,556 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-09-01 14:59:48,556 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 263 transitions, 4443 flow [2023-09-01 14:59:48,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:48,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:48,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:48,562 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 14:59:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:59:48,758 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:48,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636203, now seen corresponding path program 5 times [2023-09-01 14:59:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:48,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265140680] [2023-09-01 14:59:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:48,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265140680] [2023-09-01 14:59:48,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265140680] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:48,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75986514] [2023-09-01 14:59:48,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:59:48,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:48,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:48,901 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 14:59:48,928 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 14:59:49,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:59:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:49,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75986514] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:49,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:49,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 14:59:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285613291] [2023-09-01 14:59:49,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 14:59:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 14:59:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-09-01 14:59:49,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:49,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 263 transitions, 4443 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:49,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:49,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:49,789 INFO L130 PetriNetUnfolder]: 763/1475 cut-off events. [2023-09-01 14:59:49,790 INFO L131 PetriNetUnfolder]: For 15441/15441 co-relation queries the response was YES. [2023-09-01 14:59:49,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1475 events. 763/1475 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8873 event pairs, 102 based on Foata normal form. 12/1486 useless extension candidates. Maximal degree in co-relation 9914. Up to 714 conditions per place. [2023-09-01 14:59:49,806 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 189 selfloop transitions, 133 changer transitions 0/322 dead transitions. [2023-09-01 14:59:49,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 5667 flow [2023-09-01 14:59:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 14:59:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 14:59:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1566 transitions. [2023-09-01 14:59:49,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102698454283469 [2023-09-01 14:59:49,809 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1566 transitions. [2023-09-01 14:59:49,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1566 transitions. [2023-09-01 14:59:49,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:49,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1566 transitions. [2023-09-01 14:59:49,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.36363636363637) internal successors, (1566), 11 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,815 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,815 INFO L175 Difference]: Start difference. First operand has 177 places, 263 transitions, 4443 flow. Second operand 11 states and 1566 transitions. [2023-09-01 14:59:49,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 5667 flow [2023-09-01 14:59:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 322 transitions, 5553 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-09-01 14:59:49,919 INFO L231 Difference]: Finished difference. Result has 183 places, 284 transitions, 5098 flow [2023-09-01 14:59:49,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5098, PETRI_PLACES=183, PETRI_TRANSITIONS=284} [2023-09-01 14:59:49,920 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-09-01 14:59:49,920 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 284 transitions, 5098 flow [2023-09-01 14:59:49,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:49,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:49,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:49,929 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 14:59:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:59:50,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:50,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1697963331, now seen corresponding path program 6 times [2023-09-01 14:59:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146448347] [2023-09-01 14:59:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:50,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:50,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146448347] [2023-09-01 14:59:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146448347] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:50,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838342061] [2023-09-01 14:59:50,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:59:50,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:50,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:50,317 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 14:59:50,328 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 14:59:50,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:59:50,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838342061] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:50,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:50,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 14:59:50,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74100188] [2023-09-01 14:59:50,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:50,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 14:59:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 14:59:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:59:50,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:50,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 284 transitions, 5098 flow. Second operand has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:50,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:50,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:50,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:51,767 INFO L130 PetriNetUnfolder]: 1108/2170 cut-off events. [2023-09-01 14:59:51,767 INFO L131 PetriNetUnfolder]: For 28091/28091 co-relation queries the response was YES. [2023-09-01 14:59:51,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15541 conditions, 2170 events. 1108/2170 cut-off events. For 28091/28091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14201 event pairs, 45 based on Foata normal form. 16/2185 useless extension candidates. Maximal degree in co-relation 15275. Up to 545 conditions per place. [2023-09-01 14:59:51,792 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 248 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2023-09-01 14:59:51,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 493 transitions, 8920 flow [2023-09-01 14:59:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:59:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:59:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2726 transitions. [2023-09-01 14:59:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346883057788564 [2023-09-01 14:59:51,798 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2726 transitions. [2023-09-01 14:59:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2726 transitions. [2023-09-01 14:59:51,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:51,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2726 transitions. [2023-09-01 14:59:51,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.47368421052633) internal successors, (2726), 19 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,846 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:51,846 INFO L175 Difference]: Start difference. First operand has 183 places, 284 transitions, 5098 flow. Second operand 19 states and 2726 transitions. [2023-09-01 14:59:51,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 493 transitions, 8920 flow [2023-09-01 14:59:52,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 493 transitions, 8630 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-09-01 14:59:52,017 INFO L231 Difference]: Finished difference. Result has 206 places, 383 transitions, 7499 flow [2023-09-01 14:59:52,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7499, PETRI_PLACES=206, PETRI_TRANSITIONS=383} [2023-09-01 14:59:52,018 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-09-01 14:59:52,018 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 383 transitions, 7499 flow [2023-09-01 14:59:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:52,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:52,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:52,028 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 14:59:52,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:59:52,228 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:52,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 625542995, now seen corresponding path program 7 times [2023-09-01 14:59:52,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:52,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736914661] [2023-09-01 14:59:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736914661] [2023-09-01 14:59:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736914661] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489143278] [2023-09-01 14:59:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:59:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:52,441 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 14:59:52,464 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 14:59:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:52,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489143278] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:52,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:52,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 14:59:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113760013] [2023-09-01 14:59:52,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:52,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 14:59:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 14:59:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:59:52,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:52,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 383 transitions, 7499 flow. Second operand has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:52,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:52,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:52,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:53,891 INFO L130 PetriNetUnfolder]: 1126/2204 cut-off events. [2023-09-01 14:59:53,891 INFO L131 PetriNetUnfolder]: For 36261/36261 co-relation queries the response was YES. [2023-09-01 14:59:53,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2204 events. 1126/2204 cut-off events. For 36261/36261 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14381 event pairs, 55 based on Foata normal form. 12/2215 useless extension candidates. Maximal degree in co-relation 16860. Up to 597 conditions per place. [2023-09-01 14:59:53,914 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 225 selfloop transitions, 248 changer transitions 0/473 dead transitions. [2023-09-01 14:59:53,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9358 flow [2023-09-01 14:59:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:59:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:59:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2702 transitions. [2023-09-01 14:59:53,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409828606097376 [2023-09-01 14:59:53,918 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2702 transitions. [2023-09-01 14:59:53,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2702 transitions. [2023-09-01 14:59:53,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:53,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2702 transitions. [2023-09-01 14:59:53,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 142.21052631578948) internal successors, (2702), 19 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:53,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:53,927 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:53,927 INFO L175 Difference]: Start difference. First operand has 206 places, 383 transitions, 7499 flow. Second operand 19 states and 2702 transitions. [2023-09-01 14:59:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9358 flow [2023-09-01 14:59:54,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9004 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-09-01 14:59:54,165 INFO L231 Difference]: Finished difference. Result has 226 places, 392 transitions, 8009 flow [2023-09-01 14:59:54,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7103, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8009, PETRI_PLACES=226, PETRI_TRANSITIONS=392} [2023-09-01 14:59:54,165 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-09-01 14:59:54,166 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 392 transitions, 8009 flow [2023-09-01 14:59:54,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:54,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:54,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:54,171 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 14:59:54,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:54,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:54,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1892416347, now seen corresponding path program 8 times [2023-09-01 14:59:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:54,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50829592] [2023-09-01 14:59:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:54,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50829592] [2023-09-01 14:59:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50829592] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745473372] [2023-09-01 14:59:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:59:54,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:54,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:54,584 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 14:59:54,604 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 14:59:54,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:59:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:54,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745473372] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:55,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:55,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:59:55,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748889658] [2023-09-01 14:59:55,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:55,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:55,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:55,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 392 transitions, 8009 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:55,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:55,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:55,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:56,210 INFO L130 PetriNetUnfolder]: 1189/2331 cut-off events. [2023-09-01 14:59:56,210 INFO L131 PetriNetUnfolder]: For 42784/42784 co-relation queries the response was YES. [2023-09-01 14:59:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18687 conditions, 2331 events. 1189/2331 cut-off events. For 42784/42784 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15406 event pairs, 216 based on Foata normal form. 24/2354 useless extension candidates. Maximal degree in co-relation 18376. Up to 1366 conditions per place. [2023-09-01 14:59:56,234 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 296 selfloop transitions, 186 changer transitions 2/484 dead transitions. [2023-09-01 14:59:56,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 10028 flow [2023-09-01 14:59:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:59:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:59:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2282 transitions. [2023-09-01 14:59:56,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102305475504325 [2023-09-01 14:59:56,240 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2282 transitions. [2023-09-01 14:59:56,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2282 transitions. [2023-09-01 14:59:56,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:56,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2282 transitions. [2023-09-01 14:59:56,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.625) internal successors, (2282), 16 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:56,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:56,247 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:56,247 INFO L175 Difference]: Start difference. First operand has 226 places, 392 transitions, 8009 flow. Second operand 16 states and 2282 transitions. [2023-09-01 14:59:56,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 10028 flow [2023-09-01 14:59:56,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9795 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-09-01 14:59:56,491 INFO L231 Difference]: Finished difference. Result has 238 places, 421 transitions, 9012 flow [2023-09-01 14:59:56,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9012, PETRI_PLACES=238, PETRI_TRANSITIONS=421} [2023-09-01 14:59:56,492 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-09-01 14:59:56,492 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 421 transitions, 9012 flow [2023-09-01 14:59:56,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:56,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:56,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:56,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:59:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-09-01 14:59:56,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:56,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 158319213, now seen corresponding path program 9 times [2023-09-01 14:59:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404328051] [2023-09-01 14:59:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:56,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:56,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404328051] [2023-09-01 14:59:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404328051] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575268224] [2023-09-01 14:59:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:59:56,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:56,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:56,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:59:56,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:59:56,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:59:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:57,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575268224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:57,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 14:59:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026127603] [2023-09-01 14:59:57,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:57,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:59:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:59:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:59:57,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:57,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 421 transitions, 9012 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:57,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:57,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:57,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:59:58,345 INFO L130 PetriNetUnfolder]: 1196/2314 cut-off events. [2023-09-01 14:59:58,345 INFO L131 PetriNetUnfolder]: For 46147/46147 co-relation queries the response was YES. [2023-09-01 14:59:58,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 2314 events. 1196/2314 cut-off events. For 46147/46147 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15011 event pairs, 216 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 19267. Up to 1376 conditions per place. [2023-09-01 14:59:58,367 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 291 selfloop transitions, 185 changer transitions 2/478 dead transitions. [2023-09-01 14:59:58,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 478 transitions, 10462 flow [2023-09-01 14:59:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:59:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:59:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2000 transitions. [2023-09-01 14:59:58,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169205434335115 [2023-09-01 14:59:58,377 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2000 transitions. [2023-09-01 14:59:58,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2000 transitions. [2023-09-01 14:59:58,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:59:58,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2000 transitions. [2023-09-01 14:59:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.85714285714286) internal successors, (2000), 14 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:58,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:58,387 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:58,388 INFO L175 Difference]: Start difference. First operand has 238 places, 421 transitions, 9012 flow. Second operand 14 states and 2000 transitions. [2023-09-01 14:59:58,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 478 transitions, 10462 flow [2023-09-01 14:59:58,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 478 transitions, 10314 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-09-01 14:59:58,625 INFO L231 Difference]: Finished difference. Result has 246 places, 427 transitions, 9432 flow [2023-09-01 14:59:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9432, PETRI_PLACES=246, PETRI_TRANSITIONS=427} [2023-09-01 14:59:58,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-09-01 14:59:58,626 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 427 transitions, 9432 flow [2023-09-01 14:59:58,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:59:58,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:59:58,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 14:59:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:58,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:59:58,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:59:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -789546511, now seen corresponding path program 10 times [2023-09-01 14:59:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:59:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336085478] [2023-09-01 14:59:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:59:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:59:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:59:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:58,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:59:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336085478] [2023-09-01 14:59:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336085478] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:59:58,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685788709] [2023-09-01 14:59:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:59:58,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:59:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:59:58,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:59:59,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:59:59,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:59:59,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:59:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:59:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:59:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:59,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:59:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:59:59,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685788709] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:59:59,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:59:59,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-09-01 14:59:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268161150] [2023-09-01 14:59:59,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:59:59,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 14:59:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:59:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 14:59:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 14:59:59,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 14:59:59,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 427 transitions, 9432 flow. Second operand has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:59:59,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:59:59,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 14:59:59,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:00,935 INFO L130 PetriNetUnfolder]: 1350/2640 cut-off events. [2023-09-01 15:00:00,935 INFO L131 PetriNetUnfolder]: For 54961/54961 co-relation queries the response was YES. [2023-09-01 15:00:00,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2640 events. 1350/2640 cut-off events. For 54961/54961 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17644 event pairs, 35 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 22569. Up to 647 conditions per place. [2023-09-01 15:00:00,957 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 309 selfloop transitions, 253 changer transitions 0/562 dead transitions. [2023-09-01 15:00:00,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 562 transitions, 12551 flow [2023-09-01 15:00:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 15:00:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 15:00:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2577 transitions. [2023-09-01 15:00:00,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125840537944284 [2023-09-01 15:00:00,962 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2577 transitions. [2023-09-01 15:00:00,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2577 transitions. [2023-09-01 15:00:00,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:00,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2577 transitions. [2023-09-01 15:00:00,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.16666666666666) internal successors, (2577), 18 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:00,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:00,971 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:00,971 INFO L175 Difference]: Start difference. First operand has 246 places, 427 transitions, 9432 flow. Second operand 18 states and 2577 transitions. [2023-09-01 15:00:00,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 562 transitions, 12551 flow [2023-09-01 15:00:01,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 562 transitions, 12203 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-09-01 15:00:01,230 INFO L231 Difference]: Finished difference. Result has 253 places, 444 transitions, 10131 flow [2023-09-01 15:00:01,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10131, PETRI_PLACES=253, PETRI_TRANSITIONS=444} [2023-09-01 15:00:01,231 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-09-01 15:00:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 444 transitions, 10131 flow [2023-09-01 15:00:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:01,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:01,432 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:01,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:01,432 INFO L85 PathProgramCache]: Analyzing trace with hash -212875034, now seen corresponding path program 1 times [2023-09-01 15:00:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154507234] [2023-09-01 15:00:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:01,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154507234] [2023-09-01 15:00:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154507234] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:01,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446373892] [2023-09-01 15:00:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:01,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:01,538 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:01,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 15:00:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 15:00:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:01,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:00:01,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:01,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:01,985 INFO L321 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2023-09-01 15:00:01,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 151 [2023-09-01 15:00:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:02,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:02,322 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* 4 .cse0) c_~f~0.offset))) (<= c_~size~0 .cse0))))) is different from false [2023-09-01 15:00:02,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:02,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-09-01 15:00:02,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:02,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 254 [2023-09-01 15:00:02,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:02,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 194 [2023-09-01 15:00:02,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:02,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-09-01 15:00:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446373892] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:03,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:03,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-09-01 15:00:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782173709] [2023-09-01 15:00:03,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:00:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:00:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-09-01 15:00:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-09-01 15:00:03,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 444 transitions, 10131 flow. Second operand has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:03,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:03,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-09-01 15:00:03,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:04,748 INFO L130 PetriNetUnfolder]: 1673/3401 cut-off events. [2023-09-01 15:00:04,748 INFO L131 PetriNetUnfolder]: For 83073/83073 co-relation queries the response was YES. [2023-09-01 15:00:04,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28798 conditions, 3401 events. 1673/3401 cut-off events. For 83073/83073 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24940 event pairs, 172 based on Foata normal form. 148/3548 useless extension candidates. Maximal degree in co-relation 28642. Up to 1386 conditions per place. [2023-09-01 15:00:04,776 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 395 selfloop transitions, 133 changer transitions 161/689 dead transitions. [2023-09-01 15:00:04,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 15671 flow [2023-09-01 15:00:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:00:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:00:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1836 transitions. [2023-09-01 15:00:04,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23004636010524998 [2023-09-01 15:00:04,781 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1836 transitions. [2023-09-01 15:00:04,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1836 transitions. [2023-09-01 15:00:04,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:04,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1836 transitions. [2023-09-01 15:00:04,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.82608695652173) internal successors, (1836), 23 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:04,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:04,789 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:04,790 INFO L175 Difference]: Start difference. First operand has 253 places, 444 transitions, 10131 flow. Second operand 23 states and 1836 transitions. [2023-09-01 15:00:04,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 15671 flow [2023-09-01 15:00:05,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 14983 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-09-01 15:00:05,137 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 9940 flow [2023-09-01 15:00:05,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9940, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2023-09-01 15:00:05,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-09-01 15:00:05,138 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 9940 flow [2023-09-01 15:00:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:05,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:05,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:05,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:05,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 15:00:05,339 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:05,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1127277119, now seen corresponding path program 6 times [2023-09-01 15:00:05,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:05,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60130036] [2023-09-01 15:00:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:05,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:05,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60130036] [2023-09-01 15:00:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60130036] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680300555] [2023-09-01 15:00:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:00:05,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:05,440 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:05,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 15:00:05,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:00:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 15:00:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:05,735 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:00:05,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:05,737 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 17 treesize of output 10 [2023-09-01 15:00:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:05,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:05,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:05,981 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 128 [2023-09-01 15:00:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680300555] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:06,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:06,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-09-01 15:00:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056777206] [2023-09-01 15:00:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 15:00:06,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 15:00:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-09-01 15:00:08,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:00:09,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 347 [2023-09-01 15:00:09,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 9940 flow. Second operand has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:09,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:09,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 347 [2023-09-01 15:00:09,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:10,785 INFO L130 PetriNetUnfolder]: 1622/3315 cut-off events. [2023-09-01 15:00:10,785 INFO L131 PetriNetUnfolder]: For 73385/73385 co-relation queries the response was YES. [2023-09-01 15:00:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 3315 events. 1622/3315 cut-off events. For 73385/73385 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24234 event pairs, 87 based on Foata normal form. 53/3367 useless extension candidates. Maximal degree in co-relation 28683. Up to 1119 conditions per place. [2023-09-01 15:00:10,811 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 393 selfloop transitions, 107 changer transitions 166/666 dead transitions. [2023-09-01 15:00:10,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 666 transitions, 15425 flow [2023-09-01 15:00:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 15:00:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 15:00:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3360 transitions. [2023-09-01 15:00:10,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345821325648415 [2023-09-01 15:00:10,817 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3360 transitions. [2023-09-01 15:00:10,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3360 transitions. [2023-09-01 15:00:10,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:10,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3360 transitions. [2023-09-01 15:00:10,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 120.0) internal successors, (3360), 28 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:10,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:10,828 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:10,828 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 9940 flow. Second operand 28 states and 3360 transitions. [2023-09-01 15:00:10,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 666 transitions, 15425 flow [2023-09-01 15:00:11,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 666 transitions, 15053 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-09-01 15:00:11,228 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 8984 flow [2023-09-01 15:00:11,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8984, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2023-09-01 15:00:11,229 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-09-01 15:00:11,229 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 8984 flow [2023-09-01 15:00:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:11,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:11,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:11,430 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:11,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash 289751092, now seen corresponding path program 11 times [2023-09-01 15:00:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:11,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044040042] [2023-09-01 15:00:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044040042] [2023-09-01 15:00:11,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044040042] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768125363] [2023-09-01 15:00:11,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:00:11,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:11,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:11,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 15:00:11,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:00:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 15:00:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:11,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768125363] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:12,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 15:00:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336368636] [2023-09-01 15:00:12,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 15:00:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 15:00:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-09-01 15:00:12,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:00:12,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 8984 flow. Second operand has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:12,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:12,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:00:12,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:13,518 INFO L130 PetriNetUnfolder]: 1235/2475 cut-off events. [2023-09-01 15:00:13,518 INFO L131 PetriNetUnfolder]: For 53898/53898 co-relation queries the response was YES. [2023-09-01 15:00:13,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 2475 events. 1235/2475 cut-off events. For 53898/53898 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16526 event pairs, 183 based on Foata normal form. 16/2490 useless extension candidates. Maximal degree in co-relation 21220. Up to 927 conditions per place. [2023-09-01 15:00:13,543 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 267 selfloop transitions, 195 changer transitions 1/463 dead transitions. [2023-09-01 15:00:13,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 463 transitions, 10351 flow [2023-09-01 15:00:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 15:00:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 15:00:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2549 transitions. [2023-09-01 15:00:13,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40810118475824525 [2023-09-01 15:00:13,546 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2549 transitions. [2023-09-01 15:00:13,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2549 transitions. [2023-09-01 15:00:13,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:13,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2549 transitions. [2023-09-01 15:00:13,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 141.61111111111111) internal successors, (2549), 18 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:13,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:13,551 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:13,552 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 8984 flow. Second operand 18 states and 2549 transitions. [2023-09-01 15:00:13,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 463 transitions, 10351 flow [2023-09-01 15:00:13,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 463 transitions, 9611 flow, removed 125 selfloop flow, removed 23 redundant places. [2023-09-01 15:00:13,792 INFO L231 Difference]: Finished difference. Result has 265 places, 405 transitions, 8805 flow [2023-09-01 15:00:13,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8805, PETRI_PLACES=265, PETRI_TRANSITIONS=405} [2023-09-01 15:00:13,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-09-01 15:00:13,792 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 405 transitions, 8805 flow [2023-09-01 15:00:13,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:13,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:13,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:13,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:13,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:13,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1623000778, now seen corresponding path program 2 times [2023-09-01 15:00:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:13,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644666838] [2023-09-01 15:00:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:14,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644666838] [2023-09-01 15:00:14,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644666838] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:14,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058264998] [2023-09-01 15:00:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:00:14,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:14,869 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:14,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 15:00:14,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:00:14,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:14,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 15:00:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:15,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 15:00:15,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:15,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:00:15,536 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-09-01 15:00:15,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2023-09-01 15:00:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:15,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:16,502 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (~x2~0 Int) (v_ArrVal_729 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_729) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (= (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* .cse0 4)))) (< .cse0 0))))) is different from false [2023-09-01 15:00:16,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:16,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-09-01 15:00:16,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-09-01 15:00:16,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:16,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2023-09-01 15:00:16,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:16,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 113 [2023-09-01 15:00:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:17,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058264998] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:17,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:17,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 15:00:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611743566] [2023-09-01 15:00:17,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:17,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:00:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:17,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:00:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=835, Unknown=2, NotChecked=60, Total=1056 [2023-09-01 15:00:17,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-09-01 15:00:17,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 405 transitions, 8805 flow. Second operand has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:17,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:17,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-09-01 15:00:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:22,925 INFO L130 PetriNetUnfolder]: 1541/3100 cut-off events. [2023-09-01 15:00:22,926 INFO L131 PetriNetUnfolder]: For 57246/57246 co-relation queries the response was YES. [2023-09-01 15:00:22,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3100 events. 1541/3100 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21833 event pairs, 129 based on Foata normal form. 39/3138 useless extension candidates. Maximal degree in co-relation 24967. Up to 1819 conditions per place. [2023-09-01 15:00:22,948 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 430 selfloop transitions, 101 changer transitions 111/642 dead transitions. [2023-09-01 15:00:22,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 642 transitions, 13257 flow [2023-09-01 15:00:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:00:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:00:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2525 transitions. [2023-09-01 15:00:22,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2273955331412104 [2023-09-01 15:00:22,951 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2525 transitions. [2023-09-01 15:00:22,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2525 transitions. [2023-09-01 15:00:22,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:22,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2525 transitions. [2023-09-01 15:00:22,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.90625) internal successors, (2525), 32 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:22,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:22,962 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:22,962 INFO L175 Difference]: Start difference. First operand has 265 places, 405 transitions, 8805 flow. Second operand 32 states and 2525 transitions. [2023-09-01 15:00:22,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 642 transitions, 13257 flow [2023-09-01 15:00:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 642 transitions, 12846 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-09-01 15:00:23,223 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 9681 flow [2023-09-01 15:00:23,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9681, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2023-09-01 15:00:23,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-09-01 15:00:23,224 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 9681 flow [2023-09-01 15:00:23,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:23,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:23,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:23,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:23,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:23,425 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:23,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1456848755, now seen corresponding path program 7 times [2023-09-01 15:00:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874238345] [2023-09-01 15:00:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:23,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:23,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874238345] [2023-09-01 15:00:23,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874238345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:23,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778351742] [2023-09-01 15:00:23,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:00:23,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:23,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:23,689 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:23,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 15:00:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 15:00:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:24,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:00:24,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:24,061 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 17 treesize of output 10 [2023-09-01 15:00:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:24,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:24,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:24,282 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 71 treesize of output 56 [2023-09-01 15:00:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778351742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:24,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-09-01 15:00:24,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724357804] [2023-09-01 15:00:24,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 15:00:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 15:00:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-09-01 15:00:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 347 [2023-09-01 15:00:25,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 9681 flow. Second operand has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:25,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:25,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 347 [2023-09-01 15:00:25,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:28,158 INFO L130 PetriNetUnfolder]: 1470/2904 cut-off events. [2023-09-01 15:00:28,158 INFO L131 PetriNetUnfolder]: For 59240/59240 co-relation queries the response was YES. [2023-09-01 15:00:28,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24732 conditions, 2904 events. 1470/2904 cut-off events. For 59240/59240 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19671 event pairs, 138 based on Foata normal form. 19/2922 useless extension candidates. Maximal degree in co-relation 24555. Up to 2072 conditions per place. [2023-09-01 15:00:28,186 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 407 selfloop transitions, 112 changer transitions 71/590 dead transitions. [2023-09-01 15:00:28,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 590 transitions, 12513 flow [2023-09-01 15:00:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:00:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:00:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3889 transitions. [2023-09-01 15:00:28,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502341498559078 [2023-09-01 15:00:28,190 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3889 transitions. [2023-09-01 15:00:28,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3889 transitions. [2023-09-01 15:00:28,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:28,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3889 transitions. [2023-09-01 15:00:28,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 121.53125) internal successors, (3889), 32 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:28,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:28,203 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:28,203 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 9681 flow. Second operand 32 states and 3889 transitions. [2023-09-01 15:00:28,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 590 transitions, 12513 flow [2023-09-01 15:00:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 590 transitions, 12163 flow, removed 155 selfloop flow, removed 16 redundant places. [2023-09-01 15:00:28,480 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 9876 flow [2023-09-01 15:00:28,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9876, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2023-09-01 15:00:28,481 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2023-09-01 15:00:28,481 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 9876 flow [2023-09-01 15:00:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:28,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:28,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:28,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:28,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 15:00:28,682 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:28,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1057721665, now seen corresponding path program 3 times [2023-09-01 15:00:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:28,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216580253] [2023-09-01 15:00:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:28,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:29,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216580253] [2023-09-01 15:00:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216580253] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:29,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115841173] [2023-09-01 15:00:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:00:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:29,928 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:29,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 15:00:30,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:00:30,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:00:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:32,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:32,369 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:00:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:32,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:32,832 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:00:32,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:00:32,892 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:00:32,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:00:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:32,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115841173] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:32,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:32,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:00:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726283142] [2023-09-01 15:00:32,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:00:32,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:00:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=711, Unknown=1, NotChecked=0, Total=812 [2023-09-01 15:00:35,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:00:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:00:38,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 9876 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:38,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:38,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:00:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:41,582 INFO L130 PetriNetUnfolder]: 1576/3098 cut-off events. [2023-09-01 15:00:41,582 INFO L131 PetriNetUnfolder]: For 64706/64706 co-relation queries the response was YES. [2023-09-01 15:00:41,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26742 conditions, 3098 events. 1576/3098 cut-off events. For 64706/64706 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21166 event pairs, 157 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 26566. Up to 2427 conditions per place. [2023-09-01 15:00:41,614 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 429 selfloop transitions, 185 changer transitions 23/637 dead transitions. [2023-09-01 15:00:41,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 637 transitions, 13657 flow [2023-09-01 15:00:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 15:00:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 15:00:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4153 transitions. [2023-09-01 15:00:41,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34195142033758746 [2023-09-01 15:00:41,674 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4153 transitions. [2023-09-01 15:00:41,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4153 transitions. [2023-09-01 15:00:41,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:41,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4153 transitions. [2023-09-01 15:00:41,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.65714285714286) internal successors, (4153), 35 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:41,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:41,686 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:41,686 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 9876 flow. Second operand 35 states and 4153 transitions. [2023-09-01 15:00:41,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 637 transitions, 13657 flow [2023-09-01 15:00:41,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 637 transitions, 13228 flow, removed 63 selfloop flow, removed 18 redundant places. [2023-09-01 15:00:41,990 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 11946 flow [2023-09-01 15:00:41,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11946, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2023-09-01 15:00:41,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-09-01 15:00:41,991 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 11946 flow [2023-09-01 15:00:41,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:41,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:41,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:41,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 15:00:42,193 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:42,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 457305767, now seen corresponding path program 4 times [2023-09-01 15:00:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699986050] [2023-09-01 15:00:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:43,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699986050] [2023-09-01 15:00:43,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699986050] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:43,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807850562] [2023-09-01 15:00:43,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:00:43,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:43,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:43,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 15:00:43,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:00:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:00:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:43,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:00:43,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:00:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:43,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:44,346 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:00:44,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:00:44,410 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:00:44,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:00:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807850562] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:44,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:44,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:00:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693791143] [2023-09-01 15:00:44,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:00:44,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:00:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:00:47,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:00:47,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 11946 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:47,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:47,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:00:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:00:49,467 INFO L130 PetriNetUnfolder]: 1596/3144 cut-off events. [2023-09-01 15:00:49,467 INFO L131 PetriNetUnfolder]: For 66974/66974 co-relation queries the response was YES. [2023-09-01 15:00:49,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3144 events. 1596/3144 cut-off events. For 66974/66974 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21667 event pairs, 181 based on Foata normal form. 6/3148 useless extension candidates. Maximal degree in co-relation 27763. Up to 2479 conditions per place. [2023-09-01 15:00:49,503 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 446 selfloop transitions, 170 changer transitions 15/631 dead transitions. [2023-09-01 15:00:49,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 631 transitions, 14015 flow [2023-09-01 15:00:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 15:00:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 15:00:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3338 transitions. [2023-09-01 15:00:49,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355701934952654 [2023-09-01 15:00:49,506 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3338 transitions. [2023-09-01 15:00:49,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3338 transitions. [2023-09-01 15:00:49,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:00:49,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3338 transitions. [2023-09-01 15:00:49,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 119.21428571428571) internal successors, (3338), 28 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:49,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:49,515 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:49,515 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 11946 flow. Second operand 28 states and 3338 transitions. [2023-09-01 15:00:49,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 631 transitions, 14015 flow [2023-09-01 15:00:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 631 transitions, 13624 flow, removed 155 selfloop flow, removed 11 redundant places. [2023-09-01 15:00:49,881 INFO L231 Difference]: Finished difference. Result has 358 places, 545 transitions, 12428 flow [2023-09-01 15:00:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12428, PETRI_PLACES=358, PETRI_TRANSITIONS=545} [2023-09-01 15:00:49,882 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-09-01 15:00:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 545 transitions, 12428 flow [2023-09-01 15:00:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:49,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:00:49,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:00:49,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 15:00:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 15:00:50,085 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:00:50,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:00:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1593429793, now seen corresponding path program 5 times [2023-09-01 15:00:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:00:50,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536223440] [2023-09-01 15:00:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:00:50,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:00:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:00:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:51,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:00:51,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536223440] [2023-09-01 15:00:51,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536223440] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:00:51,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404704502] [2023-09-01 15:00:51,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:00:51,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:00:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:00:51,074 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:00:51,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 15:00:51,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:00:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:00:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:00:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:00:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:00:51,530 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-09-01 15:00:51,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2023-09-01 15:00:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:00:51,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:00:52,244 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:00:52,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:00:52,310 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:00:52,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:00:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:00:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404704502] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:52,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:52,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-09-01 15:00:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714671459] [2023-09-01 15:00:52,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:52,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 15:00:52,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 15:00:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-09-01 15:00:56,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-09-01 15:00:56,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 545 transitions, 12428 flow. Second operand has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:00:56,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:00:56,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-09-01 15:00:56,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:00,138 INFO L130 PetriNetUnfolder]: 1625/3195 cut-off events. [2023-09-01 15:01:00,138 INFO L131 PetriNetUnfolder]: For 70156/70156 co-relation queries the response was YES. [2023-09-01 15:01:00,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28688 conditions, 3195 events. 1625/3195 cut-off events. For 70156/70156 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22036 event pairs, 189 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 28489. Up to 2545 conditions per place. [2023-09-01 15:01:00,175 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 455 selfloop transitions, 178 changer transitions 21/654 dead transitions. [2023-09-01 15:01:00,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 654 transitions, 14454 flow [2023-09-01 15:01:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:01:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:01:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3780 transitions. [2023-09-01 15:01:00,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404178674351585 [2023-09-01 15:01:00,185 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3780 transitions. [2023-09-01 15:01:00,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3780 transitions. [2023-09-01 15:01:00,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:00,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3780 transitions. [2023-09-01 15:01:00,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 118.125) internal successors, (3780), 32 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:00,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:00,197 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:00,197 INFO L175 Difference]: Start difference. First operand has 358 places, 545 transitions, 12428 flow. Second operand 32 states and 3780 transitions. [2023-09-01 15:01:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 654 transitions, 14454 flow [2023-09-01 15:01:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 654 transitions, 14286 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-09-01 15:01:00,744 INFO L231 Difference]: Finished difference. Result has 382 places, 554 transitions, 12870 flow [2023-09-01 15:01:00,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12870, PETRI_PLACES=382, PETRI_TRANSITIONS=554} [2023-09-01 15:01:00,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-09-01 15:01:00,745 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 554 transitions, 12870 flow [2023-09-01 15:01:00,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:00,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:00,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:00,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:00,952 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:00,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash -571252333, now seen corresponding path program 6 times [2023-09-01 15:01:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:00,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262227953] [2023-09-01 15:01:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:00,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:01,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:01,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262227953] [2023-09-01 15:01:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262227953] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:01,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413181050] [2023-09-01 15:01:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:01:01,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:01,970 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:01,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 15:01:02,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:01:02,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:01:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:02,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:02,333 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:01:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:02,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:02,973 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:01:02,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:01:03,040 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:01:03,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:01:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413181050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:03,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:03,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:01:03,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816465091] [2023-09-01 15:01:03,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:01:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:01:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:01:06,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:01:06,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 554 transitions, 12870 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:06,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:06,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:01:06,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:09,930 INFO L130 PetriNetUnfolder]: 1722/3362 cut-off events. [2023-09-01 15:01:09,930 INFO L131 PetriNetUnfolder]: For 77736/77736 co-relation queries the response was YES. [2023-09-01 15:01:09,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 3362 events. 1722/3362 cut-off events. For 77736/77736 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23201 event pairs, 215 based on Foata normal form. 5/3366 useless extension candidates. Maximal degree in co-relation 30673. Up to 2866 conditions per place. [2023-09-01 15:01:09,971 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 517 selfloop transitions, 145 changer transitions 21/683 dead transitions. [2023-09-01 15:01:09,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 683 transitions, 15750 flow [2023-09-01 15:01:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 15:01:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 15:01:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4144 transitions. [2023-09-01 15:01:09,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34121037463976944 [2023-09-01 15:01:09,975 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4144 transitions. [2023-09-01 15:01:09,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4144 transitions. [2023-09-01 15:01:09,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:09,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4144 transitions. [2023-09-01 15:01:09,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.4) internal successors, (4144), 35 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,997 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:09,997 INFO L175 Difference]: Start difference. First operand has 382 places, 554 transitions, 12870 flow. Second operand 35 states and 4144 transitions. [2023-09-01 15:01:09,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 683 transitions, 15750 flow [2023-09-01 15:01:10,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 683 transitions, 15399 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-09-01 15:01:10,583 INFO L231 Difference]: Finished difference. Result has 397 places, 594 transitions, 13946 flow [2023-09-01 15:01:10,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12541, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13946, PETRI_PLACES=397, PETRI_TRANSITIONS=594} [2023-09-01 15:01:10,583 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 376 predicate places. [2023-09-01 15:01:10,583 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 594 transitions, 13946 flow [2023-09-01 15:01:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:10,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:10,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:10,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:10,785 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:10,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1478888581, now seen corresponding path program 7 times [2023-09-01 15:01:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:10,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600820760] [2023-09-01 15:01:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600820760] [2023-09-01 15:01:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600820760] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:11,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195664351] [2023-09-01 15:01:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:01:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:11,977 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:11,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 15:01:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 15:01:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:12,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:12,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-09-01 15:01:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:12,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:12,989 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:01:12,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:01:13,054 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:01:13,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:01:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195664351] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:13,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-09-01 15:01:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303218615] [2023-09-01 15:01:13,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:01:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:01:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:01:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-09-01 15:01:16,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 594 transitions, 13946 flow. Second operand has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:16,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:16,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-09-01 15:01:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:19,862 INFO L130 PetriNetUnfolder]: 1781/3477 cut-off events. [2023-09-01 15:01:19,862 INFO L131 PetriNetUnfolder]: For 82653/82653 co-relation queries the response was YES. [2023-09-01 15:01:19,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32398 conditions, 3477 events. 1781/3477 cut-off events. For 82653/82653 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24306 event pairs, 198 based on Foata normal form. 3/3479 useless extension candidates. Maximal degree in co-relation 32186. Up to 3047 conditions per place. [2023-09-01 15:01:19,900 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 548 selfloop transitions, 138 changer transitions 15/701 dead transitions. [2023-09-01 15:01:19,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 701 transitions, 16517 flow [2023-09-01 15:01:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:01:19,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:01:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3709 transitions. [2023-09-01 15:01:19,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33402377521613835 [2023-09-01 15:01:19,905 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3709 transitions. [2023-09-01 15:01:19,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3709 transitions. [2023-09-01 15:01:19,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:19,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3709 transitions. [2023-09-01 15:01:19,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 115.90625) internal successors, (3709), 32 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:19,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:19,916 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:19,916 INFO L175 Difference]: Start difference. First operand has 397 places, 594 transitions, 13946 flow. Second operand 32 states and 3709 transitions. [2023-09-01 15:01:19,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 701 transitions, 16517 flow [2023-09-01 15:01:20,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 701 transitions, 15705 flow, removed 83 selfloop flow, removed 22 redundant places. [2023-09-01 15:01:20,367 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 14369 flow [2023-09-01 15:01:20,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13178, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14369, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-09-01 15:01:20,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-09-01 15:01:20,369 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 14369 flow [2023-09-01 15:01:20,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:20,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:20,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:20,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 15:01:20,573 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:20,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2091258710, now seen corresponding path program 8 times [2023-09-01 15:01:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:20,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469425787] [2023-09-01 15:01:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469425787] [2023-09-01 15:01:20,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469425787] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:20,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248257192] [2023-09-01 15:01:20,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:01:20,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:20,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:20,733 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:20,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 15:01:20,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:01:20,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 15:01:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:21,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:21,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248257192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:21,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 15:01:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687764341] [2023-09-01 15:01:21,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 15:01:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 15:01:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-09-01 15:01:21,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:01:21,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 14369 flow. Second operand has 14 states, 14 states have (on average 137.92857142857142) internal successors, (1931), 14 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:21,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:21,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:01:21,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:23,779 INFO L130 PetriNetUnfolder]: 2635/5195 cut-off events. [2023-09-01 15:01:23,780 INFO L131 PetriNetUnfolder]: For 140402/140402 co-relation queries the response was YES. [2023-09-01 15:01:23,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 5195 events. 2635/5195 cut-off events. For 140402/140402 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39183 event pairs, 297 based on Foata normal form. 70/5264 useless extension candidates. Maximal degree in co-relation 47262. Up to 1289 conditions per place. [2023-09-01 15:01:23,939 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 424 selfloop transitions, 485 changer transitions 4/913 dead transitions. [2023-09-01 15:01:23,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 913 transitions, 21309 flow [2023-09-01 15:01:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 15:01:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 15:01:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3015 transitions. [2023-09-01 15:01:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41375051461506795 [2023-09-01 15:01:23,941 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3015 transitions. [2023-09-01 15:01:23,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3015 transitions. [2023-09-01 15:01:23,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:23,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3015 transitions. [2023-09-01 15:01:23,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.57142857142858) internal successors, (3015), 21 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:23,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:23,947 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:23,947 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 14369 flow. Second operand 21 states and 3015 transitions. [2023-09-01 15:01:23,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 913 transitions, 21309 flow [2023-09-01 15:01:24,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 913 transitions, 20964 flow, removed 108 selfloop flow, removed 20 redundant places. [2023-09-01 15:01:24,735 INFO L231 Difference]: Finished difference. Result has 416 places, 798 transitions, 19659 flow [2023-09-01 15:01:24,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13777, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19659, PETRI_PLACES=416, PETRI_TRANSITIONS=798} [2023-09-01 15:01:24,736 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-09-01 15:01:24,736 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 798 transitions, 19659 flow [2023-09-01 15:01:24,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 137.92857142857142) internal successors, (1931), 14 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:24,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:24,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:24,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:24,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 15:01:24,937 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:24,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1479483227, now seen corresponding path program 9 times [2023-09-01 15:01:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719398859] [2023-09-01 15:01:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719398859] [2023-09-01 15:01:25,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719398859] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216105838] [2023-09-01 15:01:25,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:01:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:25,646 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 15:01:25,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:01:25,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:25,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 15:01:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:25,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:25,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:01:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:26,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:26,647 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:01:26,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:01:26,700 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:01:26,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:01:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:26,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216105838] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:26,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:26,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-09-01 15:01:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595702746] [2023-09-01 15:01:26,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:26,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 15:01:26,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 15:01:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-09-01 15:01:29,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 347 [2023-09-01 15:01:29,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 798 transitions, 19659 flow. Second operand has 28 states, 28 states have (on average 121.67857142857143) internal successors, (3407), 28 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:29,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:29,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 347 [2023-09-01 15:01:29,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:33,497 INFO L130 PetriNetUnfolder]: 2663/5250 cut-off events. [2023-09-01 15:01:33,498 INFO L131 PetriNetUnfolder]: For 157229/157229 co-relation queries the response was YES. [2023-09-01 15:01:33,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 5250 events. 2663/5250 cut-off events. For 157229/157229 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39639 event pairs, 370 based on Foata normal form. 7/5256 useless extension candidates. Maximal degree in co-relation 51549. Up to 4759 conditions per place. [2023-09-01 15:01:33,570 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 729 selfloop transitions, 141 changer transitions 25/895 dead transitions. [2023-09-01 15:01:33,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 895 transitions, 22456 flow [2023-09-01 15:01:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 15:01:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 15:01:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4253 transitions. [2023-09-01 15:01:33,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604848279369385 [2023-09-01 15:01:33,574 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4253 transitions. [2023-09-01 15:01:33,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4253 transitions. [2023-09-01 15:01:33,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:33,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4253 transitions. [2023-09-01 15:01:33,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 125.08823529411765) internal successors, (4253), 34 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:33,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:33,583 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:33,583 INFO L175 Difference]: Start difference. First operand has 416 places, 798 transitions, 19659 flow. Second operand 34 states and 4253 transitions. [2023-09-01 15:01:33,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 895 transitions, 22456 flow [2023-09-01 15:01:34,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 895 transitions, 21514 flow, removed 173 selfloop flow, removed 10 redundant places. [2023-09-01 15:01:34,588 INFO L231 Difference]: Finished difference. Result has 446 places, 816 transitions, 19682 flow [2023-09-01 15:01:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=18721, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19682, PETRI_PLACES=446, PETRI_TRANSITIONS=816} [2023-09-01 15:01:34,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-09-01 15:01:34,589 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 816 transitions, 19682 flow [2023-09-01 15:01:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 121.67857142857143) internal successors, (3407), 28 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:34,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:34,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:34,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:34,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:34,791 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:34,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1984941564, now seen corresponding path program 10 times [2023-09-01 15:01:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895755100] [2023-09-01 15:01:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:34,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895755100] [2023-09-01 15:01:34,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895755100] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491103404] [2023-09-01 15:01:34,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:01:34,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:34,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:34,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 15:01:35,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:01:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:01:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:35,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491103404] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:35,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-09-01 15:01:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125429815] [2023-09-01 15:01:35,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:35,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:01:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:01:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-09-01 15:01:35,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:01:35,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 816 transitions, 19682 flow. Second operand has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:35,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:35,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:01:35,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:40,010 INFO L130 PetriNetUnfolder]: 2927/5835 cut-off events. [2023-09-01 15:01:40,010 INFO L131 PetriNetUnfolder]: For 171867/171867 co-relation queries the response was YES. [2023-09-01 15:01:40,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55933 conditions, 5835 events. 2927/5835 cut-off events. For 171867/171867 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45752 event pairs, 758 based on Foata normal form. 62/5896 useless extension candidates. Maximal degree in co-relation 55707. Up to 4027 conditions per place. [2023-09-01 15:01:40,082 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 712 selfloop transitions, 315 changer transitions 1/1028 dead transitions. [2023-09-01 15:01:40,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1028 transitions, 24851 flow [2023-09-01 15:01:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 15:01:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 15:01:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5246 transitions. [2023-09-01 15:01:40,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859880052963626 [2023-09-01 15:01:40,086 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5246 transitions. [2023-09-01 15:01:40,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5246 transitions. [2023-09-01 15:01:40,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:40,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5246 transitions. [2023-09-01 15:01:40,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.78378378378378) internal successors, (5246), 37 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:40,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:40,098 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:40,098 INFO L175 Difference]: Start difference. First operand has 446 places, 816 transitions, 19682 flow. Second operand 37 states and 5246 transitions. [2023-09-01 15:01:40,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1028 transitions, 24851 flow [2023-09-01 15:01:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1028 transitions, 24500 flow, removed 71 selfloop flow, removed 27 redundant places. [2023-09-01 15:01:41,244 INFO L231 Difference]: Finished difference. Result has 467 places, 910 transitions, 22655 flow [2023-09-01 15:01:41,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=19341, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22655, PETRI_PLACES=467, PETRI_TRANSITIONS=910} [2023-09-01 15:01:41,245 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2023-09-01 15:01:41,245 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 910 transitions, 22655 flow [2023-09-01 15:01:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:41,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:41,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:41,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:41,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:41,449 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:41,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:41,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2141675087, now seen corresponding path program 11 times [2023-09-01 15:01:41,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:41,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028208561] [2023-09-01 15:01:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:42,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:42,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028208561] [2023-09-01 15:01:42,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028208561] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:42,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451823605] [2023-09-01 15:01:42,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:01:42,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:42,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:42,569 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:42,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 15:01:42,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:01:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:42,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:01:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:43,373 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-09-01 15:01:43,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 188 [2023-09-01 15:01:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:45,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:46,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:46,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 195 [2023-09-01 15:01:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451823605] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:46,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 27 [2023-09-01 15:01:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252363437] [2023-09-01 15:01:46,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:01:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:01:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:01:49,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:01:49,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 910 transitions, 22655 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:49,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:49,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:01:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:53,290 INFO L130 PetriNetUnfolder]: 3012/5990 cut-off events. [2023-09-01 15:01:53,291 INFO L131 PetriNetUnfolder]: For 182321/182321 co-relation queries the response was YES. [2023-09-01 15:01:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59577 conditions, 5990 events. 3012/5990 cut-off events. For 182321/182321 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47072 event pairs, 423 based on Foata normal form. 2/5991 useless extension candidates. Maximal degree in co-relation 59253. Up to 5564 conditions per place. [2023-09-01 15:01:53,373 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 877 selfloop transitions, 114 changer transitions 11/1002 dead transitions. [2023-09-01 15:01:53,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1002 transitions, 25903 flow [2023-09-01 15:01:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 15:01:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 15:01:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3307 transitions. [2023-09-01 15:01:53,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403664059283656 [2023-09-01 15:01:53,377 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3307 transitions. [2023-09-01 15:01:53,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3307 transitions. [2023-09-01 15:01:53,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:53,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3307 transitions. [2023-09-01 15:01:53,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.10714285714286) internal successors, (3307), 28 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:53,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:53,384 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:53,384 INFO L175 Difference]: Start difference. First operand has 467 places, 910 transitions, 22655 flow. Second operand 28 states and 3307 transitions. [2023-09-01 15:01:53,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1002 transitions, 25903 flow [2023-09-01 15:01:54,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1002 transitions, 25065 flow, removed 306 selfloop flow, removed 12 redundant places. [2023-09-01 15:01:54,816 INFO L231 Difference]: Finished difference. Result has 487 places, 943 transitions, 23082 flow [2023-09-01 15:01:54,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21844, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23082, PETRI_PLACES=487, PETRI_TRANSITIONS=943} [2023-09-01 15:01:54,818 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-09-01 15:01:54,818 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 943 transitions, 23082 flow [2023-09-01 15:01:54,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:54,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:54,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:54,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:55,019 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:55,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1193348527, now seen corresponding path program 12 times [2023-09-01 15:01:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:55,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234651368] [2023-09-01 15:01:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234651368] [2023-09-01 15:01:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234651368] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965734124] [2023-09-01 15:01:55,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:01:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:55,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:55,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 15:01:55,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:01:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:01:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:56,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:56,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-09-01 15:01:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:56,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:56,792 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:01:56,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:01:56,926 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:01:56,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:01:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:57,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965734124] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:57,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:57,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2023-09-01 15:01:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557364268] [2023-09-01 15:01:57,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 15:01:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 15:01:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-09-01 15:02:00,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-09-01 15:02:00,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 943 transitions, 23082 flow. Second operand has 26 states, 26 states have (on average 115.73076923076923) internal successors, (3009), 26 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:00,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:00,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-09-01 15:02:00,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:02,820 INFO L130 PetriNetUnfolder]: 3067/6097 cut-off events. [2023-09-01 15:02:02,820 INFO L131 PetriNetUnfolder]: For 185882/185882 co-relation queries the response was YES. [2023-09-01 15:02:02,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60012 conditions, 6097 events. 3067/6097 cut-off events. For 185882/185882 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47913 event pairs, 399 based on Foata normal form. 3/6099 useless extension candidates. Maximal degree in co-relation 59675. Up to 5633 conditions per place. [2023-09-01 15:02:02,906 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 884 selfloop transitions, 125 changer transitions 14/1023 dead transitions. [2023-09-01 15:02:02,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1023 transitions, 26155 flow [2023-09-01 15:02:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 15:02:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 15:02:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2864 transitions. [2023-09-01 15:02:02,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34390009606147937 [2023-09-01 15:02:02,909 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2864 transitions. [2023-09-01 15:02:02,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2864 transitions. [2023-09-01 15:02:02,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:02,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2864 transitions. [2023-09-01 15:02:02,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,915 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:02,915 INFO L175 Difference]: Start difference. First operand has 487 places, 943 transitions, 23082 flow. Second operand 24 states and 2864 transitions. [2023-09-01 15:02:02,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1023 transitions, 26155 flow [2023-09-01 15:02:04,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1023 transitions, 25755 flow, removed 153 selfloop flow, removed 14 redundant places. [2023-09-01 15:02:04,425 INFO L231 Difference]: Finished difference. Result has 503 places, 965 transitions, 23656 flow [2023-09-01 15:02:04,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=22818, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23656, PETRI_PLACES=503, PETRI_TRANSITIONS=965} [2023-09-01 15:02:04,426 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 482 predicate places. [2023-09-01 15:02:04,426 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 965 transitions, 23656 flow [2023-09-01 15:02:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 115.73076923076923) internal successors, (3009), 26 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:04,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:04,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:04,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 15:02:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 15:02:04,633 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:04,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1931491441, now seen corresponding path program 12 times [2023-09-01 15:02:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147252998] [2023-09-01 15:02:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:04,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:04,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147252998] [2023-09-01 15:02:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147252998] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:04,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618769623] [2023-09-01 15:02:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:02:04,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:04,799 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:04,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 15:02:04,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:02:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:02:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:05,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618769623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:05,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-09-01 15:02:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257279875] [2023-09-01 15:02:05,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 15:02:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 15:02:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-09-01 15:02:05,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:02:05,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 965 transitions, 23656 flow. Second operand has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:05,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:05,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:02:05,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:09,177 INFO L130 PetriNetUnfolder]: 3100/6163 cut-off events. [2023-09-01 15:02:09,177 INFO L131 PetriNetUnfolder]: For 201811/201811 co-relation queries the response was YES. [2023-09-01 15:02:09,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61095 conditions, 6163 events. 3100/6163 cut-off events. For 201811/201811 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 48868 event pairs, 874 based on Foata normal form. 48/6210 useless extension candidates. Maximal degree in co-relation 60743. Up to 4519 conditions per place. [2023-09-01 15:02:09,265 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 781 selfloop transitions, 270 changer transitions 0/1051 dead transitions. [2023-09-01 15:02:09,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1051 transitions, 26130 flow [2023-09-01 15:02:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 15:02:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 15:02:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3686 transitions. [2023-09-01 15:02:09,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40855686100642874 [2023-09-01 15:02:09,268 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3686 transitions. [2023-09-01 15:02:09,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3686 transitions. [2023-09-01 15:02:09,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:09,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3686 transitions. [2023-09-01 15:02:09,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 141.76923076923077) internal successors, (3686), 26 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:09,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:09,275 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:09,275 INFO L175 Difference]: Start difference. First operand has 503 places, 965 transitions, 23656 flow. Second operand 26 states and 3686 transitions. [2023-09-01 15:02:09,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1051 transitions, 26130 flow [2023-09-01 15:02:10,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1051 transitions, 25891 flow, removed 51 selfloop flow, removed 12 redundant places. [2023-09-01 15:02:10,721 INFO L231 Difference]: Finished difference. Result has 516 places, 972 transitions, 24071 flow [2023-09-01 15:02:10,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23417, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24071, PETRI_PLACES=516, PETRI_TRANSITIONS=972} [2023-09-01 15:02:10,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 495 predicate places. [2023-09-01 15:02:10,722 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 972 transitions, 24071 flow [2023-09-01 15:02:10,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:10,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:10,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:10,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 15:02:10,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 15:02:10,929 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:10,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:10,929 INFO L85 PathProgramCache]: Analyzing trace with hash -259290172, now seen corresponding path program 13 times [2023-09-01 15:02:10,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:10,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361013633] [2023-09-01 15:02:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:10,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361013633] [2023-09-01 15:02:11,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361013633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070217394] [2023-09-01 15:02:11,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:02:11,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:11,079 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:11,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 15:02:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:11,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:02:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:11,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070217394] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:53,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:53,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-09-01 15:02:53,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924515128] [2023-09-01 15:02:53,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:53,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:02:53,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:02:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-09-01 15:02:54,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:02:54,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 972 transitions, 24071 flow. Second operand has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:54,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:54,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:02:54,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:57,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:03:04,540 INFO L130 PetriNetUnfolder]: 3152/6383 cut-off events. [2023-09-01 15:03:04,540 INFO L131 PetriNetUnfolder]: For 209779/209779 co-relation queries the response was YES. [2023-09-01 15:03:04,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63373 conditions, 6383 events. 3152/6383 cut-off events. For 209779/209779 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 51810 event pairs, 506 based on Foata normal form. 60/6442 useless extension candidates. Maximal degree in co-relation 63098. Up to 2755 conditions per place. [2023-09-01 15:03:04,632 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 631 selfloop transitions, 478 changer transitions 4/1113 dead transitions. [2023-09-01 15:03:04,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1113 transitions, 28363 flow [2023-09-01 15:03:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 15:03:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 15:03:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5092 transitions. [2023-09-01 15:03:04,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762087736151137 [2023-09-01 15:03:04,635 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5092 transitions. [2023-09-01 15:03:04,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5092 transitions. [2023-09-01 15:03:04,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:04,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5092 transitions. [2023-09-01 15:03:04,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 141.44444444444446) internal successors, (5092), 36 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:04,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:04,644 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:04,644 INFO L175 Difference]: Start difference. First operand has 516 places, 972 transitions, 24071 flow. Second operand 36 states and 5092 transitions. [2023-09-01 15:03:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1113 transitions, 28363 flow [2023-09-01 15:03:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1113 transitions, 27772 flow, removed 68 selfloop flow, removed 20 redundant places. [2023-09-01 15:03:06,246 INFO L231 Difference]: Finished difference. Result has 537 places, 1022 transitions, 26219 flow [2023-09-01 15:03:06,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23287, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26219, PETRI_PLACES=537, PETRI_TRANSITIONS=1022} [2023-09-01 15:03:06,247 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 516 predicate places. [2023-09-01 15:03:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1022 transitions, 26219 flow [2023-09-01 15:03:06,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:06,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:06,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:06,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 15:03:06,451 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:06,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1543461211, now seen corresponding path program 14 times [2023-09-01 15:03:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:06,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557202309] [2023-09-01 15:03:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:03:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557202309] [2023-09-01 15:03:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557202309] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:07,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624634216] [2023-09-01 15:03:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:03:07,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:07,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:07,092 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:07,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 15:03:07,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:03:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:03:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:07,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:07,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:03:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:03:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:08,209 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:03:08,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:03:08,351 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:03:08,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:03:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624634216] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:08,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:03:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291649999] [2023-09-01 15:03:08,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:03:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:03:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:03:11,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 347 [2023-09-01 15:03:11,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1022 transitions, 26219 flow. Second operand has 29 states, 29 states have (on average 120.65517241379311) internal successors, (3499), 29 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:11,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:11,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 347 [2023-09-01 15:03:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:15,243 INFO L130 PetriNetUnfolder]: 3168/6417 cut-off events. [2023-09-01 15:03:15,244 INFO L131 PetriNetUnfolder]: For 224130/224130 co-relation queries the response was YES. [2023-09-01 15:03:15,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65830 conditions, 6417 events. 3168/6417 cut-off events. For 224130/224130 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51982 event pairs, 484 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 65462. Up to 5900 conditions per place. [2023-09-01 15:03:15,336 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 971 selfloop transitions, 125 changer transitions 15/1111 dead transitions. [2023-09-01 15:03:15,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1111 transitions, 29248 flow [2023-09-01 15:03:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 15:03:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 15:03:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3852 transitions. [2023-09-01 15:03:15,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580924049456168 [2023-09-01 15:03:15,344 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3852 transitions. [2023-09-01 15:03:15,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3852 transitions. [2023-09-01 15:03:15,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:15,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3852 transitions. [2023-09-01 15:03:15,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 124.25806451612904) internal successors, (3852), 31 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:15,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:15,354 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:15,355 INFO L175 Difference]: Start difference. First operand has 537 places, 1022 transitions, 26219 flow. Second operand 31 states and 3852 transitions. [2023-09-01 15:03:15,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1111 transitions, 29248 flow [2023-09-01 15:03:17,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1111 transitions, 28464 flow, removed 191 selfloop flow, removed 21 redundant places. [2023-09-01 15:03:17,076 INFO L231 Difference]: Finished difference. Result has 554 places, 1035 transitions, 26181 flow [2023-09-01 15:03:17,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25416, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26181, PETRI_PLACES=554, PETRI_TRANSITIONS=1035} [2023-09-01 15:03:17,077 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 533 predicate places. [2023-09-01 15:03:17,077 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1035 transitions, 26181 flow [2023-09-01 15:03:17,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 120.65517241379311) internal successors, (3499), 29 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:17,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:17,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:17,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:17,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 15:03:17,279 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:17,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1051477855, now seen corresponding path program 15 times [2023-09-01 15:03:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:17,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355378707] [2023-09-01 15:03:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:03:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355378707] [2023-09-01 15:03:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355378707] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227742601] [2023-09-01 15:03:18,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:03:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:18,004 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 15:03:18,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:03:18,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:03:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:18,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:18,380 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:03:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:03:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:18,958 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:03:18,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:03:19,083 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:03:19,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:03:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227742601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:19,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:19,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:03:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351268962] [2023-09-01 15:03:19,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:03:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:03:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:03:21,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:03:21,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1035 transitions, 26181 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:21,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:21,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:03:21,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:25,907 INFO L130 PetriNetUnfolder]: 3181/6436 cut-off events. [2023-09-01 15:03:25,908 INFO L131 PetriNetUnfolder]: For 205506/205506 co-relation queries the response was YES. [2023-09-01 15:03:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64804 conditions, 6436 events. 3181/6436 cut-off events. For 205506/205506 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51860 event pairs, 490 based on Foata normal form. 4/6439 useless extension candidates. Maximal degree in co-relation 64441. Up to 5926 conditions per place. [2023-09-01 15:03:26,005 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 969 selfloop transitions, 139 changer transitions 17/1125 dead transitions. [2023-09-01 15:03:26,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1125 transitions, 29024 flow [2023-09-01 15:03:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 15:03:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 15:03:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3910 transitions. [2023-09-01 15:03:26,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414548947690158 [2023-09-01 15:03:26,008 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3910 transitions. [2023-09-01 15:03:26,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3910 transitions. [2023-09-01 15:03:26,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:26,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3910 transitions. [2023-09-01 15:03:26,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 118.48484848484848) internal successors, (3910), 33 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:26,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:26,016 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:26,016 INFO L175 Difference]: Start difference. First operand has 554 places, 1035 transitions, 26181 flow. Second operand 33 states and 3910 transitions. [2023-09-01 15:03:26,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1125 transitions, 29024 flow [2023-09-01 15:03:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1125 transitions, 28741 flow, removed 43 selfloop flow, removed 23 redundant places. [2023-09-01 15:03:27,663 INFO L231 Difference]: Finished difference. Result has 565 places, 1040 transitions, 26390 flow [2023-09-01 15:03:27,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25898, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26390, PETRI_PLACES=565, PETRI_TRANSITIONS=1040} [2023-09-01 15:03:27,663 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-09-01 15:03:27,664 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1040 transitions, 26390 flow [2023-09-01 15:03:27,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:27,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:27,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:27,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:27,865 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:27,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash 546417695, now seen corresponding path program 16 times [2023-09-01 15:03:27,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649040826] [2023-09-01 15:03:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:03:28,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649040826] [2023-09-01 15:03:28,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649040826] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:28,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452312964] [2023-09-01 15:03:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:03:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:28,552 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:28,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 15:03:28,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:03:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:03:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:28,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:03:28,900 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:03:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:03:28,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:29,499 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:03:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:03:29,610 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:03:29,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:03:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:29,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452312964] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:29,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:29,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-09-01 15:03:29,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57369264] [2023-09-01 15:03:29,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 15:03:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:29,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 15:03:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-09-01 15:03:32,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 347 [2023-09-01 15:03:32,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1040 transitions, 26390 flow. Second operand has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:32,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:32,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 347 [2023-09-01 15:03:32,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:37,072 INFO L130 PetriNetUnfolder]: 3250/6555 cut-off events. [2023-09-01 15:03:37,073 INFO L131 PetriNetUnfolder]: For 212501/212501 co-relation queries the response was YES. [2023-09-01 15:03:37,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66546 conditions, 6555 events. 3250/6555 cut-off events. For 212501/212501 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53002 event pairs, 445 based on Foata normal form. 5/6559 useless extension candidates. Maximal degree in co-relation 66179. Up to 6016 conditions per place. [2023-09-01 15:03:37,173 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1003 selfloop transitions, 135 changer transitions 14/1152 dead transitions. [2023-09-01 15:03:37,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1152 transitions, 29881 flow [2023-09-01 15:03:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 15:03:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 15:03:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3805 transitions. [2023-09-01 15:03:37,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537231570140374 [2023-09-01 15:03:37,177 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3805 transitions. [2023-09-01 15:03:37,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3805 transitions. [2023-09-01 15:03:37,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:37,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3805 transitions. [2023-09-01 15:03:37,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 122.74193548387096) internal successors, (3805), 31 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:37,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:37,189 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:37,189 INFO L175 Difference]: Start difference. First operand has 565 places, 1040 transitions, 26390 flow. Second operand 31 states and 3805 transitions. [2023-09-01 15:03:37,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1152 transitions, 29881 flow [2023-09-01 15:03:38,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1152 transitions, 29609 flow, removed 36 selfloop flow, removed 22 redundant places. [2023-09-01 15:03:38,979 INFO L231 Difference]: Finished difference. Result has 579 places, 1065 transitions, 27211 flow [2023-09-01 15:03:38,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26118, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27211, PETRI_PLACES=579, PETRI_TRANSITIONS=1065} [2023-09-01 15:03:38,980 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 558 predicate places. [2023-09-01 15:03:38,980 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1065 transitions, 27211 flow [2023-09-01 15:03:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:38,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:38,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:38,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-09-01 15:03:39,185 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:39,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -213905598, now seen corresponding path program 17 times [2023-09-01 15:03:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:39,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30612102] [2023-09-01 15:03:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30612102] [2023-09-01 15:03:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30612102] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632657805] [2023-09-01 15:03:39,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:03:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:39,370 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:39,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 15:03:39,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:03:39,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 15:03:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:39,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 15:03:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632657805] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:39,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 15 [2023-09-01 15:03:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772670394] [2023-09-01 15:03:39,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 15:03:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 15:03:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 15:03:39,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:03:39,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1065 transitions, 27211 flow. Second operand has 15 states, 15 states have (on average 138.13333333333333) internal successors, (2072), 15 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:39,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:39,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:03:39,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:43,424 INFO L130 PetriNetUnfolder]: 3398/6795 cut-off events. [2023-09-01 15:03:43,425 INFO L131 PetriNetUnfolder]: For 233820/233820 co-relation queries the response was YES. [2023-09-01 15:03:43,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70103 conditions, 6795 events. 3398/6795 cut-off events. For 233820/233820 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 54901 event pairs, 103 based on Foata normal form. 60/6854 useless extension candidates. Maximal degree in co-relation 69728. Up to 2200 conditions per place. [2023-09-01 15:03:43,540 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 640 selfloop transitions, 644 changer transitions 4/1288 dead transitions. [2023-09-01 15:03:43,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1288 transitions, 34763 flow [2023-09-01 15:03:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 15:03:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 15:03:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3395 transitions. [2023-09-01 15:03:43,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40766090297790586 [2023-09-01 15:03:43,543 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3395 transitions. [2023-09-01 15:03:43,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3395 transitions. [2023-09-01 15:03:43,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:43,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3395 transitions. [2023-09-01 15:03:43,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 141.45833333333334) internal successors, (3395), 24 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:43,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:43,549 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:43,549 INFO L175 Difference]: Start difference. First operand has 579 places, 1065 transitions, 27211 flow. Second operand 24 states and 3395 transitions. [2023-09-01 15:03:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1288 transitions, 34763 flow [2023-09-01 15:03:45,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1288 transitions, 34238 flow, removed 112 selfloop flow, removed 27 redundant places. [2023-09-01 15:03:45,592 INFO L231 Difference]: Finished difference. Result has 580 places, 1148 transitions, 30694 flow [2023-09-01 15:03:45,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26633, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30694, PETRI_PLACES=580, PETRI_TRANSITIONS=1148} [2023-09-01 15:03:45,593 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-09-01 15:03:45,593 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1148 transitions, 30694 flow [2023-09-01 15:03:45,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.13333333333333) internal successors, (2072), 15 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:45,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:45,594 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:45,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:45,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:45,794 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:45,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:45,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1679609131, now seen corresponding path program 13 times [2023-09-01 15:03:45,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:45,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053796497] [2023-09-01 15:03:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:45,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053796497] [2023-09-01 15:03:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053796497] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373214688] [2023-09-01 15:03:45,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:03:45,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:45,961 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:45,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 15:03:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:46,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:46,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:46,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373214688] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:46,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:46,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-09-01 15:03:46,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280725983] [2023-09-01 15:03:46,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:46,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:03:46,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:03:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-09-01 15:03:46,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:03:46,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1148 transitions, 30694 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:46,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:46,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:03:46,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:52,184 INFO L130 PetriNetUnfolder]: 4418/8625 cut-off events. [2023-09-01 15:03:52,184 INFO L131 PetriNetUnfolder]: For 311446/311446 co-relation queries the response was YES. [2023-09-01 15:03:52,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91283 conditions, 8625 events. 4418/8625 cut-off events. For 311446/311446 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 71001 event pairs, 74 based on Foata normal form. 28/8652 useless extension candidates. Maximal degree in co-relation 90894. Up to 2253 conditions per place. [2023-09-01 15:03:52,317 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 507 selfloop transitions, 1030 changer transitions 0/1537 dead transitions. [2023-09-01 15:03:52,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1537 transitions, 41856 flow [2023-09-01 15:03:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 15:03:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 15:03:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5259 transitions. [2023-09-01 15:03:52,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096113404470753 [2023-09-01 15:03:52,321 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5259 transitions. [2023-09-01 15:03:52,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5259 transitions. [2023-09-01 15:03:52,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:52,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5259 transitions. [2023-09-01 15:03:52,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 142.13513513513513) internal successors, (5259), 37 states have internal predecessors, (5259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:52,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:52,329 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:52,329 INFO L175 Difference]: Start difference. First operand has 580 places, 1148 transitions, 30694 flow. Second operand 37 states and 5259 transitions. [2023-09-01 15:03:52,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1537 transitions, 41856 flow [2023-09-01 15:03:55,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1537 transitions, 40470 flow, removed 435 selfloop flow, removed 12 redundant places. [2023-09-01 15:03:55,212 INFO L231 Difference]: Finished difference. Result has 605 places, 1366 transitions, 37792 flow [2023-09-01 15:03:55,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=29652, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=37792, PETRI_PLACES=605, PETRI_TRANSITIONS=1366} [2023-09-01 15:03:55,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 584 predicate places. [2023-09-01 15:03:55,214 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1366 transitions, 37792 flow [2023-09-01 15:03:55,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:55,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:55,215 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:55,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:55,423 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:55,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 204373709, now seen corresponding path program 14 times [2023-09-01 15:03:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:55,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858702476] [2023-09-01 15:03:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:55,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858702476] [2023-09-01 15:03:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858702476] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047992034] [2023-09-01 15:03:55,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:03:55,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:55,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:55,563 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:55,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 15:03:55,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:03:55,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:55,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:56,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047992034] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:56,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:56,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-09-01 15:03:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545124545] [2023-09-01 15:03:56,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:56,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:03:56,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:03:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-09-01 15:03:56,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:03:56,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1366 transitions, 37792 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:56,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:56,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:03:56,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:01,082 INFO L130 PetriNetUnfolder]: 4443/8652 cut-off events. [2023-09-01 15:04:01,082 INFO L131 PetriNetUnfolder]: For 281789/281789 co-relation queries the response was YES. [2023-09-01 15:04:01,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91668 conditions, 8652 events. 4443/8652 cut-off events. For 281789/281789 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 71067 event pairs, 74 based on Foata normal form. 4/8655 useless extension candidates. Maximal degree in co-relation 91296. Up to 2263 conditions per place. [2023-09-01 15:04:01,215 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 501 selfloop transitions, 1023 changer transitions 0/1524 dead transitions. [2023-09-01 15:04:01,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1524 transitions, 43203 flow [2023-09-01 15:04:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 15:04:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 15:04:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3861 transitions. [2023-09-01 15:04:01,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41210374639769454 [2023-09-01 15:04:01,218 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3861 transitions. [2023-09-01 15:04:01,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3861 transitions. [2023-09-01 15:04:01,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:01,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3861 transitions. [2023-09-01 15:04:01,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 143.0) internal successors, (3861), 27 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:01,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:01,224 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:01,224 INFO L175 Difference]: Start difference. First operand has 605 places, 1366 transitions, 37792 flow. Second operand 27 states and 3861 transitions. [2023-09-01 15:04:01,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1524 transitions, 43203 flow [2023-09-01 15:04:04,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1524 transitions, 41009 flow, removed 591 selfloop flow, removed 16 redundant places. [2023-09-01 15:04:04,223 INFO L231 Difference]: Finished difference. Result has 618 places, 1378 transitions, 38606 flow [2023-09-01 15:04:04,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=35582, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38606, PETRI_PLACES=618, PETRI_TRANSITIONS=1378} [2023-09-01 15:04:04,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-09-01 15:04:04,224 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1378 transitions, 38606 flow [2023-09-01 15:04:04,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:04,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:04,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:04,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 15:04:04,434 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:04:04,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1894697581, now seen corresponding path program 18 times [2023-09-01 15:04:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395645031] [2023-09-01 15:04:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:04,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:04:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395645031] [2023-09-01 15:04:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395645031] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955430483] [2023-09-01 15:04:05,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:04:05,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:05,292 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:04:05,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 15:04:05,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:04:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:04:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:05,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:04:05,694 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:04:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:05,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:06,315 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:04:06,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:04:06,425 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:04:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:04:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955430483] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:06,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:06,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:04:06,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654970104] [2023-09-01 15:04:06,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:06,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:04:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:04:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:04:10,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:04:10,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1378 transitions, 38606 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:10,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:10,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:04:10,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:18,377 INFO L130 PetriNetUnfolder]: 4663/9052 cut-off events. [2023-09-01 15:04:18,377 INFO L131 PetriNetUnfolder]: For 292736/292736 co-relation queries the response was YES. [2023-09-01 15:04:18,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 9052 events. 4663/9052 cut-off events. For 292736/292736 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 74680 event pairs, 534 based on Foata normal form. 8/9059 useless extension candidates. Maximal degree in co-relation 95557. Up to 8328 conditions per place. [2023-09-01 15:04:18,523 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1340 selfloop transitions, 238 changer transitions 19/1597 dead transitions. [2023-09-01 15:04:18,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1597 transitions, 45312 flow [2023-09-01 15:04:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 15:04:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 15:04:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5695 transitions. [2023-09-01 15:04:18,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341918828049952 [2023-09-01 15:04:18,527 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5695 transitions. [2023-09-01 15:04:18,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5695 transitions. [2023-09-01 15:04:18,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:18,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5695 transitions. [2023-09-01 15:04:18,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 118.64583333333333) internal successors, (5695), 48 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:18,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:18,538 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:18,538 INFO L175 Difference]: Start difference. First operand has 618 places, 1378 transitions, 38606 flow. Second operand 48 states and 5695 transitions. [2023-09-01 15:04:18,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1597 transitions, 45312 flow [2023-09-01 15:04:21,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1597 transitions, 44426 flow, removed 10 selfloop flow, removed 16 redundant places. [2023-09-01 15:04:21,866 INFO L231 Difference]: Finished difference. Result has 667 places, 1471 transitions, 41264 flow [2023-09-01 15:04:21,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=37825, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=41264, PETRI_PLACES=667, PETRI_TRANSITIONS=1471} [2023-09-01 15:04:21,867 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 646 predicate places. [2023-09-01 15:04:21,867 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1471 transitions, 41264 flow [2023-09-01 15:04:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:21,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:22,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 15:04:22,073 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:04:22,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash 137009307, now seen corresponding path program 19 times [2023-09-01 15:04:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630673277] [2023-09-01 15:04:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:04:23,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630673277] [2023-09-01 15:04:23,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630673277] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:23,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186181511] [2023-09-01 15:04:23,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:04:23,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:23,043 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:04:23,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 15:04:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:04:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:23,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:04:23,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-09-01 15:04:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:23,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:24,152 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:04:24,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:04:24,278 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:04:24,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:04:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186181511] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:24,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:24,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-09-01 15:04:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58857467] [2023-09-01 15:04:24,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:24,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 15:04:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:24,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 15:04:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-09-01 15:04:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-09-01 15:04:26,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1471 transitions, 41264 flow. Second operand has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:26,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:26,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-09-01 15:04:26,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:32,480 INFO L130 PetriNetUnfolder]: 4646/9012 cut-off events. [2023-09-01 15:04:32,481 INFO L131 PetriNetUnfolder]: For 291498/291498 co-relation queries the response was YES. [2023-09-01 15:04:32,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96300 conditions, 9012 events. 4646/9012 cut-off events. For 291498/291498 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 73947 event pairs, 553 based on Foata normal form. 1/9012 useless extension candidates. Maximal degree in co-relation 95828. Up to 8547 conditions per place. [2023-09-01 15:04:32,626 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1374 selfloop transitions, 139 changer transitions 8/1521 dead transitions. [2023-09-01 15:04:32,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1521 transitions, 44543 flow [2023-09-01 15:04:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:04:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:04:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2745 transitions. [2023-09-01 15:04:32,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439418619220649 [2023-09-01 15:04:32,628 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2745 transitions. [2023-09-01 15:04:32,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2745 transitions. [2023-09-01 15:04:32,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:32,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2745 transitions. [2023-09-01 15:04:32,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 119.34782608695652) internal successors, (2745), 23 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:32,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:32,633 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:32,634 INFO L175 Difference]: Start difference. First operand has 667 places, 1471 transitions, 41264 flow. Second operand 23 states and 2745 transitions. [2023-09-01 15:04:32,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1521 transitions, 44543 flow [2023-09-01 15:04:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1521 transitions, 43500 flow, removed 169 selfloop flow, removed 22 redundant places. [2023-09-01 15:04:36,227 INFO L231 Difference]: Finished difference. Result has 669 places, 1473 transitions, 40581 flow [2023-09-01 15:04:36,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40221, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40581, PETRI_PLACES=669, PETRI_TRANSITIONS=1473} [2023-09-01 15:04:36,229 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 648 predicate places. [2023-09-01 15:04:36,229 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 1473 transitions, 40581 flow [2023-09-01 15:04:36,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:36,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:36,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:36,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-09-01 15:04:36,430 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:04:36,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash -429871751, now seen corresponding path program 15 times [2023-09-01 15:04:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:36,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018613373] [2023-09-01 15:04:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:36,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:36,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018613373] [2023-09-01 15:04:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018613373] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46471514] [2023-09-01 15:04:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:04:36,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:36,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:36,649 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:04:36,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 15:04:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:04:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:04:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:36,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46471514] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:37,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-09-01 15:04:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863746194] [2023-09-01 15:04:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:37,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 15:04:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 15:04:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-09-01 15:04:37,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:04:37,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1473 transitions, 40581 flow. Second operand has 15 states, 15 states have (on average 138.0) internal successors, (2070), 15 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:37,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:37,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:04:37,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:43,545 INFO L130 PetriNetUnfolder]: 4673/9066 cut-off events. [2023-09-01 15:04:43,545 INFO L131 PetriNetUnfolder]: For 289567/289567 co-relation queries the response was YES. [2023-09-01 15:04:43,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9066 events. 4673/9066 cut-off events. For 289567/289567 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 74691 event pairs, 305 based on Foata normal form. 24/9089 useless extension candidates. Maximal degree in co-relation 95474. Up to 2936 conditions per place. [2023-09-01 15:04:43,697 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 662 selfloop transitions, 939 changer transitions 0/1601 dead transitions. [2023-09-01 15:04:43,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1601 transitions, 45585 flow [2023-09-01 15:04:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 15:04:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 15:04:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3823 transitions. [2023-09-01 15:04:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080478172697193 [2023-09-01 15:04:43,700 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3823 transitions. [2023-09-01 15:04:43,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3823 transitions. [2023-09-01 15:04:43,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:43,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3823 transitions. [2023-09-01 15:04:43,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 141.59259259259258) internal successors, (3823), 27 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:43,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:43,706 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:43,706 INFO L175 Difference]: Start difference. First operand has 669 places, 1473 transitions, 40581 flow. Second operand 27 states and 3823 transitions. [2023-09-01 15:04:43,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1601 transitions, 45585 flow [2023-09-01 15:04:47,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 1601 transitions, 45287 flow, removed 24 selfloop flow, removed 18 redundant places. [2023-09-01 15:04:47,386 INFO L231 Difference]: Finished difference. Result has 679 places, 1483 transitions, 42377 flow [2023-09-01 15:04:47,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40287, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=931, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=42377, PETRI_PLACES=679, PETRI_TRANSITIONS=1483} [2023-09-01 15:04:47,387 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 658 predicate places. [2023-09-01 15:04:47,387 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 1483 transitions, 42377 flow [2023-09-01 15:04:47,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.0) internal successors, (2070), 15 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:47,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:47,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:47,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 15:04:47,588 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:04:47,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash 155443333, now seen corresponding path program 20 times [2023-09-01 15:04:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397490565] [2023-09-01 15:04:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:04:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397490565] [2023-09-01 15:04:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397490565] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:48,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485630857] [2023-09-01 15:04:48,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:04:48,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:48,335 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:04:48,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 15:04:48,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:04:48,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:04:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:04:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:48,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:04:48,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-09-01 15:04:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:04:48,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:49,851 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:04:49,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:04:49,981 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:04:49,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:04:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:50,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485630857] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:50,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:50,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-09-01 15:04:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972323528] [2023-09-01 15:04:50,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 15:04:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 15:04:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-09-01 15:04:52,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-09-01 15:04:52,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1483 transitions, 42377 flow. Second operand has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:52,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:52,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-09-01 15:04:52,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:59,563 INFO L130 PetriNetUnfolder]: 5377/10221 cut-off events. [2023-09-01 15:04:59,563 INFO L131 PetriNetUnfolder]: For 334484/334484 co-relation queries the response was YES. [2023-09-01 15:04:59,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110787 conditions, 10221 events. 5377/10221 cut-off events. For 334484/334484 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 84484 event pairs, 589 based on Foata normal form. 3/10223 useless extension candidates. Maximal degree in co-relation 110263. Up to 8683 conditions per place. [2023-09-01 15:04:59,739 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1447 selfloop transitions, 315 changer transitions 10/1772 dead transitions. [2023-09-01 15:04:59,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1772 transitions, 52117 flow [2023-09-01 15:04:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 15:04:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 15:04:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3599 transitions. [2023-09-01 15:04:59,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457252641690682 [2023-09-01 15:04:59,742 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3599 transitions. [2023-09-01 15:04:59,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3599 transitions. [2023-09-01 15:04:59,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:59,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3599 transitions. [2023-09-01 15:04:59,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 119.96666666666667) internal successors, (3599), 30 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,749 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:59,749 INFO L175 Difference]: Start difference. First operand has 679 places, 1483 transitions, 42377 flow. Second operand 30 states and 3599 transitions. [2023-09-01 15:04:59,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1772 transitions, 52117 flow [2023-09-01 15:05:04,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1772 transitions, 51256 flow, removed 122 selfloop flow, removed 16 redundant places. [2023-09-01 15:05:04,059 INFO L231 Difference]: Finished difference. Result has 701 places, 1612 transitions, 46772 flow [2023-09-01 15:05:04,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=41636, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=46772, PETRI_PLACES=701, PETRI_TRANSITIONS=1612} [2023-09-01 15:05:04,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 680 predicate places. [2023-09-01 15:05:04,061 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 1612 transitions, 46772 flow [2023-09-01 15:05:04,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:04,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:04,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:04,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 15:05:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:04,262 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:05:04,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1526177793, now seen corresponding path program 21 times [2023-09-01 15:05:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751180559] [2023-09-01 15:05:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:04,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:04,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751180559] [2023-09-01 15:05:04,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751180559] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:04,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40056867] [2023-09-01 15:05:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:05:04,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:04,752 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:05:04,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 15:05:04,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 15:05:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 15:05:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:04,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-09-01 15:05:05,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:05:05,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:05:05,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:05,298 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-09-01 15:05:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:05,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:08,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:08,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 106 [2023-09-01 15:05:08,242 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-09-01 15:05:08,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 571 [2023-09-01 15:05:08,359 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-09-01 15:05:08,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 133 [2023-09-01 15:05:08,473 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-09-01 15:05:08,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 136 [2023-09-01 15:05:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:08,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40056867] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:08,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-09-01 15:05:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279008689] [2023-09-01 15:05:08,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 15:05:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 15:05:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=795, Unknown=4, NotChecked=0, Total=992 [2023-09-01 15:05:11,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:13,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:17,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:17,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-09-01 15:05:17,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 1612 transitions, 46772 flow. Second operand has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:17,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:17,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-09-01 15:05:17,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:26,579 INFO L130 PetriNetUnfolder]: 5533/10483 cut-off events. [2023-09-01 15:05:26,579 INFO L131 PetriNetUnfolder]: For 355828/355828 co-relation queries the response was YES. [2023-09-01 15:05:26,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115183 conditions, 10483 events. 5533/10483 cut-off events. For 355828/355828 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 86750 event pairs, 676 based on Foata normal form. 10/10492 useless extension candidates. Maximal degree in co-relation 114598. Up to 10010 conditions per place. [2023-09-01 15:05:26,879 INFO L137 encePairwiseOnDemand]: 334/347 looper letters, 1574 selfloop transitions, 161 changer transitions 23/1758 dead transitions. [2023-09-01 15:05:26,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1758 transitions, 52693 flow [2023-09-01 15:05:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 15:05:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 15:05:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2972 transitions. [2023-09-01 15:05:26,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22539056575155467 [2023-09-01 15:05:26,882 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2972 transitions. [2023-09-01 15:05:26,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2972 transitions. [2023-09-01 15:05:26,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:26,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2972 transitions. [2023-09-01 15:05:26,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 78.21052631578948) internal successors, (2972), 38 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:26,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:26,891 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:26,891 INFO L175 Difference]: Start difference. First operand has 701 places, 1612 transitions, 46772 flow. Second operand 38 states and 2972 transitions. [2023-09-01 15:05:26,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1758 transitions, 52693 flow [2023-09-01 15:05:31,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1758 transitions, 52320 flow, removed 72 selfloop flow, removed 21 redundant places. [2023-09-01 15:05:31,184 INFO L231 Difference]: Finished difference. Result has 732 places, 1667 transitions, 48621 flow [2023-09-01 15:05:31,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46400, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=48621, PETRI_PLACES=732, PETRI_TRANSITIONS=1667} [2023-09-01 15:05:31,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 711 predicate places. [2023-09-01 15:05:31,185 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 1667 transitions, 48621 flow [2023-09-01 15:05:31,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:31,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:31,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 15:05:31,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 15:05:31,387 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:05:31,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1921224719, now seen corresponding path program 22 times [2023-09-01 15:05:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836760015] [2023-09-01 15:05:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836760015] [2023-09-01 15:05:32,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836760015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29963790] [2023-09-01 15:05:32,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:05:32,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:32,285 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:05:32,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 15:05:32,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:05:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 15:05:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:32,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:32,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-09-01 15:05:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:33,215 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:05:33,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:05:33,333 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:05:33,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:05:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:33,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29963790] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:33,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:33,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-09-01 15:05:33,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488526583] [2023-09-01 15:05:33,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:33,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 15:05:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 15:05:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-09-01 15:05:35,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 347 [2023-09-01 15:05:35,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 1667 transitions, 48621 flow. Second operand has 27 states, 27 states have (on average 116.74074074074075) internal successors, (3152), 27 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:35,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:05:35,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 347 [2023-09-01 15:05:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:05:43,013 INFO L130 PetriNetUnfolder]: 5595/10738 cut-off events. [2023-09-01 15:05:43,014 INFO L131 PetriNetUnfolder]: For 377337/377337 co-relation queries the response was YES. [2023-09-01 15:05:43,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119067 conditions, 10738 events. 5595/10738 cut-off events. For 377337/377337 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 90494 event pairs, 869 based on Foata normal form. 3/10740 useless extension candidates. Maximal degree in co-relation 118451. Up to 8760 conditions per place. [2023-09-01 15:05:43,201 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1531 selfloop transitions, 355 changer transitions 8/1894 dead transitions. [2023-09-01 15:05:43,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 1894 transitions, 56525 flow [2023-09-01 15:05:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 15:05:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 15:05:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3972 transitions. [2023-09-01 15:05:43,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468692690594708 [2023-09-01 15:05:43,204 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3972 transitions. [2023-09-01 15:05:43,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3972 transitions. [2023-09-01 15:05:43,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:05:43,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3972 transitions. [2023-09-01 15:05:43,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 120.36363636363636) internal successors, (3972), 33 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:43,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:43,211 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:43,211 INFO L175 Difference]: Start difference. First operand has 732 places, 1667 transitions, 48621 flow. Second operand 33 states and 3972 transitions. [2023-09-01 15:05:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 1894 transitions, 56525 flow [2023-09-01 15:05:48,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1894 transitions, 55885 flow, removed 213 selfloop flow, removed 20 redundant places. [2023-09-01 15:05:48,063 INFO L231 Difference]: Finished difference. Result has 752 places, 1725 transitions, 50944 flow [2023-09-01 15:05:48,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=47989, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=50944, PETRI_PLACES=752, PETRI_TRANSITIONS=1725} [2023-09-01 15:05:48,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2023-09-01 15:05:48,064 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 1725 transitions, 50944 flow [2023-09-01 15:05:48,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.74074074074075) internal successors, (3152), 27 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:05:48,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:05:48,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:05:48,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 15:05:48,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:48,265 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:05:48,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:05:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1610738549, now seen corresponding path program 23 times [2023-09-01 15:05:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:05:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085980979] [2023-09-01 15:05:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:05:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:05:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:05:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:05:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:05:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085980979] [2023-09-01 15:05:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085980979] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:05:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70100377] [2023-09-01 15:05:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:05:50,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:05:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:05:50,696 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:05:50,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 15:05:50,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:05:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:05:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 15:05:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:05:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:05:51,101 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 22 treesize of output 22 [2023-09-01 15:05:52,989 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2023-09-01 15:05:52,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 39 [2023-09-01 15:05:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:05:52,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:05:54,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:54,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-09-01 15:05:54,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:05:54,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 36 [2023-09-01 15:05:54,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:05:54,320 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:05:54,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:05:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:05:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70100377] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:05:54,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:05:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-09-01 15:05:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390761347] [2023-09-01 15:05:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:05:54,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:05:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:05:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:05:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=951, Unknown=2, NotChecked=0, Total=1056 [2023-09-01 15:05:57,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:05:59,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:01,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:03,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:10,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:14,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:17,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 15:06:18,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:06:18,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 1725 transitions, 50944 flow. Second operand has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:18,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:06:18,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:06:18,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:06:30,615 INFO L130 PetriNetUnfolder]: 5806/11159 cut-off events. [2023-09-01 15:06:30,615 INFO L131 PetriNetUnfolder]: For 397161/397161 co-relation queries the response was YES. [2023-09-01 15:06:30,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124735 conditions, 11159 events. 5806/11159 cut-off events. For 397161/397161 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 94878 event pairs, 431 based on Foata normal form. 9/11167 useless extension candidates. Maximal degree in co-relation 124160. Up to 9587 conditions per place. [2023-09-01 15:06:30,830 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1480 selfloop transitions, 427 changer transitions 22/1929 dead transitions. [2023-09-01 15:06:30,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 1929 transitions, 57877 flow [2023-09-01 15:06:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 15:06:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 15:06:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3893 transitions. [2023-09-01 15:06:30,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26090744588164333 [2023-09-01 15:06:30,834 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3893 transitions. [2023-09-01 15:06:30,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3893 transitions. [2023-09-01 15:06:30,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:06:30,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3893 transitions. [2023-09-01 15:06:30,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.53488372093024) internal successors, (3893), 43 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:30,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:30,843 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:30,843 INFO L175 Difference]: Start difference. First operand has 752 places, 1725 transitions, 50944 flow. Second operand 43 states and 3893 transitions. [2023-09-01 15:06:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 1929 transitions, 57877 flow [2023-09-01 15:06:36,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1929 transitions, 57396 flow, removed 114 selfloop flow, removed 15 redundant places. [2023-09-01 15:06:36,153 INFO L231 Difference]: Finished difference. Result has 791 places, 1805 transitions, 53798 flow [2023-09-01 15:06:36,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=50467, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=53798, PETRI_PLACES=791, PETRI_TRANSITIONS=1805} [2023-09-01 15:06:36,155 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 770 predicate places. [2023-09-01 15:06:36,155 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 1805 transitions, 53798 flow [2023-09-01 15:06:36,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:36,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:06:36,156 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:06:36,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 15:06:36,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-09-01 15:06:36,365 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:06:36,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:06:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1671129951, now seen corresponding path program 24 times [2023-09-01 15:06:36,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:06:36,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717235249] [2023-09-01 15:06:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:06:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:06:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:06:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:06:37,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:06:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717235249] [2023-09-01 15:06:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717235249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:06:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575739723] [2023-09-01 15:06:37,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:06:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:06:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:06:37,374 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:06:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 15:06:37,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:06:37,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:06:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:06:37,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:06:37,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:06:37,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:06:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:06:37,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:06:38,526 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:06:38,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:06:38,636 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:06:38,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:06:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575739723] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:06:38,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:06:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-09-01 15:06:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222371505] [2023-09-01 15:06:38,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:06:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 15:06:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:06:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 15:06:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-09-01 15:06:42,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-09-01 15:06:42,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1805 transitions, 53798 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:42,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:06:42,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-09-01 15:06:42,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:06:52,192 INFO L130 PetriNetUnfolder]: 5799/11153 cut-off events. [2023-09-01 15:06:52,192 INFO L131 PetriNetUnfolder]: For 423913/423913 co-relation queries the response was YES. [2023-09-01 15:06:52,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127102 conditions, 11153 events. 5799/11153 cut-off events. For 423913/423913 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 95113 event pairs, 987 based on Foata normal form. 7/11159 useless extension candidates. Maximal degree in co-relation 126670. Up to 10559 conditions per place. [2023-09-01 15:06:52,419 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1676 selfloop transitions, 201 changer transitions 17/1894 dead transitions. [2023-09-01 15:06:52,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 1894 transitions, 58180 flow [2023-09-01 15:06:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 15:06:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 15:06:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4497 transitions. [2023-09-01 15:06:52,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410435310177461 [2023-09-01 15:06:52,422 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4497 transitions. [2023-09-01 15:06:52,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4497 transitions. [2023-09-01 15:06:52,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:06:52,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4497 transitions. [2023-09-01 15:06:52,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 118.34210526315789) internal successors, (4497), 38 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:52,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:52,431 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:52,431 INFO L175 Difference]: Start difference. First operand has 791 places, 1805 transitions, 53798 flow. Second operand 38 states and 4497 transitions. [2023-09-01 15:06:52,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 1894 transitions, 58180 flow [2023-09-01 15:06:58,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1894 transitions, 57577 flow, removed 164 selfloop flow, removed 24 redundant places. [2023-09-01 15:06:58,043 INFO L231 Difference]: Finished difference. Result has 809 places, 1811 transitions, 53869 flow [2023-09-01 15:06:58,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53136, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=53869, PETRI_PLACES=809, PETRI_TRANSITIONS=1811} [2023-09-01 15:06:58,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2023-09-01 15:06:58,044 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 1811 transitions, 53869 flow [2023-09-01 15:06:58,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:58,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:06:58,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:06:58,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-09-01 15:06:58,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:06:58,245 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:06:58,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:06:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1457871291, now seen corresponding path program 16 times [2023-09-01 15:06:58,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:06:58,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432835970] [2023-09-01 15:06:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:06:58,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:06:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:06:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:58,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:06:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432835970] [2023-09-01 15:06:58,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432835970] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:06:58,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250756281] [2023-09-01 15:06:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:06:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:06:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:06:58,443 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:06:58,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 15:06:58,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:06:58,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:06:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:06:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:06:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:58,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:06:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250756281] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:06:59,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:06:59,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-09-01 15:06:59,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142259501] [2023-09-01 15:06:59,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:06:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 15:06:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:06:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 15:06:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-09-01 15:06:59,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:06:59,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 1811 transitions, 53869 flow. Second operand has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:59,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:06:59,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:06:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:07:07,607 INFO L130 PetriNetUnfolder]: 5832/11243 cut-off events. [2023-09-01 15:07:07,607 INFO L131 PetriNetUnfolder]: For 430755/430755 co-relation queries the response was YES. [2023-09-01 15:07:07,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128058 conditions, 11243 events. 5832/11243 cut-off events. For 430755/430755 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 96150 event pairs, 1741 based on Foata normal form. 48/11290 useless extension candidates. Maximal degree in co-relation 127491. Up to 9243 conditions per place. [2023-09-01 15:07:07,834 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1403 selfloop transitions, 490 changer transitions 0/1893 dead transitions. [2023-09-01 15:07:07,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 1893 transitions, 58522 flow [2023-09-01 15:07:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:07:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:07:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3253 transitions. [2023-09-01 15:07:07,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40759303345445436 [2023-09-01 15:07:07,836 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3253 transitions. [2023-09-01 15:07:07,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3253 transitions. [2023-09-01 15:07:07,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:07:07,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3253 transitions. [2023-09-01 15:07:07,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.43478260869566) internal successors, (3253), 23 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:07,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:07,842 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:07,842 INFO L175 Difference]: Start difference. First operand has 809 places, 1811 transitions, 53869 flow. Second operand 23 states and 3253 transitions. [2023-09-01 15:07:07,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 1893 transitions, 58522 flow [2023-09-01 15:07:14,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 1893 transitions, 58191 flow, removed 56 selfloop flow, removed 29 redundant places. [2023-09-01 15:07:14,182 INFO L231 Difference]: Finished difference. Result has 802 places, 1820 transitions, 54803 flow [2023-09-01 15:07:14,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53550, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54803, PETRI_PLACES=802, PETRI_TRANSITIONS=1820} [2023-09-01 15:07:14,183 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 781 predicate places. [2023-09-01 15:07:14,184 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1820 transitions, 54803 flow [2023-09-01 15:07:14,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:14,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:07:14,184 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:07:14,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-09-01 15:07:14,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:14,385 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:07:14,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:07:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1659375279, now seen corresponding path program 17 times [2023-09-01 15:07:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:07:14,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606436577] [2023-09-01 15:07:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:07:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:07:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:07:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606436577] [2023-09-01 15:07:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606436577] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:07:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610329433] [2023-09-01 15:07:14,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:07:14,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:07:14,565 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:07:14,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 15:07:14,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 15:07:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:07:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:07:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:07:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:14,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:07:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:15,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610329433] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:07:15,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:07:15,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-09-01 15:07:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020424070] [2023-09-01 15:07:15,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:07:15,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 15:07:15,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:07:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 15:07:15,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-09-01 15:07:15,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:07:15,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1820 transitions, 54803 flow. Second operand has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:15,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:07:15,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:07:15,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:07:25,263 INFO L130 PetriNetUnfolder]: 5927/11474 cut-off events. [2023-09-01 15:07:25,263 INFO L131 PetriNetUnfolder]: For 439158/439158 co-relation queries the response was YES. [2023-09-01 15:07:25,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131665 conditions, 11474 events. 5927/11474 cut-off events. For 439158/439158 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 99052 event pairs, 1703 based on Foata normal form. 48/11521 useless extension candidates. Maximal degree in co-relation 131098. Up to 9159 conditions per place. [2023-09-01 15:07:25,503 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1418 selfloop transitions, 555 changer transitions 0/1973 dead transitions. [2023-09-01 15:07:25,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1973 transitions, 61142 flow [2023-09-01 15:07:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 15:07:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 15:07:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4109 transitions. [2023-09-01 15:07:25,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083275365199245 [2023-09-01 15:07:25,506 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4109 transitions. [2023-09-01 15:07:25,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4109 transitions. [2023-09-01 15:07:25,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:07:25,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4109 transitions. [2023-09-01 15:07:25,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 141.68965517241378) internal successors, (4109), 29 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:25,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:25,513 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:25,513 INFO L175 Difference]: Start difference. First operand has 802 places, 1820 transitions, 54803 flow. Second operand 29 states and 4109 transitions. [2023-09-01 15:07:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1973 transitions, 61142 flow [2023-09-01 15:07:31,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 1973 transitions, 60357 flow, removed 69 selfloop flow, removed 15 redundant places. [2023-09-01 15:07:31,683 INFO L231 Difference]: Finished difference. Result has 821 places, 1861 transitions, 56862 flow [2023-09-01 15:07:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53827, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=56862, PETRI_PLACES=821, PETRI_TRANSITIONS=1861} [2023-09-01 15:07:31,684 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 800 predicate places. [2023-09-01 15:07:31,684 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1861 transitions, 56862 flow [2023-09-01 15:07:31,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:31,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:07:31,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:07:31,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 15:07:31,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-09-01 15:07:31,886 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:07:31,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:07:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1701277171, now seen corresponding path program 18 times [2023-09-01 15:07:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:07:31,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123040718] [2023-09-01 15:07:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:07:31,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:07:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:07:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123040718] [2023-09-01 15:07:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123040718] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:07:32,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192994502] [2023-09-01 15:07:32,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:07:32,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:07:32,031 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:07:32,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 15:07:32,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:07:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:07:32,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:07:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:07:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:07:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192994502] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:07:32,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:07:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-09-01 15:07:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511025254] [2023-09-01 15:07:32,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:07:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 15:07:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:07:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 15:07:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-09-01 15:07:32,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:07:32,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1861 transitions, 56862 flow. Second operand has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:32,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:07:32,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:07:32,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:07:42,127 INFO L130 PetriNetUnfolder]: 6280/12112 cut-off events. [2023-09-01 15:07:42,127 INFO L131 PetriNetUnfolder]: For 487959/487959 co-relation queries the response was YES. [2023-09-01 15:07:42,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140733 conditions, 12112 events. 6280/12112 cut-off events. For 487959/487959 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 105082 event pairs, 497 based on Foata normal form. 48/12159 useless extension candidates. Maximal degree in co-relation 140290. Up to 5388 conditions per place. [2023-09-01 15:07:42,367 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 897 selfloop transitions, 1240 changer transitions 0/2137 dead transitions. [2023-09-01 15:07:42,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2137 transitions, 66690 flow [2023-09-01 15:07:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 15:07:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 15:07:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5254 transitions. [2023-09-01 15:07:42,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092219020172911 [2023-09-01 15:07:42,371 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5254 transitions. [2023-09-01 15:07:42,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5254 transitions. [2023-09-01 15:07:42,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:07:42,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5254 transitions. [2023-09-01 15:07:42,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 142.0) internal successors, (5254), 37 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:42,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:42,379 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:42,379 INFO L175 Difference]: Start difference. First operand has 821 places, 1861 transitions, 56862 flow. Second operand 37 states and 5254 transitions. [2023-09-01 15:07:42,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2137 transitions, 66690 flow [2023-09-01 15:07:48,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 2137 transitions, 65804 flow, removed 119 selfloop flow, removed 15 redundant places. [2023-09-01 15:07:49,013 INFO L231 Difference]: Finished difference. Result has 851 places, 1988 transitions, 64270 flow [2023-09-01 15:07:49,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=55791, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=64270, PETRI_PLACES=851, PETRI_TRANSITIONS=1988} [2023-09-01 15:07:49,015 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 830 predicate places. [2023-09-01 15:07:49,015 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 1988 transitions, 64270 flow [2023-09-01 15:07:49,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:49,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:07:49,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:07:49,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 15:07:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 15:07:49,224 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:07:49,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:07:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 202869541, now seen corresponding path program 25 times [2023-09-01 15:07:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:07:49,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351423425] [2023-09-01 15:07:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:07:49,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:07:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:07:49,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:07:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351423425] [2023-09-01 15:07:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351423425] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:07:49,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027824003] [2023-09-01 15:07:49,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:07:49,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:07:49,914 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:07:49,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 15:07:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 15:07:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:07:50,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:07:50,354 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:07:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:07:50,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:07:50,925 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:07:50,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:07:51,053 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:07:51,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:07:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027824003] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:07:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:07:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2023-09-01 15:07:51,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858384906] [2023-09-01 15:07:51,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:07:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 15:07:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:07:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 15:07:51,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-09-01 15:07:53,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 347 [2023-09-01 15:07:53,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 1988 transitions, 64270 flow. Second operand has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:53,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:07:53,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 347 [2023-09-01 15:07:53,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:08:04,235 INFO L130 PetriNetUnfolder]: 6335/12214 cut-off events. [2023-09-01 15:08:04,235 INFO L131 PetriNetUnfolder]: For 540667/540667 co-relation queries the response was YES. [2023-09-01 15:08:04,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148987 conditions, 12214 events. 6335/12214 cut-off events. For 540667/540667 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 105927 event pairs, 843 based on Foata normal form. 5/12218 useless extension candidates. Maximal degree in co-relation 148396. Up to 11770 conditions per place. [2023-09-01 15:08:04,599 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1930 selfloop transitions, 144 changer transitions 11/2085 dead transitions. [2023-09-01 15:08:04,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 2085 transitions, 69627 flow [2023-09-01 15:08:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 15:08:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 15:08:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3799 transitions. [2023-09-01 15:08:04,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531653806823464 [2023-09-01 15:08:04,603 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3799 transitions. [2023-09-01 15:08:04,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3799 transitions. [2023-09-01 15:08:04,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:08:04,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3799 transitions. [2023-09-01 15:08:04,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 122.54838709677419) internal successors, (3799), 31 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:04,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:04,613 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:04,613 INFO L175 Difference]: Start difference. First operand has 851 places, 1988 transitions, 64270 flow. Second operand 31 states and 3799 transitions. [2023-09-01 15:08:04,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 2085 transitions, 69627 flow [2023-09-01 15:08:12,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 2085 transitions, 68584 flow, removed 191 selfloop flow, removed 19 redundant places. [2023-09-01 15:08:12,698 INFO L231 Difference]: Finished difference. Result has 872 places, 2008 transitions, 64312 flow [2023-09-01 15:08:12,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63236, PETRI_DIFFERENCE_MINUEND_PLACES=832, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=64312, PETRI_PLACES=872, PETRI_TRANSITIONS=2008} [2023-09-01 15:08:12,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-09-01 15:08:12,700 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2008 transitions, 64312 flow [2023-09-01 15:08:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:12,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:08:12,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:08:12,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-09-01 15:08:12,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-09-01 15:08:12,901 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:08:12,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:08:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash -542954565, now seen corresponding path program 19 times [2023-09-01 15:08:12,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:08:12,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090297808] [2023-09-01 15:08:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:08:12,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:08:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:08:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:08:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090297808] [2023-09-01 15:08:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090297808] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:08:13,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609434440] [2023-09-01 15:08:13,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:08:13,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:08:13,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:08:13,037 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:08:13,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 15:08:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:08:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 15:08:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:08:13,394 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 102 [2023-09-01 15:08:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:13,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:08:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609434440] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:08:13,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:08:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-09-01 15:08:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059011203] [2023-09-01 15:08:13,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:08:13,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 15:08:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:08:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 15:08:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-09-01 15:08:13,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-09-01 15:08:13,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2008 transitions, 64312 flow. Second operand has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:13,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:08:13,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-09-01 15:08:13,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:08:23,420 INFO L130 PetriNetUnfolder]: 6325/12149 cut-off events. [2023-09-01 15:08:23,421 INFO L131 PetriNetUnfolder]: For 559870/559870 co-relation queries the response was YES. [2023-09-01 15:08:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147987 conditions, 12149 events. 6325/12149 cut-off events. For 559870/559870 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105218 event pairs, 494 based on Foata normal form. 12/12160 useless extension candidates. Maximal degree in co-relation 147389. Up to 5407 conditions per place. [2023-09-01 15:08:23,674 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 899 selfloop transitions, 1226 changer transitions 0/2125 dead transitions. [2023-09-01 15:08:23,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2125 transitions, 70310 flow [2023-09-01 15:08:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:08:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:08:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3295 transitions. [2023-09-01 15:08:23,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41285553188823454 [2023-09-01 15:08:23,677 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3295 transitions. [2023-09-01 15:08:23,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3295 transitions. [2023-09-01 15:08:23,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:08:23,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3295 transitions. [2023-09-01 15:08:23,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.2608695652174) internal successors, (3295), 23 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:23,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:23,682 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:23,682 INFO L175 Difference]: Start difference. First operand has 872 places, 2008 transitions, 64312 flow. Second operand 23 states and 3295 transitions. [2023-09-01 15:08:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 2125 transitions, 70310 flow [2023-09-01 15:08:31,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 2125 transitions, 69887 flow, removed 128 selfloop flow, removed 22 redundant places. [2023-09-01 15:08:31,176 INFO L231 Difference]: Finished difference. Result has 872 places, 2012 transitions, 66997 flow [2023-09-01 15:08:31,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63797, PETRI_DIFFERENCE_MINUEND_PLACES=848, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=66997, PETRI_PLACES=872, PETRI_TRANSITIONS=2012} [2023-09-01 15:08:31,177 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-09-01 15:08:31,178 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2012 transitions, 66997 flow [2023-09-01 15:08:31,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:31,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:08:31,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:08:31,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 15:08:31,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-09-01 15:08:31,378 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:08:31,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:08:31,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1368375569, now seen corresponding path program 26 times [2023-09-01 15:08:31,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:08:31,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145710746] [2023-09-01 15:08:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:08:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:08:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:08:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:08:32,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:08:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145710746] [2023-09-01 15:08:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145710746] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:08:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699600061] [2023-09-01 15:08:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:08:32,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:08:32,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:08:32,531 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:08:32,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 15:08:32,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:08:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:08:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 15:08:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:08:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:08:32,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-09-01 15:08:33,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:08:33,041 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:08:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:08:33,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:08:33,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:08:33,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-09-01 15:08:33,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:08:33,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-09-01 15:08:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:08:33,833 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:08:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:08:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699600061] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:08:33,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:08:33,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2023-09-01 15:08:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918445599] [2023-09-01 15:08:33,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:08:33,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 15:08:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:08:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 15:08:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2023-09-01 15:08:37,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:08:37,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2012 transitions, 66997 flow. Second operand has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:37,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:08:37,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:08:37,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:08:50,566 INFO L130 PetriNetUnfolder]: 6373/12242 cut-off events. [2023-09-01 15:08:50,566 INFO L131 PetriNetUnfolder]: For 584638/584638 co-relation queries the response was YES. [2023-09-01 15:08:50,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154050 conditions, 12242 events. 6373/12242 cut-off events. For 584638/584638 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105831 event pairs, 609 based on Foata normal form. 5/12246 useless extension candidates. Maximal degree in co-relation 153448. Up to 10994 conditions per place. [2023-09-01 15:08:50,832 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1749 selfloop transitions, 371 changer transitions 13/2133 dead transitions. [2023-09-01 15:08:50,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 2133 transitions, 72600 flow [2023-09-01 15:08:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 15:08:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 15:08:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3365 transitions. [2023-09-01 15:08:50,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.262092063244801 [2023-09-01 15:08:50,835 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3365 transitions. [2023-09-01 15:08:50,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3365 transitions. [2023-09-01 15:08:50,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:08:50,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3365 transitions. [2023-09-01 15:08:50,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.94594594594595) internal successors, (3365), 37 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:50,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:50,842 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:50,842 INFO L175 Difference]: Start difference. First operand has 872 places, 2012 transitions, 66997 flow. Second operand 37 states and 3365 transitions. [2023-09-01 15:08:50,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 2133 transitions, 72600 flow [2023-09-01 15:08:59,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 2133 transitions, 71890 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-09-01 15:08:59,702 INFO L231 Difference]: Finished difference. Result has 901 places, 2025 transitions, 67617 flow [2023-09-01 15:08:59,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66299, PETRI_DIFFERENCE_MINUEND_PLACES=859, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=67617, PETRI_PLACES=901, PETRI_TRANSITIONS=2025} [2023-09-01 15:08:59,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 880 predicate places. [2023-09-01 15:08:59,705 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 2025 transitions, 67617 flow [2023-09-01 15:08:59,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:59,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:08:59,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:08:59,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-09-01 15:08:59,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 15:08:59,913 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:08:59,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:08:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1059376025, now seen corresponding path program 27 times [2023-09-01 15:08:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:08:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806293918] [2023-09-01 15:08:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:08:59,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:08:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:09:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:09:00,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:09:00,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806293918] [2023-09-01 15:09:00,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806293918] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:09:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781329596] [2023-09-01 15:09:00,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:09:00,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:09:00,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:09:00,784 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:09:00,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 15:09:00,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:09:00,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:09:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 15:09:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:09:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:09:01,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-09-01 15:09:01,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:01,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:09:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:09:01,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:09:02,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:02,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-09-01 15:09:02,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:02,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-09-01 15:09:02,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:09:02,345 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:09:02,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:09:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:02,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781329596] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:09:02,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:09:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-09-01 15:09:02,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160618388] [2023-09-01 15:09:02,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:09:02,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:09:02,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:09:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:09:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=920, Unknown=1, NotChecked=0, Total=1056 [2023-09-01 15:09:04,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 347 [2023-09-01 15:09:04,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 2025 transitions, 67617 flow. Second operand has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:04,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:09:04,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 347 [2023-09-01 15:09:04,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:09:18,165 INFO L130 PetriNetUnfolder]: 6362/12213 cut-off events. [2023-09-01 15:09:18,165 INFO L131 PetriNetUnfolder]: For 598358/598358 co-relation queries the response was YES. [2023-09-01 15:09:18,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154734 conditions, 12213 events. 6362/12213 cut-off events. For 598358/598358 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 105465 event pairs, 617 based on Foata normal form. 6/12218 useless extension candidates. Maximal degree in co-relation 154120. Up to 10960 conditions per place. [2023-09-01 15:09:18,447 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1744 selfloop transitions, 360 changer transitions 15/2119 dead transitions. [2023-09-01 15:09:18,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2119 transitions, 72797 flow [2023-09-01 15:09:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 15:09:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 15:09:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3089 transitions. [2023-09-01 15:09:18,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697580997292813 [2023-09-01 15:09:18,450 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3089 transitions. [2023-09-01 15:09:18,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3089 transitions. [2023-09-01 15:09:18,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:09:18,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3089 transitions. [2023-09-01 15:09:18,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 93.60606060606061) internal successors, (3089), 33 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:18,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:18,457 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:18,457 INFO L175 Difference]: Start difference. First operand has 901 places, 2025 transitions, 67617 flow. Second operand 33 states and 3089 transitions. [2023-09-01 15:09:18,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2119 transitions, 72797 flow [2023-09-01 15:09:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 2119 transitions, 72051 flow, removed 101 selfloop flow, removed 34 redundant places. [2023-09-01 15:09:27,387 INFO L231 Difference]: Finished difference. Result has 904 places, 2034 transitions, 68035 flow [2023-09-01 15:09:27,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66806, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=68035, PETRI_PLACES=904, PETRI_TRANSITIONS=2034} [2023-09-01 15:09:27,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 883 predicate places. [2023-09-01 15:09:27,389 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2034 transitions, 68035 flow [2023-09-01 15:09:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:27,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:09:27,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:09:27,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-09-01 15:09:27,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-09-01 15:09:27,590 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:09:27,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:09:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1095038279, now seen corresponding path program 28 times [2023-09-01 15:09:27,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:09:27,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975254457] [2023-09-01 15:09:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:09:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:09:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:09:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:09:28,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:09:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975254457] [2023-09-01 15:09:28,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975254457] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:09:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055175665] [2023-09-01 15:09:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:09:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:09:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:09:28,725 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:09:28,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 15:09:28,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:09:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:09:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 15:09:28,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:09:29,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:09:29,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 15:09:29,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:29,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:09:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:09:29,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:09:30,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:30,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-09-01 15:09:30,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:30,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-09-01 15:09:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:09:30,242 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:09:30,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:09:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055175665] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:09:30,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:09:30,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-09-01 15:09:30,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270622056] [2023-09-01 15:09:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:09:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:09:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:09:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:09:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=920, Unknown=2, NotChecked=0, Total=1056 [2023-09-01 15:09:31,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:09:31,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2034 transitions, 68035 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:31,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:09:31,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:09:31,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:09:42,306 INFO L130 PetriNetUnfolder]: 6416/12293 cut-off events. [2023-09-01 15:09:42,306 INFO L131 PetriNetUnfolder]: For 589171/589171 co-relation queries the response was YES. [2023-09-01 15:09:42,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155457 conditions, 12293 events. 6416/12293 cut-off events. For 589171/589171 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 105718 event pairs, 799 based on Foata normal form. 6/12298 useless extension candidates. Maximal degree in co-relation 154847. Up to 11706 conditions per place. [2023-09-01 15:09:42,587 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1911 selfloop transitions, 206 changer transitions 11/2128 dead transitions. [2023-09-01 15:09:42,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2128 transitions, 73750 flow [2023-09-01 15:09:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 15:09:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 15:09:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2023-09-01 15:09:42,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25919647397864043 [2023-09-01 15:09:42,589 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2023-09-01 15:09:42,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2023-09-01 15:09:42,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:09:42,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2023-09-01 15:09:42,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:42,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:42,596 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:42,597 INFO L175 Difference]: Start difference. First operand has 904 places, 2034 transitions, 68035 flow. Second operand 34 states and 3058 transitions. [2023-09-01 15:09:42,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2128 transitions, 73750 flow [2023-09-01 15:09:51,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 906 places, 2128 transitions, 73191 flow, removed 61 selfloop flow, removed 27 redundant places. [2023-09-01 15:09:51,285 INFO L231 Difference]: Finished difference. Result has 915 places, 2060 transitions, 69099 flow [2023-09-01 15:09:51,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=67454, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=69099, PETRI_PLACES=915, PETRI_TRANSITIONS=2060} [2023-09-01 15:09:51,287 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 894 predicate places. [2023-09-01 15:09:51,287 INFO L495 AbstractCegarLoop]: Abstraction has has 915 places, 2060 transitions, 69099 flow [2023-09-01 15:09:51,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:51,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:09:51,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:09:51,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-09-01 15:09:51,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:09:51,494 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:09:51,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:09:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1094443633, now seen corresponding path program 29 times [2023-09-01 15:09:51,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:09:51,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273193345] [2023-09-01 15:09:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:09:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:09:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:09:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:09:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:09:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273193345] [2023-09-01 15:09:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273193345] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:09:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204970636] [2023-09-01 15:09:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:09:52,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:09:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:09:52,473 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:09:52,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 15:09:52,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 15:09:52,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:09:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 15:09:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:09:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:09:52,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 15:09:53,223 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-09-01 15:09:53,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 188 [2023-09-01 15:09:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:09:55,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:09:55,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:55,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-09-01 15:09:55,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:09:55,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-09-01 15:09:55,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:09:56,032 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-09-01 15:09:56,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-09-01 15:09:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204970636] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:09:56,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:09:56,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-09-01 15:09:56,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003220316] [2023-09-01 15:09:56,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:09:56,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:09:56,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:09:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:09:56,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=939, Unknown=1, NotChecked=0, Total=1056 [2023-09-01 15:09:59,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:09:59,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 915 places, 2060 transitions, 69099 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:59,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:09:59,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:09:59,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:10,540 INFO L130 PetriNetUnfolder]: 6414/12280 cut-off events. [2023-09-01 15:10:10,541 INFO L131 PetriNetUnfolder]: For 589995/589995 co-relation queries the response was YES. [2023-09-01 15:10:10,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155840 conditions, 12280 events. 6414/12280 cut-off events. For 589995/589995 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 105344 event pairs, 805 based on Foata normal form. 1/12280 useless extension candidates. Maximal degree in co-relation 155225. Up to 11803 conditions per place. [2023-09-01 15:10:10,813 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1901 selfloop transitions, 199 changer transitions 6/2106 dead transitions. [2023-09-01 15:10:10,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 2106 transitions, 73589 flow [2023-09-01 15:10:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 15:10:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 15:10:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2774 transitions. [2023-09-01 15:10:10,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25787859068513524 [2023-09-01 15:10:10,815 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2774 transitions. [2023-09-01 15:10:10,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2774 transitions. [2023-09-01 15:10:10,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:10,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2774 transitions. [2023-09-01 15:10:10,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.48387096774194) internal successors, (2774), 31 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,822 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:10,822 INFO L175 Difference]: Start difference. First operand has 915 places, 2060 transitions, 69099 flow. Second operand 31 states and 2774 transitions. [2023-09-01 15:10:10,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 2106 transitions, 73589 flow [2023-09-01 15:10:19,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 2106 transitions, 73149 flow, removed 121 selfloop flow, removed 24 redundant places. [2023-09-01 15:10:19,528 INFO L231 Difference]: Finished difference. Result has 922 places, 2062 transitions, 69164 flow [2023-09-01 15:10:19,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68659, PETRI_DIFFERENCE_MINUEND_PLACES=889, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69164, PETRI_PLACES=922, PETRI_TRANSITIONS=2062} [2023-09-01 15:10:19,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 901 predicate places. [2023-09-01 15:10:19,530 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 2062 transitions, 69164 flow [2023-09-01 15:10:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:19,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:19,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:19,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:19,737 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:19,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash -788944561, now seen corresponding path program 30 times [2023-09-01 15:10:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:19,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099780681] [2023-09-01 15:10:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099780681] [2023-09-01 15:10:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099780681] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669743330] [2023-09-01 15:10:20,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:10:20,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:20,567 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:20,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 15:10:20,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 15:10:20,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 15:10:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:10:20,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 15:10:21,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:21,019 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-09-01 15:10:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:10:21,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:21,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:21,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 195 [2023-09-01 15:10:21,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:21,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2023-09-01 15:10:22,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-09-01 15:10:22,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:22,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-09-01 15:10:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:10:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669743330] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:22,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:22,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-09-01 15:10:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494138967] [2023-09-01 15:10:22,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:22,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 15:10:22,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 15:10:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=931, Unknown=1, NotChecked=0, Total=1056 [2023-09-01 15:10:25,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:10:25,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 2062 transitions, 69164 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:25,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:25,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:10:25,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:37,124 INFO L130 PetriNetUnfolder]: 6414/12285 cut-off events. [2023-09-01 15:10:37,124 INFO L131 PetriNetUnfolder]: For 584533/584533 co-relation queries the response was YES. [2023-09-01 15:10:37,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155688 conditions, 12285 events. 6414/12285 cut-off events. For 584533/584533 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 105605 event pairs, 832 based on Foata normal form. 4/12288 useless extension candidates. Maximal degree in co-relation 155070. Up to 11696 conditions per place. [2023-09-01 15:10:37,413 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1905 selfloop transitions, 218 changer transitions 13/2136 dead transitions. [2023-09-01 15:10:37,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 955 places, 2136 transitions, 73896 flow [2023-09-01 15:10:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 15:10:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 15:10:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3152 transitions. [2023-09-01 15:10:37,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25953067105804856 [2023-09-01 15:10:37,417 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3152 transitions. [2023-09-01 15:10:37,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3152 transitions. [2023-09-01 15:10:37,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:37,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3152 transitions. [2023-09-01 15:10:37,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.05714285714286) internal successors, (3152), 35 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:37,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:37,425 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:37,425 INFO L175 Difference]: Start difference. First operand has 922 places, 2062 transitions, 69164 flow. Second operand 35 states and 3152 transitions. [2023-09-01 15:10:37,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 955 places, 2136 transitions, 73896 flow [2023-09-01 15:10:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 2136 transitions, 73533 flow, removed 24 selfloop flow, removed 26 redundant places. [2023-09-01 15:10:46,139 INFO L231 Difference]: Finished difference. Result has 932 places, 2060 transitions, 69239 flow [2023-09-01 15:10:46,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68801, PETRI_DIFFERENCE_MINUEND_PLACES=895, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=69239, PETRI_PLACES=932, PETRI_TRANSITIONS=2060} [2023-09-01 15:10:46,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2023-09-01 15:10:46,140 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 2060 transitions, 69239 flow [2023-09-01 15:10:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:46,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:46,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:46,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:46,341 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:46,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1095631957, now seen corresponding path program 31 times [2023-09-01 15:10:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:46,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778628271] [2023-09-01 15:10:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:47,500 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 15:10:47,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778628271] [2023-09-01 15:10:47,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778628271] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:47,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356443702] [2023-09-01 15:10:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:10:47,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:47,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:47,502 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:10:47,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 15:10:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 15:10:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:47,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 15:10:47,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:10:47,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 15:10:48,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:48,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-09-01 15:10:48,141 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 15:10:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:48,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:10:48,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 224 [2023-09-01 15:10:49,198 INFO L321 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-09-01 15:10:49,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 570 treesize of output 637 [2023-09-01 15:10:49,408 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-09-01 15:10:49,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 458 treesize of output 466 [2023-09-01 15:10:49,614 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-09-01 15:10:49,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 185 treesize of output 277 [2023-09-01 15:10:55,601 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 15:10:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356443702] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:55,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:55,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-09-01 15:10:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137762912] [2023-09-01 15:10:55,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:55,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 15:10:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 15:10:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1054, Unknown=2, NotChecked=0, Total=1260 [2023-09-01 15:10:59,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-09-01 15:10:59,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 2060 transitions, 69239 flow. Second operand has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:59,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:59,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-09-01 15:10:59,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:24,387 INFO L130 PetriNetUnfolder]: 7174/13644 cut-off events. [2023-09-01 15:11:24,387 INFO L131 PetriNetUnfolder]: For 668333/668333 co-relation queries the response was YES. [2023-09-01 15:11:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174908 conditions, 13644 events. 7174/13644 cut-off events. For 668333/668333 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 118634 event pairs, 141 based on Foata normal form. 5/13648 useless extension candidates. Maximal degree in co-relation 174290. Up to 9243 conditions per place. [2023-09-01 15:11:24,699 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1607 selfloop transitions, 922 changer transitions 23/2552 dead transitions. [2023-09-01 15:11:24,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1008 places, 2552 transitions, 85873 flow [2023-09-01 15:11:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-09-01 15:11:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-09-01 15:11:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7117 transitions. [2023-09-01 15:11:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25962134753584065 [2023-09-01 15:11:24,704 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7117 transitions. [2023-09-01 15:11:24,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7117 transitions. [2023-09-01 15:11:24,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:24,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7117 transitions. [2023-09-01 15:11:24,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 90.0886075949367) internal successors, (7117), 79 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:24,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 347.0) internal successors, (27760), 80 states have internal predecessors, (27760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:24,811 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 347.0) internal successors, (27760), 80 states have internal predecessors, (27760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:24,811 INFO L175 Difference]: Start difference. First operand has 932 places, 2060 transitions, 69239 flow. Second operand 79 states and 7117 transitions. [2023-09-01 15:11:24,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1008 places, 2552 transitions, 85873 flow [2023-09-01 15:11:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 976 places, 2552 transitions, 85359 flow, removed 28 selfloop flow, removed 32 redundant places. [2023-09-01 15:11:34,624 INFO L231 Difference]: Finished difference. Result has 1005 places, 2348 transitions, 82062 flow [2023-09-01 15:11:34,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68787, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=82062, PETRI_PLACES=1005, PETRI_TRANSITIONS=2348} [2023-09-01 15:11:34,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 984 predicate places. [2023-09-01 15:11:34,626 INFO L495 AbstractCegarLoop]: Abstraction has has 1005 places, 2348 transitions, 82062 flow [2023-09-01 15:11:34,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:34,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:11:34,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:11:34,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-09-01 15:11:34,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:34,833 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:11:34,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:11:34,833 INFO L85 PathProgramCache]: Analyzing trace with hash -699103046, now seen corresponding path program 32 times [2023-09-01 15:11:34,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:11:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639465685] [2023-09-01 15:11:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:11:34,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:11:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:11:35,951 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 15:11:35,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:11:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639465685] [2023-09-01 15:11:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639465685] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:11:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154524621] [2023-09-01 15:11:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:11:35,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:11:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:11:35,952 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:11:35,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 15:11:36,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:11:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:11:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 15:11:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:11:36,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:11:36,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-09-01 15:11:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:11:36,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:11:37,043 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-09-01 15:11:37,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-09-01 15:11:37,159 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-09-01 15:11:37,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-09-01 15:11:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 15:11:37,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154524621] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:11:37,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:11:37,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 29 [2023-09-01 15:11:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803784118] [2023-09-01 15:11:37,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:11:37,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 15:11:37,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:11:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 15:11:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-09-01 15:11:41,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-09-01 15:11:41,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 2348 transitions, 82062 flow. Second operand has 31 states, 31 states have (on average 115.61290322580645) internal successors, (3584), 31 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:41,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:11:41,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-09-01 15:11:41,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:11:53,969 INFO L130 PetriNetUnfolder]: 7310/13865 cut-off events. [2023-09-01 15:11:53,969 INFO L131 PetriNetUnfolder]: For 771982/771982 co-relation queries the response was YES. [2023-09-01 15:11:54,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186728 conditions, 13865 events. 7310/13865 cut-off events. For 771982/771982 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 120192 event pairs, 1007 based on Foata normal form. 10/13873 useless extension candidates. Maximal degree in co-relation 186384. Up to 13317 conditions per place. [2023-09-01 15:11:54,293 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 2293 selfloop transitions, 202 changer transitions 13/2508 dead transitions. [2023-09-01 15:11:54,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1034 places, 2508 transitions, 90450 flow [2023-09-01 15:11:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 15:11:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 15:11:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4067 transitions. [2023-09-01 15:11:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34471944397355486 [2023-09-01 15:11:54,296 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4067 transitions. [2023-09-01 15:11:54,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4067 transitions. [2023-09-01 15:11:54,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:11:54,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4067 transitions. [2023-09-01 15:11:54,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 119.61764705882354) internal successors, (4067), 34 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:54,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:54,303 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:11:54,303 INFO L175 Difference]: Start difference. First operand has 1005 places, 2348 transitions, 82062 flow. Second operand 34 states and 4067 transitions. [2023-09-01 15:11:54,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1034 places, 2508 transitions, 90450 flow Killed by 15