./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:47:33,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:47:33,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:47:33,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:47:33,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:47:33,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:47:33,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:47:33,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:47:33,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:47:33,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:47:33,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:47:33,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:47:33,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:47:33,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:47:33,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:47:33,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:47:33,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:47:33,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:47:33,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:47:33,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:47:33,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:47:33,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:47:33,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:47:33,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:47:33,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:47:33,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:47:33,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:47:33,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:47:33,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:47:33,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:47:33,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:47:33,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:47:33,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:47:33,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:47:33,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:47:33,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:47:33,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:47:33,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:47:33,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:47:33,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:47:33,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:47:33,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:47:33,850 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:47:33,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:47:33,851 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:47:33,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:47:33,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:47:33,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:47:33,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:47:33,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:47:33,854 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:47:33,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:47:33,855 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:47:33,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:47:33,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:47:33,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:47:33,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:47:33,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:47:33,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:47:33,856 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:47:33,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:47:33,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:47:33,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:47:33,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:47:33,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:47:33,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:47:33,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:47:33,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:47:33,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:47:33,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:47:33,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:47:33,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:47:33,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:47:33,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:47:33,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:47:33,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:47:33,859 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:47:33,860 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b68e155d55184c39a54e11a2c420443b840324481c8995060134516395f2d120 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:47:34,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:47:34,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:47:34,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:47:34,200 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:47:34,200 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:47:34,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 11:47:35,325 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:47:35,475 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:47:35,476 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2023-09-01 11:47:35,482 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8663c12ba/82c08b42171b45d88795276d5b2a999e/FLAGb30a2bb27 [2023-09-01 11:47:35,492 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8663c12ba/82c08b42171b45d88795276d5b2a999e [2023-09-01 11:47:35,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:47:35,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:47:35,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:47:35,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:47:35,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:47:35,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377e4952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35, skipping insertion in model container [2023-09-01 11:47:35,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:47:35,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:47:35,676 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 11:47:35,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:47:35,691 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:47:35,711 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/chl-chromosome-subst.wvr.c[3097,3110] [2023-09-01 11:47:35,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:47:35,727 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:47:35,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35 WrapperNode [2023-09-01 11:47:35,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:47:35,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:47:35,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:47:35,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:47:35,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,785 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 281 [2023-09-01 11:47:35,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:47:35,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:47:35,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:47:35,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:47:35,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,821 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:47:35,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:47:35,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:47:35,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:47:35,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (1/1) ... [2023-09-01 11:47:35,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:47:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:35,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:47:35,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:47:35,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:47:35,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:47:35,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:47:35,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:47:35,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:47:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:47:35,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:47:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:47:35,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 11:47:35,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 11:47:35,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:47:35,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:47:35,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:47:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:47:35,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:47:35,909 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:47:36,049 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:47:36,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:47:36,521 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:47:36,543 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:47:36,543 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 11:47:36,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:47:36 BoogieIcfgContainer [2023-09-01 11:47:36,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:47:36,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:47:36,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:47:36,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:47:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:47:35" (1/3) ... [2023-09-01 11:47:36,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e11032b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:47:36, skipping insertion in model container [2023-09-01 11:47:36,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:47:35" (2/3) ... [2023-09-01 11:47:36,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e11032b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:47:36, skipping insertion in model container [2023-09-01 11:47:36,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:47:36" (3/3) ... [2023-09-01 11:47:36,556 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2023-09-01 11:47:36,562 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:47:36,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:47:36,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:47:36,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:47:36,696 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:47:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 324 transitions, 672 flow [2023-09-01 11:47:36,893 INFO L130 PetriNetUnfolder]: 29/321 cut-off events. [2023-09-01 11:47:36,894 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:47:36,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 321 events. 29/321 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 494 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-09-01 11:47:36,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 324 transitions, 672 flow [2023-09-01 11:47:36,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 311 transitions, 640 flow [2023-09-01 11:47:36,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:47:36,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 311 transitions, 640 flow [2023-09-01 11:47:36,926 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 311 transitions, 640 flow [2023-09-01 11:47:36,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 311 transitions, 640 flow [2023-09-01 11:47:36,993 INFO L130 PetriNetUnfolder]: 29/311 cut-off events. [2023-09-01 11:47:36,994 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:47:36,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 311 events. 29/311 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 493 event pairs, 0 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-09-01 11:47:37,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-09-01 11:47:44,771 INFO L134 LiptonReduction]: Checked pairs total: 14156 [2023-09-01 11:47:44,773 INFO L136 LiptonReduction]: Total number of compositions: 352 [2023-09-01 11:47:44,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:47:44,798 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;@7d427187, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:47:44,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 11:47:44,804 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-09-01 11:47:44,805 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:47:44,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:44,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:44,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:44,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -266383442, now seen corresponding path program 1 times [2023-09-01 11:47:44,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765395158] [2023-09-01 11:47:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:47:45,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:45,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765395158] [2023-09-01 11:47:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765395158] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:47:45,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554208694] [2023-09-01 11:47:45,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:47:45,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:47:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:47:45,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-09-01 11:47:45,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:45,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-09-01 11:47:45,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:45,593 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-09-01 11:47:45,594 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-09-01 11:47:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-09-01 11:47:45,597 INFO L137 encePairwiseOnDemand]: 668/676 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-09-01 11:47:45,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-09-01 11:47:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:47:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:47:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-09-01 11:47:45,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354043392504931 [2023-09-01 11:47:45,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-09-01 11:47:45,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-09-01 11:47:45,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:45,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-09-01 11:47:45,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,643 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 883 transitions. [2023-09-01 11:47:45,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-09-01 11:47:45,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 11:47:45,650 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-09-01 11:47:45,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-09-01 11:47:45,655 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-09-01 11:47:45,655 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-09-01 11:47:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:45,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:45,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:47:45,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:45,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash -820998595, now seen corresponding path program 1 times [2023-09-01 11:47:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:45,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806502668] [2023-09-01 11:47:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:45,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:47:45,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:45,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806502668] [2023-09-01 11:47:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806502668] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:45,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:47:45,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:47:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097569703] [2023-09-01 11:47:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:47:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:47:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:47:45,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 676 [2023-09-01 11:47:45,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:45,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:45,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 676 [2023-09-01 11:47:45,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:45,992 INFO L130 PetriNetUnfolder]: 658/966 cut-off events. [2023-09-01 11:47:45,993 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 11:47:45,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1985 conditions, 966 events. 658/966 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3451 event pairs, 253 based on Foata normal form. 1/754 useless extension candidates. Maximal degree in co-relation 1954. Up to 546 conditions per place. [2023-09-01 11:47:45,996 INFO L137 encePairwiseOnDemand]: 673/676 looper letters, 45 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-09-01 11:47:45,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 249 flow [2023-09-01 11:47:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:47:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:47:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 915 transitions. [2023-09-01 11:47:45,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2023-09-01 11:47:46,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 915 transitions. [2023-09-01 11:47:46,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 915 transitions. [2023-09-01 11:47:46,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:46,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 915 transitions. [2023-09-01 11:47:46,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 676.0) internal successors, (2704), 4 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,007 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 3 states and 915 transitions. [2023-09-01 11:47:46,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 249 flow [2023-09-01 11:47:46,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:46,009 INFO L231 Difference]: Finished difference. Result has 33 places, 34 transitions, 104 flow [2023-09-01 11:47:46,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2023-09-01 11:47:46,010 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-09-01 11:47:46,010 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 104 flow [2023-09-01 11:47:46,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:46,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:46,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:47:46,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:46,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1628203704, now seen corresponding path program 1 times [2023-09-01 11:47:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:46,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070341894] [2023-09-01 11:47:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:46,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:46,145 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 11:47:46,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070341894] [2023-09-01 11:47:46,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070341894] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369335475] [2023-09-01 11:47:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:46,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:46,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:46,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:46,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:47:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 11:47:46,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:46,361 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 11:47:46,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:46,408 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 11:47:46,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369335475] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:46,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:46,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-09-01 11:47:46,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976958406] [2023-09-01 11:47:46,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:46,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:47:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:46,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:47:46,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:46,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 676 [2023-09-01 11:47:46,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 104 flow. Second operand has 8 states, 8 states have (on average 280.375) internal successors, (2243), 8 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:46,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 676 [2023-09-01 11:47:46,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:46,700 INFO L130 PetriNetUnfolder]: 658/975 cut-off events. [2023-09-01 11:47:46,701 INFO L131 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2023-09-01 11:47:46,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 975 events. 658/975 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 0/760 useless extension candidates. Maximal degree in co-relation 2085. Up to 964 conditions per place. [2023-09-01 11:47:46,705 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 15 changer transitions 0/43 dead transitions. [2023-09-01 11:47:46,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 226 flow [2023-09-01 11:47:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:47:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:47:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1707 transitions. [2023-09-01 11:47:46,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208579881656805 [2023-09-01 11:47:46,711 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1707 transitions. [2023-09-01 11:47:46,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1707 transitions. [2023-09-01 11:47:46,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:46,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1707 transitions. [2023-09-01 11:47:46,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 284.5) internal successors, (1707), 6 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,724 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,724 INFO L175 Difference]: Start difference. First operand has 33 places, 34 transitions, 104 flow. Second operand 6 states and 1707 transitions. [2023-09-01 11:47:46,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 226 flow [2023-09-01 11:47:46,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:46,726 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 198 flow [2023-09-01 11:47:46,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2023-09-01 11:47:46,727 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-09-01 11:47:46,727 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 198 flow [2023-09-01 11:47:46,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 280.375) internal successors, (2243), 8 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:46,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:46,729 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:46,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:47:46,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:46,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:46,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1306613477, now seen corresponding path program 2 times [2023-09-01 11:47:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:46,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039536401] [2023-09-01 11:47:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:46,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 11:47:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039536401] [2023-09-01 11:47:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039536401] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814150228] [2023-09-01 11:47:47,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:47,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:47:47,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:47,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:47:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 11:47:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-09-01 11:47:47,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814150228] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:47:47,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:47:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-09-01 11:47:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43830584] [2023-09-01 11:47:47,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:47:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:47:47,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:47:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:47:47,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 676 [2023-09-01 11:47:47,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 198 flow. Second operand has 17 states, 17 states have (on average 278.5882352941176) internal successors, (4736), 17 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:47,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:47,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 676 [2023-09-01 11:47:47,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:48,069 INFO L130 PetriNetUnfolder]: 658/978 cut-off events. [2023-09-01 11:47:48,069 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-09-01 11:47:48,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 978 events. 658/978 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3195 event pairs, 477 based on Foata normal form. 1/765 useless extension candidates. Maximal degree in co-relation 2057. Up to 964 conditions per place. [2023-09-01 11:47:48,074 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 28 selfloop transitions, 18 changer transitions 0/46 dead transitions. [2023-09-01 11:47:48,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 308 flow [2023-09-01 11:47:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:47:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:47:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1980 transitions. [2023-09-01 11:47:48,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184277261200338 [2023-09-01 11:47:48,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1980 transitions. [2023-09-01 11:47:48,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1980 transitions. [2023-09-01 11:47:48,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:48,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1980 transitions. [2023-09-01 11:47:48,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 282.85714285714283) internal successors, (1980), 7 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 676.0) internal successors, (5408), 8 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,094 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 198 flow. Second operand 7 states and 1980 transitions. [2023-09-01 11:47:48,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 308 flow [2023-09-01 11:47:48,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 284 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 11:47:48,097 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 242 flow [2023-09-01 11:47:48,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-09-01 11:47:48,098 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-09-01 11:47:48,098 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 242 flow [2023-09-01 11:47:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 278.5882352941176) internal successors, (4736), 17 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:48,100 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:48,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:48,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 11:47:48,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:48,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:48,313 INFO L85 PathProgramCache]: Analyzing trace with hash 8528152, now seen corresponding path program 3 times [2023-09-01 11:47:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865842626] [2023-09-01 11:47:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:47:48,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865842626] [2023-09-01 11:47:48,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865842626] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128324229] [2023-09-01 11:47:48,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:48,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:48,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:48,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:47:48,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:47:48,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:47:48,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:47:49,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128324229] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:49,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619733972] [2023-09-01 11:47:49,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:49,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:47:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:47:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:47:49,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-09-01 11:47:49,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 242 flow. Second operand has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:49,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-09-01 11:47:49,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:49,415 INFO L130 PetriNetUnfolder]: 1407/2064 cut-off events. [2023-09-01 11:47:49,415 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-09-01 11:47:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 2064 events. 1407/2064 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8510 event pairs, 477 based on Foata normal form. 1/1561 useless extension candidates. Maximal degree in co-relation 4365. Up to 1015 conditions per place. [2023-09-01 11:47:49,423 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-09-01 11:47:49,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 499 flow [2023-09-01 11:47:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:47:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:47:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-09-01 11:47:49,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441198224852071 [2023-09-01 11:47:49,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-09-01 11:47:49,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-09-01 11:47:49,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:49,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-09-01 11:47:49,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,434 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,434 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 242 flow. Second operand 4 states and 1193 transitions. [2023-09-01 11:47:49,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 499 flow [2023-09-01 11:47:49,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 463 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 11:47:49,439 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 239 flow [2023-09-01 11:47:49,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-09-01 11:47:49,441 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-09-01 11:47:49,441 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 239 flow [2023-09-01 11:47:49,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:49,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:49,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:49,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:49,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:49,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2105961796, now seen corresponding path program 4 times [2023-09-01 11:47:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955393497] [2023-09-01 11:47:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:47:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955393497] [2023-09-01 11:47:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955393497] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393195596] [2023-09-01 11:47:50,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:50,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:50,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:50,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:47:50,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 11:47:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:50,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393195596] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:50,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458971789] [2023-09-01 11:47:50,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:50,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:47:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:47:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:47:50,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 676 [2023-09-01 11:47:50,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:50,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 676 [2023-09-01 11:47:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:50,710 INFO L130 PetriNetUnfolder]: 2025/2955 cut-off events. [2023-09-01 11:47:50,711 INFO L131 PetriNetUnfolder]: For 1137/1137 co-relation queries the response was YES. [2023-09-01 11:47:50,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 2955 events. 2025/2955 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12771 event pairs, 820 based on Foata normal form. 1/2516 useless extension candidates. Maximal degree in co-relation 7299. Up to 1739 conditions per place. [2023-09-01 11:47:50,724 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-09-01 11:47:50,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 509 flow [2023-09-01 11:47:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:47:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:47:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-09-01 11:47:50,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404585798816568 [2023-09-01 11:47:50,727 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-09-01 11:47:50,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-09-01 11:47:50,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:50,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-09-01 11:47:50,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 676.0) internal successors, (3380), 5 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,735 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 239 flow. Second operand 4 states and 1191 transitions. [2023-09-01 11:47:50,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 509 flow [2023-09-01 11:47:50,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 84 transitions, 509 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:47:50,739 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 288 flow [2023-09-01 11:47:50,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-09-01 11:47:50,739 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-09-01 11:47:50,740 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 288 flow [2023-09-01 11:47:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:50,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:50,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:50,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:50,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1019027948, now seen corresponding path program 1 times [2023-09-01 11:47:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:50,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946947710] [2023-09-01 11:47:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946947710] [2023-09-01 11:47:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946947710] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366180498] [2023-09-01 11:47:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:51,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:51,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:47:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:51,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366180498] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:51,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106851453] [2023-09-01 11:47:51,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:51,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-09-01 11:47:51,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:51,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:51,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-09-01 11:47:51,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:52,075 INFO L130 PetriNetUnfolder]: 2197/3199 cut-off events. [2023-09-01 11:47:52,076 INFO L131 PetriNetUnfolder]: For 2563/2563 co-relation queries the response was YES. [2023-09-01 11:47:52,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9024 conditions, 3199 events. 2197/3199 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14135 event pairs, 382 based on Foata normal form. 0/2743 useless extension candidates. Maximal degree in co-relation 8926. Up to 1217 conditions per place. [2023-09-01 11:47:52,092 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 88 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-09-01 11:47:52,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 621 flow [2023-09-01 11:47:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1497 transitions. [2023-09-01 11:47:52,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428994082840237 [2023-09-01 11:47:52,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1497 transitions. [2023-09-01 11:47:52,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1497 transitions. [2023-09-01 11:47:52,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:52,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1497 transitions. [2023-09-01 11:47:52,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.4) internal successors, (1497), 5 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,118 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,119 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 288 flow. Second operand 5 states and 1497 transitions. [2023-09-01 11:47:52,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 621 flow [2023-09-01 11:47:52,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 619 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 11:47:52,128 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 333 flow [2023-09-01 11:47:52,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-09-01 11:47:52,130 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-09-01 11:47:52,131 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 333 flow [2023-09-01 11:47:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:52,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:52,133 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:52,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:52,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:52,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:52,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash -673776660, now seen corresponding path program 2 times [2023-09-01 11:47:52,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:52,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551793677] [2023-09-01 11:47:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:52,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:52,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551793677] [2023-09-01 11:47:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551793677] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387448236] [2023-09-01 11:47:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:47:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:52,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:52,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:47:52,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:47:52,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:47:53,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387448236] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692101452] [2023-09-01 11:47:53,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:53,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:53,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 676 [2023-09-01 11:47:53,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:53,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 676 [2023-09-01 11:47:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:53,613 INFO L130 PetriNetUnfolder]: 2233/3281 cut-off events. [2023-09-01 11:47:53,613 INFO L131 PetriNetUnfolder]: For 5247/5247 co-relation queries the response was YES. [2023-09-01 11:47:53,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9962 conditions, 3281 events. 2233/3281 cut-off events. For 5247/5247 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15022 event pairs, 777 based on Foata normal form. 22/3083 useless extension candidates. Maximal degree in co-relation 9860. Up to 1558 conditions per place. [2023-09-01 11:47:53,630 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 78 selfloop transitions, 8 changer transitions 15/101 dead transitions. [2023-09-01 11:47:53,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 693 flow [2023-09-01 11:47:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1503 transitions. [2023-09-01 11:47:53,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44467455621301777 [2023-09-01 11:47:53,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1503 transitions. [2023-09-01 11:47:53,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1503 transitions. [2023-09-01 11:47:53,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:53,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1503 transitions. [2023-09-01 11:47:53,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.6) internal successors, (1503), 5 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,643 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 333 flow. Second operand 5 states and 1503 transitions. [2023-09-01 11:47:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 693 flow [2023-09-01 11:47:53,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 676 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 11:47:53,651 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 355 flow [2023-09-01 11:47:53,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-09-01 11:47:53,652 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-09-01 11:47:53,652 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 355 flow [2023-09-01 11:47:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.6) internal successors, (1458), 5 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:53,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:53,653 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:53,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:53,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:53,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1334638094, now seen corresponding path program 3 times [2023-09-01 11:47:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390148101] [2023-09-01 11:47:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:53,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390148101] [2023-09-01 11:47:54,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390148101] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932325637] [2023-09-01 11:47:54,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:47:54,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:54,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:47:54,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:47:54,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:54,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:47:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932325637] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:54,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:47:54,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-09-01 11:47:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583159094] [2023-09-01 11:47:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:47:54,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-09-01 11:47:54,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:54,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:54,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-09-01 11:47:54,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:55,189 INFO L130 PetriNetUnfolder]: 2319/3404 cut-off events. [2023-09-01 11:47:55,189 INFO L131 PetriNetUnfolder]: For 6348/6348 co-relation queries the response was YES. [2023-09-01 11:47:55,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 3404 events. 2319/3404 cut-off events. For 6348/6348 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15599 event pairs, 558 based on Foata normal form. 36/3212 useless extension candidates. Maximal degree in co-relation 10862. Up to 1211 conditions per place. [2023-09-01 11:47:55,215 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 96 selfloop transitions, 13 changer transitions 1/110 dead transitions. [2023-09-01 11:47:55,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 773 flow [2023-09-01 11:47:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1500 transitions. [2023-09-01 11:47:55,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437869822485207 [2023-09-01 11:47:55,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1500 transitions. [2023-09-01 11:47:55,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1500 transitions. [2023-09-01 11:47:55,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:55,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1500 transitions. [2023-09-01 11:47:55,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:55,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:55,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:55,228 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 355 flow. Second operand 5 states and 1500 transitions. [2023-09-01 11:47:55,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 773 flow [2023-09-01 11:47:55,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 110 transitions, 760 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 11:47:55,241 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 423 flow [2023-09-01 11:47:55,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-09-01 11:47:55,242 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-09-01 11:47:55,243 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 423 flow [2023-09-01 11:47:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:55,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:55,243 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:55,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:55,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:55,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash -991347606, now seen corresponding path program 4 times [2023-09-01 11:47:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:55,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803904397] [2023-09-01 11:47:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:55,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803904397] [2023-09-01 11:47:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803904397] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401715635] [2023-09-01 11:47:55,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:47:55,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:55,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:55,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:47:55,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:47:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:55,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401715635] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:55,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:55,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067993874] [2023-09-01 11:47:55,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:55,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:56,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-09-01 11:47:56,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:56,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-09-01 11:47:56,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:56,558 INFO L130 PetriNetUnfolder]: 2239/3277 cut-off events. [2023-09-01 11:47:56,559 INFO L131 PetriNetUnfolder]: For 7915/7915 co-relation queries the response was YES. [2023-09-01 11:47:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 3277 events. 2239/3277 cut-off events. For 7915/7915 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14785 event pairs, 749 based on Foata normal form. 22/3079 useless extension candidates. Maximal degree in co-relation 11505. Up to 1558 conditions per place. [2023-09-01 11:47:56,577 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 76 selfloop transitions, 11 changer transitions 13/100 dead transitions. [2023-09-01 11:47:56,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 743 flow [2023-09-01 11:47:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1498 transitions. [2023-09-01 11:47:56,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44319526627218936 [2023-09-01 11:47:56,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1498 transitions. [2023-09-01 11:47:56,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1498 transitions. [2023-09-01 11:47:56,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:56,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1498 transitions. [2023-09-01 11:47:56,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,589 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 423 flow. Second operand 5 states and 1498 transitions. [2023-09-01 11:47:56,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 743 flow [2023-09-01 11:47:56,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 743 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:47:56,601 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 452 flow [2023-09-01 11:47:56,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-09-01 11:47:56,602 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2023-09-01 11:47:56,602 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 452 flow [2023-09-01 11:47:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:56,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:56,603 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:56,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:56,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 11:47:56,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:56,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1221850100, now seen corresponding path program 5 times [2023-09-01 11:47:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418784189] [2023-09-01 11:47:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418784189] [2023-09-01 11:47:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418784189] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637087914] [2023-09-01 11:47:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:47:57,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:57,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:57,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:47:57,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:47:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:57,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:57,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637087914] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:57,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391984750] [2023-09-01 11:47:57,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:57,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:57,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:57,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:57,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-09-01 11:47:57,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:57,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:57,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-09-01 11:47:57,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:58,168 INFO L130 PetriNetUnfolder]: 2145/3137 cut-off events. [2023-09-01 11:47:58,168 INFO L131 PetriNetUnfolder]: For 10229/10229 co-relation queries the response was YES. [2023-09-01 11:47:58,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 3137 events. 2145/3137 cut-off events. For 10229/10229 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13883 event pairs, 922 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 11531. Up to 2061 conditions per place. [2023-09-01 11:47:58,184 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 79 selfloop transitions, 9 changer transitions 13/101 dead transitions. [2023-09-01 11:47:58,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 787 flow [2023-09-01 11:47:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:47:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:47:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1496 transitions. [2023-09-01 11:47:58,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44260355029585796 [2023-09-01 11:47:58,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1496 transitions. [2023-09-01 11:47:58,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1496 transitions. [2023-09-01 11:47:58,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:58,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1496 transitions. [2023-09-01 11:47:58,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.2) internal successors, (1496), 5 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,196 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 452 flow. Second operand 5 states and 1496 transitions. [2023-09-01 11:47:58,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 787 flow [2023-09-01 11:47:58,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 759 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 11:47:58,216 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 449 flow [2023-09-01 11:47:58,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2023-09-01 11:47:58,217 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-09-01 11:47:58,217 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 449 flow [2023-09-01 11:47:58,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:58,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:58,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:58,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:58,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:58,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1105708102, now seen corresponding path program 6 times [2023-09-01 11:47:58,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:58,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178823490] [2023-09-01 11:47:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:58,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:47:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:58,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:47:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178823490] [2023-09-01 11:47:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178823490] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:47:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281767097] [2023-09-01 11:47:58,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:47:58,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:47:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:47:58,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:47:58,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:47:58,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:47:58,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:47:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:47:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:47:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:47:58,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:47:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281767097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:47:58,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:47:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:47:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660614628] [2023-09-01 11:47:58,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:47:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:47:58,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:47:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:47:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:47:59,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-09-01 11:47:59,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:47:59,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-09-01 11:47:59,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:47:59,519 INFO L130 PetriNetUnfolder]: 2065/3000 cut-off events. [2023-09-01 11:47:59,519 INFO L131 PetriNetUnfolder]: For 9864/9864 co-relation queries the response was YES. [2023-09-01 11:47:59,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 3000 events. 2065/3000 cut-off events. For 9864/9864 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12975 event pairs, 826 based on Foata normal form. 36/2832 useless extension candidates. Maximal degree in co-relation 11190. Up to 1798 conditions per place. [2023-09-01 11:47:59,534 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 97 selfloop transitions, 12 changer transitions 1/110 dead transitions. [2023-09-01 11:47:59,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 841 flow [2023-09-01 11:47:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:47:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:47:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-09-01 11:47:59,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395956607495069 [2023-09-01 11:47:59,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-09-01 11:47:59,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-09-01 11:47:59,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:47:59,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-09-01 11:47:59,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,548 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,548 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 449 flow. Second operand 6 states and 1783 transitions. [2023-09-01 11:47:59,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 841 flow [2023-09-01 11:47:59,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 813 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 11:47:59,569 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 475 flow [2023-09-01 11:47:59,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=475, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-09-01 11:47:59,570 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-09-01 11:47:59,570 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 475 flow [2023-09-01 11:47:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:47:59,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:47:59,570 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:47:59,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 11:47:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 11:47:59,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:47:59,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:47:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1050703873, now seen corresponding path program 1 times [2023-09-01 11:47:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:47:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485646589] [2023-09-01 11:47:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:47:59,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:47:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:00,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:00,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485646589] [2023-09-01 11:48:00,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485646589] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:00,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266511329] [2023-09-01 11:48:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:00,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:00,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:00,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:48:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:00,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266511329] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:00,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:48:00,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2023-09-01 11:48:00,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433726599] [2023-09-01 11:48:00,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:00,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:00,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 11:48:00,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-09-01 11:48:00,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 475 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:00,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-09-01 11:48:00,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:00,914 INFO L130 PetriNetUnfolder]: 2188/3163 cut-off events. [2023-09-01 11:48:00,914 INFO L131 PetriNetUnfolder]: For 9105/9105 co-relation queries the response was YES. [2023-09-01 11:48:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12221 conditions, 3163 events. 2188/3163 cut-off events. For 9105/9105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14004 event pairs, 180 based on Foata normal form. 76/3027 useless extension candidates. Maximal degree in co-relation 12109. Up to 2033 conditions per place. [2023-09-01 11:48:00,933 INFO L137 encePairwiseOnDemand]: 669/676 looper letters, 93 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2023-09-01 11:48:00,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 857 flow [2023-09-01 11:48:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:48:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:48:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-09-01 11:48:00,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-09-01 11:48:00,938 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-09-01 11:48:00,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-09-01 11:48:00,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:00,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-09-01 11:48:00,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,945 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 475 flow. Second operand 5 states and 1489 transitions. [2023-09-01 11:48:00,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 857 flow [2023-09-01 11:48:00,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 790 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-09-01 11:48:00,969 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 499 flow [2023-09-01 11:48:00,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-09-01 11:48:00,970 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2023-09-01 11:48:00,970 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 499 flow [2023-09-01 11:48:00,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:00,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:00,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:00,977 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 11:48:01,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 11:48:01,177 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:01,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 80380509, now seen corresponding path program 2 times [2023-09-01 11:48:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35378226] [2023-09-01 11:48:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:01,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35378226] [2023-09-01 11:48:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35378226] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504570997] [2023-09-01 11:48:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:48:01,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:01,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:01,469 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:01,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:48:01,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:48:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:01,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504570997] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:48:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383600762] [2023-09-01 11:48:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:48:01,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-09-01 11:48:01,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:01,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:01,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-09-01 11:48:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:02,375 INFO L130 PetriNetUnfolder]: 2170/3145 cut-off events. [2023-09-01 11:48:02,376 INFO L131 PetriNetUnfolder]: For 9206/9206 co-relation queries the response was YES. [2023-09-01 11:48:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 3145 events. 2170/3145 cut-off events. For 9206/9206 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13915 event pairs, 752 based on Foata normal form. 18/2951 useless extension candidates. Maximal degree in co-relation 11951. Up to 1803 conditions per place. [2023-09-01 11:48:02,391 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 82 selfloop transitions, 15 changer transitions 0/97 dead transitions. [2023-09-01 11:48:02,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 787 flow [2023-09-01 11:48:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:48:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:48:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-09-01 11:48:02,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-09-01 11:48:02,395 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-09-01 11:48:02,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-09-01 11:48:02,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:02,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-09-01 11:48:02,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,403 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,403 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 499 flow. Second operand 5 states and 1489 transitions. [2023-09-01 11:48:02,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 787 flow [2023-09-01 11:48:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 768 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 11:48:02,424 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 535 flow [2023-09-01 11:48:02,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-09-01 11:48:02,425 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 43 predicate places. [2023-09-01 11:48:02,425 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 535 flow [2023-09-01 11:48:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:02,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 11:48:02,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 11:48:02,632 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:02,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash 370126421, now seen corresponding path program 3 times [2023-09-01 11:48:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976921619] [2023-09-01 11:48:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:02,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976921619] [2023-09-01 11:48:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976921619] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027492130] [2023-09-01 11:48:02,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:48:02,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:02,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:02,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:48:03,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:48:03,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:03,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027492130] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:03,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:48:03,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455908007] [2023-09-01 11:48:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:03,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:48:03,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-09-01 11:48:03,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:03,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:03,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-09-01 11:48:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:03,662 INFO L130 PetriNetUnfolder]: 2260/3275 cut-off events. [2023-09-01 11:48:03,662 INFO L131 PetriNetUnfolder]: For 10263/10263 co-relation queries the response was YES. [2023-09-01 11:48:03,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13182 conditions, 3275 events. 2260/3275 cut-off events. For 10263/10263 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14490 event pairs, 770 based on Foata normal form. 76/3131 useless extension candidates. Maximal degree in co-relation 13070. Up to 1825 conditions per place. [2023-09-01 11:48:03,678 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 94 selfloop transitions, 16 changer transitions 1/111 dead transitions. [2023-09-01 11:48:03,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 894 flow [2023-09-01 11:48:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:48:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:48:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-09-01 11:48:03,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395956607495069 [2023-09-01 11:48:03,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-09-01 11:48:03,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-09-01 11:48:03,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:03,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-09-01 11:48:03,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:03,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:03,693 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 676.0) internal successors, (4732), 7 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:03,693 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 535 flow. Second operand 6 states and 1783 transitions. [2023-09-01 11:48:03,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 894 flow [2023-09-01 11:48:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 862 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 11:48:03,720 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 544 flow [2023-09-01 11:48:03,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-09-01 11:48:03,721 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-09-01 11:48:03,721 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 544 flow [2023-09-01 11:48:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:03,731 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 11:48:03,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 11:48:03,931 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:03,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1112195801, now seen corresponding path program 4 times [2023-09-01 11:48:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015711444] [2023-09-01 11:48:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:04,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015711444] [2023-09-01 11:48:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015711444] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078828356] [2023-09-01 11:48:04,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:48:04,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:04,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:04,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:04,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:48:04,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:48:04,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:04,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078828356] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:04,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:04,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:48:04,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354922349] [2023-09-01 11:48:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:04,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:04,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:48:04,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 676 [2023-09-01 11:48:04,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 291.8) internal successors, (1459), 5 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:04,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:04,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 676 [2023-09-01 11:48:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:04,993 INFO L130 PetriNetUnfolder]: 2242/3257 cut-off events. [2023-09-01 11:48:04,994 INFO L131 PetriNetUnfolder]: For 12776/12776 co-relation queries the response was YES. [2023-09-01 11:48:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13563 conditions, 3257 events. 2242/3257 cut-off events. For 12776/12776 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14440 event pairs, 847 based on Foata normal form. 18/3055 useless extension candidates. Maximal degree in co-relation 13450. Up to 2087 conditions per place. [2023-09-01 11:48:05,009 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 87 selfloop transitions, 13 changer transitions 9/109 dead transitions. [2023-09-01 11:48:05,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 924 flow [2023-09-01 11:48:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:48:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:48:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1498 transitions. [2023-09-01 11:48:05,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44319526627218936 [2023-09-01 11:48:05,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1498 transitions. [2023-09-01 11:48:05,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1498 transitions. [2023-09-01 11:48:05,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:05,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1498 transitions. [2023-09-01 11:48:05,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.6) internal successors, (1498), 5 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,024 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 544 flow. Second operand 5 states and 1498 transitions. [2023-09-01 11:48:05,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 924 flow [2023-09-01 11:48:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 109 transitions, 877 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 11:48:05,052 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 555 flow [2023-09-01 11:48:05,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2023-09-01 11:48:05,053 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 47 predicate places. [2023-09-01 11:48:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 555 flow [2023-09-01 11:48:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 291.8) internal successors, (1459), 5 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:05,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:05,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:05,260 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:05,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash -293042749, now seen corresponding path program 5 times [2023-09-01 11:48:05,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:05,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574147149] [2023-09-01 11:48:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574147149] [2023-09-01 11:48:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574147149] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399416649] [2023-09-01 11:48:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:48:05,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:05,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:05,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:05,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 11:48:05,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:48:05,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:05,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399416649] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:05,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:48:05,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 11 [2023-09-01 11:48:05,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747918889] [2023-09-01 11:48:05,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:05,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 11:48:06,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 676 [2023-09-01 11:48:06,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 555 flow. Second operand has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:06,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 676 [2023-09-01 11:48:06,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:06,505 INFO L130 PetriNetUnfolder]: 2141/3138 cut-off events. [2023-09-01 11:48:06,505 INFO L131 PetriNetUnfolder]: For 13140/13140 co-relation queries the response was YES. [2023-09-01 11:48:06,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13278 conditions, 3138 events. 2141/3138 cut-off events. For 13140/13140 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13910 event pairs, 847 based on Foata normal form. 76/2998 useless extension candidates. Maximal degree in co-relation 13164. Up to 2087 conditions per place. [2023-09-01 11:48:06,522 INFO L137 encePairwiseOnDemand]: 671/676 looper letters, 92 selfloop transitions, 15 changer transitions 1/108 dead transitions. [2023-09-01 11:48:06,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 913 flow [2023-09-01 11:48:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:48:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:48:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1491 transitions. [2023-09-01 11:48:06,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411242603550296 [2023-09-01 11:48:06,526 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1491 transitions. [2023-09-01 11:48:06,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1491 transitions. [2023-09-01 11:48:06,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:06,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1491 transitions. [2023-09-01 11:48:06,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.2) internal successors, (1491), 5 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,533 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 555 flow. Second operand 5 states and 1491 transitions. [2023-09-01 11:48:06,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 913 flow [2023-09-01 11:48:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 884 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 11:48:06,563 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 577 flow [2023-09-01 11:48:06,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2023-09-01 11:48:06,563 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-09-01 11:48:06,563 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 577 flow [2023-09-01 11:48:06,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.8) internal successors, (1449), 5 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:06,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:06,564 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:06,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 11:48:06,771 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:06,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2055287147, now seen corresponding path program 6 times [2023-09-01 11:48:06,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:06,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844695823] [2023-09-01 11:48:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844695823] [2023-09-01 11:48:07,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844695823] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429659912] [2023-09-01 11:48:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:48:07,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:07,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:07,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 11:48:07,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:48:07,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:07,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:48:07,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:07,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:48:07,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429659912] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:48:07,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:48:07,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2023-09-01 11:48:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896928073] [2023-09-01 11:48:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:48:07,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:48:07,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:48:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:48:07,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 676 [2023-09-01 11:48:07,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:07,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 676 [2023-09-01 11:48:07,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:07,859 INFO L130 PetriNetUnfolder]: 2023/2941 cut-off events. [2023-09-01 11:48:07,859 INFO L131 PetriNetUnfolder]: For 10935/10935 co-relation queries the response was YES. [2023-09-01 11:48:07,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 2941 events. 2023/2941 cut-off events. For 10935/10935 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12653 event pairs, 847 based on Foata normal form. 18/2759 useless extension candidates. Maximal degree in co-relation 12053. Up to 2087 conditions per place. [2023-09-01 11:48:07,876 INFO L137 encePairwiseOnDemand]: 670/676 looper letters, 76 selfloop transitions, 15 changer transitions 10/101 dead transitions. [2023-09-01 11:48:07,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 101 transitions, 881 flow [2023-09-01 11:48:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:48:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:48:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1489 transitions. [2023-09-01 11:48:07,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405325443786982 [2023-09-01 11:48:07,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1489 transitions. [2023-09-01 11:48:07,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1489 transitions. [2023-09-01 11:48:07,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:07,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1489 transitions. [2023-09-01 11:48:07,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.8) internal successors, (1489), 5 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,887 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 676.0) internal successors, (4056), 6 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,887 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 577 flow. Second operand 5 states and 1489 transitions. [2023-09-01 11:48:07,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 101 transitions, 881 flow [2023-09-01 11:48:07,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 101 transitions, 859 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 11:48:07,914 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 573 flow [2023-09-01 11:48:07,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-09-01 11:48:07,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2023-09-01 11:48:07,914 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 573 flow [2023-09-01 11:48:07,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 290.8) internal successors, (1454), 5 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:07,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:07,915 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:07,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 11:48:08,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 11:48:08,122 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:08,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1707227891, now seen corresponding path program 1 times [2023-09-01 11:48:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:08,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399078055] [2023-09-01 11:48:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-09-01 11:48:08,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399078055] [2023-09-01 11:48:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399078055] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491748096] [2023-09-01 11:48:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:08,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:08,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 11:48:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 82 conjunts are in the unsatisfiable core [2023-09-01 11:48:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:08,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:48:08,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:48:09,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:09,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 11:48:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:09,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:11,578 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (.cse3 (< |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (and (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse1 (select (select .cse0 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) .cse1) (< .cse2 .cse1) (< .cse1 .cse2))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse6 (select (select .cse7 ~o_4~0.base) c_~o_4~0.offset)) (.cse8 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse4 (select .cse7 ~o_2~0.base))) (or (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= (select .cse4 c_~o_2~0.offset) .cse6)))) (< .cse8 .cse6) (< .cse6 .cse8))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse10 (select (select .cse11 ~o_4~0.base) c_~o_4~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse9 (select .cse11 ~o_2~0.base))) (or (not (= (select .cse9 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< .cse10 (select .cse9 c_~o_2~0.offset))))) (<= (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset) .cse10))))) (or .cse3 (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse13 (select (select .cse12 ~o_4~0.base) c_~o_4~0.offset))) (or (<= (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset) .cse13) (< .cse13 (select (select .cse12 ~o_2~0.base) c_~o_2~0.offset))))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse14 (select (select .cse15 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse14 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (< (select (select .cse15 ~o_2~0.base) c_~o_2~0.offset) .cse14))))) .cse3) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse16 (select (select .cse17 ~o_4~0.base) c_~o_4~0.offset))) (or (<= .cse16 (select (select .cse17 c_~o_0~0.base) c_~o_0~0.offset)) (forall ((~o_2~0.base Int)) (let ((.cse18 (select .cse17 ~o_2~0.base))) (or (not (= (select .cse18 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (< (select .cse18 c_~o_2~0.offset) .cse16)))))))) (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse20 (select (select .cse21 ~o_4~0.base) c_~o_4~0.offset)) (.cse22 (select (select .cse21 c_~o_0~0.base) c_~o_0~0.offset))) (or (forall ((~o_2~0.base Int)) (let ((.cse19 (select .cse21 ~o_2~0.base))) (or (not (= (select .cse19 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (<= .cse20 (select .cse19 c_~o_2~0.offset))))) (< .cse22 .cse20) (< .cse20 .cse22))))) (or (forall ((~o_4~0.base Int) (v_ArrVal_1831 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1831))) (let ((.cse23 (select (select .cse24 ~o_4~0.base) c_~o_4~0.offset)) (.cse25 (select (select .cse24 c_~o_0~0.base) c_~o_0~0.offset))) (or (<= .cse23 (select (select .cse24 ~o_2~0.base) c_~o_2~0.offset)) (< .cse25 .cse23) (< .cse23 .cse25))))) .cse3))) is different from false [2023-09-01 11:48:11,730 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-09-01 11:48:11,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 273 [2023-09-01 11:48:11,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:48:11,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-09-01 11:48:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:48:15,161 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:48:15,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 1 [2023-09-01 11:48:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:48:15,170 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:48:15,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-09-01 11:48:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:48:15,178 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:48:15,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 1 [2023-09-01 11:48:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:15,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491748096] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:15,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 16, 14] total 34 [2023-09-01 11:48:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699316165] [2023-09-01 11:48:15,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 11:48:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 11:48:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1005, Unknown=1, NotChecked=64, Total=1190 [2023-09-01 11:48:15,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 676 [2023-09-01 11:48:15,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 573 flow. Second operand has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:15,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:15,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 676 [2023-09-01 11:48:15,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:19,157 INFO L130 PetriNetUnfolder]: 3918/5639 cut-off events. [2023-09-01 11:48:19,157 INFO L131 PetriNetUnfolder]: For 25606/25606 co-relation queries the response was YES. [2023-09-01 11:48:19,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23438 conditions, 5639 events. 3918/5639 cut-off events. For 25606/25606 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27801 event pairs, 749 based on Foata normal form. 2/5273 useless extension candidates. Maximal degree in co-relation 23323. Up to 1655 conditions per place. [2023-09-01 11:48:19,181 INFO L137 encePairwiseOnDemand]: 660/676 looper letters, 219 selfloop transitions, 55 changer transitions 114/388 dead transitions. [2023-09-01 11:48:19,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 388 transitions, 4182 flow [2023-09-01 11:48:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:48:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:48:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5063 transitions. [2023-09-01 11:48:19,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34043840774610007 [2023-09-01 11:48:19,193 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5063 transitions. [2023-09-01 11:48:19,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5063 transitions. [2023-09-01 11:48:19,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:19,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5063 transitions. [2023-09-01 11:48:19,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 230.13636363636363) internal successors, (5063), 22 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,215 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 676.0) internal successors, (15548), 23 states have internal predecessors, (15548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,215 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 573 flow. Second operand 22 states and 5063 transitions. [2023-09-01 11:48:19,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 388 transitions, 4182 flow [2023-09-01 11:48:19,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 388 transitions, 3752 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-09-01 11:48:19,256 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 1297 flow [2023-09-01 11:48:19,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1297, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2023-09-01 11:48:19,256 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 81 predicate places. [2023-09-01 11:48:19,256 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 1297 flow [2023-09-01 11:48:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 223.57142857142858) internal successors, (7825), 35 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:19,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:19,258 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:19,269 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 11:48:19,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:19,465 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 361103584, now seen corresponding path program 2 times [2023-09-01 11:48:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:19,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910901738] [2023-09-01 11:48:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:48:19,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:19,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910901738] [2023-09-01 11:48:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910901738] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:19,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807212106] [2023-09-01 11:48:19,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:48:19,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:19,744 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:19,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 11:48:20,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:48:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 11:48:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:20,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:48:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807212106] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:20,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:20,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 10] total 24 [2023-09-01 11:48:20,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905665158] [2023-09-01 11:48:20,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:20,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:48:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:48:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:48:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 676 [2023-09-01 11:48:21,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 1297 flow. Second operand has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:21,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:21,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 676 [2023-09-01 11:48:21,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:48:25,744 INFO L130 PetriNetUnfolder]: 9070/13068 cut-off events. [2023-09-01 11:48:25,744 INFO L131 PetriNetUnfolder]: For 124535/124535 co-relation queries the response was YES. [2023-09-01 11:48:25,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75424 conditions, 13068 events. 9070/13068 cut-off events. For 124535/124535 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70112 event pairs, 731 based on Foata normal form. 9/13077 useless extension candidates. Maximal degree in co-relation 75374. Up to 3195 conditions per place. [2023-09-01 11:48:25,809 INFO L137 encePairwiseOnDemand]: 661/676 looper letters, 325 selfloop transitions, 267 changer transitions 369/961 dead transitions. [2023-09-01 11:48:25,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 961 transitions, 12493 flow [2023-09-01 11:48:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 11:48:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 11:48:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 13974 transitions. [2023-09-01 11:48:25,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40532544378698226 [2023-09-01 11:48:25,833 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 13974 transitions. [2023-09-01 11:48:25,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 13974 transitions. [2023-09-01 11:48:25,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:48:25,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 13974 transitions. [2023-09-01 11:48:25,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 274.0) internal successors, (13974), 51 states have internal predecessors, (13974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,891 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 676.0) internal successors, (35152), 52 states have internal predecessors, (35152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:25,891 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 1297 flow. Second operand 51 states and 13974 transitions. [2023-09-01 11:48:25,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 961 transitions, 12493 flow [2023-09-01 11:48:26,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 961 transitions, 11350 flow, removed 559 selfloop flow, removed 8 redundant places. [2023-09-01 11:48:26,339 INFO L231 Difference]: Finished difference. Result has 192 places, 388 transitions, 5981 flow [2023-09-01 11:48:26,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5981, PETRI_PLACES=192, PETRI_TRANSITIONS=388} [2023-09-01 11:48:26,340 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 158 predicate places. [2023-09-01 11:48:26,340 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 388 transitions, 5981 flow [2023-09-01 11:48:26,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 267.08) internal successors, (6677), 25 states have internal predecessors, (6677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:26,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:48:26,341 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:48:26,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 11:48:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:26,542 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:48:26,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:48:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -489564831, now seen corresponding path program 3 times [2023-09-01 11:48:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:48:26,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492459232] [2023-09-01 11:48:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:48:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:48:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:48:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-09-01 11:48:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:48:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492459232] [2023-09-01 11:48:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492459232] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:48:29,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943384598] [2023-09-01 11:48:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:48:29,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:48:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:48:29,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:48:29,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 11:48:29,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 11:48:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:48:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 85 conjunts are in the unsatisfiable core [2023-09-01 11:48:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:48:30,661 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 11:48:30,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2023-09-01 11:48:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-09-01 11:48:30,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:48:32,636 INFO L321 Elim1Store]: treesize reduction 19, result has 90.7 percent of original size [2023-09-01 11:48:32,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 199 [2023-09-01 11:48:35,817 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:48:35,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-09-01 11:48:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-09-01 11:48:35,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943384598] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:48:35,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:48:35,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 39 [2023-09-01 11:48:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15988921] [2023-09-01 11:48:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:48:35,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 11:48:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:48:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 11:48:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2023-09-01 11:48:39,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 676 [2023-09-01 11:48:39,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 388 transitions, 5981 flow. Second operand has 40 states, 40 states have (on average 244.075) internal successors, (9763), 40 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:48:39,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:48:39,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 676 [2023-09-01 11:48:39,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:07,038 INFO L130 PetriNetUnfolder]: 15096/21763 cut-off events. [2023-09-01 11:49:07,038 INFO L131 PetriNetUnfolder]: For 437570/437570 co-relation queries the response was YES. [2023-09-01 11:49:07,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169243 conditions, 21763 events. 15096/21763 cut-off events. For 437570/437570 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 124707 event pairs, 1042 based on Foata normal form. 45/21808 useless extension candidates. Maximal degree in co-relation 169103. Up to 6203 conditions per place. [2023-09-01 11:49:07,222 INFO L137 encePairwiseOnDemand]: 658/676 looper letters, 648 selfloop transitions, 844 changer transitions 253/1745 dead transitions. [2023-09-01 11:49:07,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1745 transitions, 27640 flow [2023-09-01 11:49:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-09-01 11:49:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-09-01 11:49:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 23256 transitions. [2023-09-01 11:49:07,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699179232677992 [2023-09-01 11:49:07,250 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 23256 transitions. [2023-09-01 11:49:07,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 23256 transitions. [2023-09-01 11:49:07,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:07,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 23256 transitions. [2023-09-01 11:49:07,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 250.06451612903226) internal successors, (23256), 93 states have internal predecessors, (23256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,425 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 676.0) internal successors, (63544), 94 states have internal predecessors, (63544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:07,425 INFO L175 Difference]: Start difference. First operand has 192 places, 388 transitions, 5981 flow. Second operand 93 states and 23256 transitions. [2023-09-01 11:49:07,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1745 transitions, 27640 flow [2023-09-01 11:49:11,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 1745 transitions, 24299 flow, removed 1665 selfloop flow, removed 24 redundant places. [2023-09-01 11:49:11,054 INFO L231 Difference]: Finished difference. Result has 285 places, 1104 transitions, 17571 flow [2023-09-01 11:49:11,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=17571, PETRI_PLACES=285, PETRI_TRANSITIONS=1104} [2023-09-01 11:49:11,055 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2023-09-01 11:49:11,055 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1104 transitions, 17571 flow [2023-09-01 11:49:11,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 244.075) internal successors, (9763), 40 states have internal predecessors, (9763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:11,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:11,057 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:11,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 11:49:11,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:11,257 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:49:11,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash -541040723, now seen corresponding path program 4 times [2023-09-01 11:49:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:11,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263559291] [2023-09-01 11:49:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-09-01 11:49:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263559291] [2023-09-01 11:49:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263559291] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087284889] [2023-09-01 11:49:14,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:49:14,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:14,420 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:49:14,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 11:49:14,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:49:14,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 84 conjunts are in the unsatisfiable core [2023-09-01 11:49:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:49:14,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:49:15,366 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:49:15,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-09-01 11:49:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-09-01 11:49:15,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:49:16,706 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse4 (select .cse3 ~o_2~0.base))) (or (forall ((~o_4~0.base Int)) (let ((.cse0 (select .cse4 c_~o_2~0.offset)) (.cse1 (select (select .cse3 ~o_4~0.base) c_~o_4~0.offset)) (.cse2 (select (select .cse3 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse0 .cse1) (= .cse2 .cse1) (< .cse0 .cse1) (< .cse1 .cse2)))) (not (= (select .cse4 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)))))) (forall ((v_ArrVal_2156 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2156))) (let ((.cse6 (select .cse9 ~o_2~0.base))) (or (not (= (select .cse6 .cse5) |c_thread1Thread1of1ForFork2_#t~mem1#1|)) (forall ((~o_4~0.base Int)) (let ((.cse7 (select .cse6 c_~o_2~0.offset)) (.cse8 (select (select .cse9 ~o_4~0.base) c_~o_4~0.offset))) (or (= .cse7 .cse8) (< .cse8 .cse7) (<= (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) .cse8)))))))))) is different from false [2023-09-01 11:49:16,848 INFO L321 Elim1Store]: treesize reduction 23, result has 81.0 percent of original size [2023-09-01 11:49:16,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 269 [2023-09-01 11:49:16,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:49:16,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 198 [2023-09-01 11:49:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:49:20,890 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:49:20,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 1 [2023-09-01 11:49:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-09-01 11:49:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087284889] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:49:20,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:49:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 14] total 48 [2023-09-01 11:49:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925402382] [2023-09-01 11:49:20,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:49:20,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 11:49:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:49:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 11:49:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2173, Unknown=1, NotChecked=94, Total=2450 [2023-09-01 11:49:21,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 676 [2023-09-01 11:49:21,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1104 transitions, 17571 flow. Second operand has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:21,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:49:21,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 676 [2023-09-01 11:49:21,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:49:40,265 INFO L130 PetriNetUnfolder]: 23286/33325 cut-off events. [2023-09-01 11:49:40,265 INFO L131 PetriNetUnfolder]: For 1557338/1557338 co-relation queries the response was YES. [2023-09-01 11:49:40,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342277 conditions, 33325 events. 23286/33325 cut-off events. For 1557338/1557338 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 200788 event pairs, 1080 based on Foata normal form. 24/33349 useless extension candidates. Maximal degree in co-relation 342080. Up to 9262 conditions per place. [2023-09-01 11:49:40,745 INFO L137 encePairwiseOnDemand]: 655/676 looper letters, 1351 selfloop transitions, 1097 changer transitions 141/2589 dead transitions. [2023-09-01 11:49:40,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2589 transitions, 48666 flow [2023-09-01 11:49:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 11:49:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 11:49:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 11553 transitions. [2023-09-01 11:49:40,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051827979712595 [2023-09-01 11:49:40,761 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 11553 transitions. [2023-09-01 11:49:40,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 11553 transitions. [2023-09-01 11:49:40,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:49:40,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 11553 transitions. [2023-09-01 11:49:40,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 206.30357142857142) internal successors, (11553), 56 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:40,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:40,813 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 676.0) internal successors, (38532), 57 states have internal predecessors, (38532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:40,813 INFO L175 Difference]: Start difference. First operand has 285 places, 1104 transitions, 17571 flow. Second operand 56 states and 11553 transitions. [2023-09-01 11:49:40,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2589 transitions, 48666 flow [2023-09-01 11:49:54,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 2589 transitions, 45133 flow, removed 1696 selfloop flow, removed 10 redundant places. [2023-09-01 11:49:55,012 INFO L231 Difference]: Finished difference. Result has 353 places, 1657 transitions, 29562 flow [2023-09-01 11:49:55,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=676, PETRI_DIFFERENCE_MINUEND_FLOW=15470, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29562, PETRI_PLACES=353, PETRI_TRANSITIONS=1657} [2023-09-01 11:49:55,013 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 319 predicate places. [2023-09-01 11:49:55,013 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1657 transitions, 29562 flow [2023-09-01 11:49:55,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 200.02) internal successors, (10001), 50 states have internal predecessors, (10001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:49:55,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:49:55,015 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:49:55,020 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 11:49:55,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 11:49:55,215 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:49:55,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:49:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1981758789, now seen corresponding path program 5 times [2023-09-01 11:49:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:49:55,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673398864] [2023-09-01 11:49:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:49:55,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:49:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:49:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 11:49:58,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:49:58,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673398864] [2023-09-01 11:49:58,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673398864] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:49:58,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818628509] [2023-09-01 11:49:58,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:49:58,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:49:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:49:58,933 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:49:58,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 11:49:59,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-09-01 11:49:59,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:49:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 80 conjunts are in the unsatisfiable core [2023-09-01 11:49:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:49:59,938 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:49:59,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2023-09-01 11:50:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 11:50:00,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:50:01,364 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-09-01 11:50:01,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 98 [2023-09-01 11:50:01,461 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-09-01 11:50:01,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 1 [2023-09-01 11:50:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-09-01 11:50:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818628509] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:50:01,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:50:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 12] total 51 [2023-09-01 11:50:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879946194] [2023-09-01 11:50:01,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:50:01,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-09-01 11:50:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:50:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-09-01 11:50:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2023-09-01 11:50:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 676 [2023-09-01 11:50:07,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1657 transitions, 29562 flow. Second operand has 52 states, 52 states have (on average 226.90384615384616) internal successors, (11799), 52 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:50:07,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:50:07,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 676 [2023-09-01 11:50:07,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:52:09,148 INFO L130 PetriNetUnfolder]: 155389/221984 cut-off events. [2023-09-01 11:52:09,149 INFO L131 PetriNetUnfolder]: For 12561849/12561849 co-relation queries the response was YES. [2023-09-01 11:52:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448562 conditions, 221984 events. 155389/221984 cut-off events. For 12561849/12561849 co-relation queries the response was YES. Maximal size of possible extension queue 5366. Compared 1680300 event pairs, 11732 based on Foata normal form. 88/222072 useless extension candidates. Maximal degree in co-relation 2448327. Up to 60896 conditions per place. [2023-09-01 11:52:15,042 INFO L137 encePairwiseOnDemand]: 656/676 looper letters, 6731 selfloop transitions, 8345 changer transitions 236/15312 dead transitions. [2023-09-01 11:52:15,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 15312 transitions, 320909 flow [2023-09-01 11:52:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2023-09-01 11:52:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2023-09-01 11:52:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 48516 transitions. [2023-09-01 11:52:15,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34504437869822485 [2023-09-01 11:52:15,084 INFO L72 ComplementDD]: Start complementDD. Operand 208 states and 48516 transitions. [2023-09-01 11:52:15,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 48516 transitions. [2023-09-01 11:52:15,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:52:15,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 208 states and 48516 transitions. [2023-09-01 11:52:15,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 209 states, 208 states have (on average 233.25) internal successors, (48516), 208 states have internal predecessors, (48516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:15,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 209 states, 209 states have (on average 676.0) internal successors, (141284), 209 states have internal predecessors, (141284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:15,271 INFO L81 ComplementDD]: Finished complementDD. Result has 209 states, 209 states have (on average 676.0) internal successors, (141284), 209 states have internal predecessors, (141284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:52:15,272 INFO L175 Difference]: Start difference. First operand has 353 places, 1657 transitions, 29562 flow. Second operand 208 states and 48516 transitions. [2023-09-01 11:52:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 15312 transitions, 320909 flow Killed by 15