./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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 ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:15:15,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:15:15,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:15:15,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:15:15,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:15:15,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:15:15,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:15:15,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:15:15,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:15:15,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:15:15,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:15:15,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:15:15,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:15:15,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:15:15,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:15:15,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:15:15,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:15:15,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:15:15,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:15:15,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:15:15,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:15:15,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:15:15,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:15:15,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:15:15,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:15:15,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:15:15,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:15:15,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:15:15,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:15:15,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:15:15,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:15:15,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:15:15,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:15:15,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:15:15,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:15:15,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:15:15,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:15:15,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:15:15,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:15:15,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:15:15,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:15:15,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:15:15,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:15:15,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:15:15,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:15:15,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:15:15,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:15:15,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:15:15,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:15:15,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:15:15,708 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:15:15,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:15:15,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:15:15,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:15:15,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:15:15,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:15:15,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:15:15,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:15:15,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:15:15,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:15:15,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:15:15,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:15:15,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:15:15,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:15:15,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:15:15,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 [2021-12-14 15:15:15,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:15:15,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:15:15,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:15:15,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:15:15,950 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:15:15,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:15:15,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9345af4/ee2e9240833b4736b4e3ac43cb8627f3/FLAGde94633f7 [2021-12-14 15:15:16,403 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:15:16,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:15:16,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9345af4/ee2e9240833b4736b4e3ac43cb8627f3/FLAGde94633f7 [2021-12-14 15:15:16,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba9345af4/ee2e9240833b4736b4e3ac43cb8627f3 [2021-12-14 15:15:16,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:15:16,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:15:16,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:15:16,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:15:16,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:15:16,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1660df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16, skipping insertion in model container [2021-12-14 15:15:16,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:15:16,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:15:16,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-12-14 15:15:16,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:15:16,773 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:15:16,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-12-14 15:15:16,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:15:16,823 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:15:16,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16 WrapperNode [2021-12-14 15:15:16,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:15:16,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:15:16,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:15:16,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:15:16,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,869 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 620 [2021-12-14 15:15:16,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:15:16,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:15:16,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:15:16,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:15:16,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:15:16,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:15:16,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:15:16,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:15:16,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (1/1) ... [2021-12-14 15:15:16,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:15:16,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:15:16,945 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) [2021-12-14 15:15:16,951 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 [2021-12-14 15:15:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:15:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:15:16,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:15:16,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:15:17,135 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:15:17,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:15:17,541 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:15:17,549 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:15:17,550 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:15:17,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:17 BoogieIcfgContainer [2021-12-14 15:15:17,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:15:17,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:15:17,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:15:17,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:15:17,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:15:16" (1/3) ... [2021-12-14 15:15:17,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7790e15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:17, skipping insertion in model container [2021-12-14 15:15:17,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:16" (2/3) ... [2021-12-14 15:15:17,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7790e15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:17, skipping insertion in model container [2021-12-14 15:15:17,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:17" (3/3) ... [2021-12-14 15:15:17,556 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-14 15:15:17,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:15:17,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:15:17,597 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:15:17,602 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 15:15:17,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:15:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 164 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:15:17,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:17,628 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:15:17,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2011282842, now seen corresponding path program 1 times [2021-12-14 15:15:17,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:17,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884936204] [2021-12-14 15:15:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:17,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:17,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884936204] [2021-12-14 15:15:17,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884936204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:17,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:17,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:17,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097011891] [2021-12-14 15:15:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:17,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:17,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:17,922 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 164 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:17,999 INFO L93 Difference]: Finished difference Result 391 states and 633 transitions. [2021-12-14 15:15:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:15:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:18,019 INFO L225 Difference]: With dead ends: 391 [2021-12-14 15:15:18,020 INFO L226 Difference]: Without dead ends: 264 [2021-12-14 15:15:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,024 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 205 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:18,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 592 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-14 15:15:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-12-14 15:15:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5019157088122606) internal successors, (392), 261 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 392 transitions. [2021-12-14 15:15:18,064 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 392 transitions. Word has length 74 [2021-12-14 15:15:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:18,065 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 392 transitions. [2021-12-14 15:15:18,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 392 transitions. [2021-12-14 15:15:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 15:15:18,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:18,067 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:15:18,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:15:18,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash -141824057, now seen corresponding path program 1 times [2021-12-14 15:15:18,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241578842] [2021-12-14 15:15:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:18,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:18,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241578842] [2021-12-14 15:15:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241578842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:18,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:18,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:18,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050079760] [2021-12-14 15:15:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:18,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:18,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,152 INFO L87 Difference]: Start difference. First operand 262 states and 392 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:18,183 INFO L93 Difference]: Finished difference Result 666 states and 1036 transitions. [2021-12-14 15:15:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:18,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-14 15:15:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:18,188 INFO L225 Difference]: With dead ends: 666 [2021-12-14 15:15:18,188 INFO L226 Difference]: Without dead ends: 448 [2021-12-14 15:15:18,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,190 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 166 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:18,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 520 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-14 15:15:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 446. [2021-12-14 15:15:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5393258426966292) internal successors, (685), 445 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 685 transitions. [2021-12-14 15:15:18,228 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 685 transitions. Word has length 75 [2021-12-14 15:15:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:18,229 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 685 transitions. [2021-12-14 15:15:18,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 685 transitions. [2021-12-14 15:15:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 15:15:18,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:18,233 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:15:18,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:15:18,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash 890430339, now seen corresponding path program 1 times [2021-12-14 15:15:18,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042766336] [2021-12-14 15:15:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:18,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:18,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042766336] [2021-12-14 15:15:18,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042766336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:18,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:18,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:18,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893389469] [2021-12-14 15:15:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:18,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:18,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,309 INFO L87 Difference]: Start difference. First operand 446 states and 685 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:18,349 INFO L93 Difference]: Finished difference Result 1186 states and 1863 transitions. [2021-12-14 15:15:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-14 15:15:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:18,364 INFO L225 Difference]: With dead ends: 1186 [2021-12-14 15:15:18,364 INFO L226 Difference]: Without dead ends: 784 [2021-12-14 15:15:18,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,369 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 161 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:18,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 505 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-14 15:15:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 782. [2021-12-14 15:15:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.558258642765685) internal successors, (1217), 781 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1217 transitions. [2021-12-14 15:15:18,415 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1217 transitions. Word has length 76 [2021-12-14 15:15:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:18,417 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1217 transitions. [2021-12-14 15:15:18,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1217 transitions. [2021-12-14 15:15:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 15:15:18,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:18,421 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:15:18,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:15:18,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash -806203398, now seen corresponding path program 1 times [2021-12-14 15:15:18,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346574604] [2021-12-14 15:15:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:18,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:18,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346574604] [2021-12-14 15:15:18,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346574604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:18,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:18,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:18,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230795716] [2021-12-14 15:15:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:18,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:18,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,486 INFO L87 Difference]: Start difference. First operand 782 states and 1217 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:18,520 INFO L93 Difference]: Finished difference Result 2130 states and 3355 transitions. [2021-12-14 15:15:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 15:15:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:18,526 INFO L225 Difference]: With dead ends: 2130 [2021-12-14 15:15:18,526 INFO L226 Difference]: Without dead ends: 1392 [2021-12-14 15:15:18,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,534 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:18,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 490 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-12-14 15:15:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1390. [2021-12-14 15:15:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.564434845212383) internal successors, (2173), 1389 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2173 transitions. [2021-12-14 15:15:18,574 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2173 transitions. Word has length 77 [2021-12-14 15:15:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 2173 transitions. [2021-12-14 15:15:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2173 transitions. [2021-12-14 15:15:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 15:15:18,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:18,578 INFO L514 BasicCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:15:18,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:15:18,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -904090240, now seen corresponding path program 1 times [2021-12-14 15:15:18,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:18,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21145810] [2021-12-14 15:15:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:18,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:18,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:18,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21145810] [2021-12-14 15:15:18,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21145810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:18,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:18,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:18,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195713737] [2021-12-14 15:15:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,639 INFO L87 Difference]: Start difference. First operand 1390 states and 2173 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:18,698 INFO L93 Difference]: Finished difference Result 3826 states and 6015 transitions. [2021-12-14 15:15:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-14 15:15:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:18,706 INFO L225 Difference]: With dead ends: 3826 [2021-12-14 15:15:18,706 INFO L226 Difference]: Without dead ends: 2480 [2021-12-14 15:15:18,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:18,712 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 151 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:18,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 475 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-12-14 15:15:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2478. [2021-12-14 15:15:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 1.5619701251513929) internal successors, (3869), 2477 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3869 transitions. [2021-12-14 15:15:18,813 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3869 transitions. Word has length 78 [2021-12-14 15:15:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:18,814 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3869 transitions. [2021-12-14 15:15:18,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3869 transitions. [2021-12-14 15:15:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 15:15:18,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:18,817 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-14 15:15:18,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:15:18,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1797609537, now seen corresponding path program 1 times [2021-12-14 15:15:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:18,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265137210] [2021-12-14 15:15:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:18,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:18,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265137210] [2021-12-14 15:15:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265137210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:18,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:18,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:15:18,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132005849] [2021-12-14 15:15:18,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:18,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 15:15:18,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:18,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 15:15:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:15:18,916 INFO L87 Difference]: Start difference. First operand 2478 states and 3869 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:19,517 INFO L93 Difference]: Finished difference Result 19516 states and 30644 transitions. [2021-12-14 15:15:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 15:15:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 15:15:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:19,573 INFO L225 Difference]: With dead ends: 19516 [2021-12-14 15:15:19,573 INFO L226 Difference]: Without dead ends: 17082 [2021-12-14 15:15:19,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:15:19,582 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 2601 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2601 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:19,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2601 Valid, 3272 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:15:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17082 states. [2021-12-14 15:15:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17082 to 4910. [2021-12-14 15:15:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 1.5540843348950906) internal successors, (7629), 4909 states have internal predecessors, (7629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7629 transitions. [2021-12-14 15:15:19,908 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7629 transitions. Word has length 79 [2021-12-14 15:15:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:19,908 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 7629 transitions. [2021-12-14 15:15:19,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7629 transitions. [2021-12-14 15:15:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 15:15:19,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:19,909 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-14 15:15:19,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:15:19,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash -128135395, now seen corresponding path program 1 times [2021-12-14 15:15:19,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750719536] [2021-12-14 15:15:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:19,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:20,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750719536] [2021-12-14 15:15:20,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750719536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:20,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:20,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:15:20,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40766852] [2021-12-14 15:15:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 15:15:20,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 15:15:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:15:20,031 INFO L87 Difference]: Start difference. First operand 4910 states and 7629 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:21,109 INFO L93 Difference]: Finished difference Result 30106 states and 46547 transitions. [2021-12-14 15:15:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 15:15:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-14 15:15:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:21,164 INFO L225 Difference]: With dead ends: 30106 [2021-12-14 15:15:21,164 INFO L226 Difference]: Without dead ends: 25240 [2021-12-14 15:15:21,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:15:21,176 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1106 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:21,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 1755 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:15:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25240 states. [2021-12-14 15:15:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25240 to 25230. [2021-12-14 15:15:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25230 states, 25229 states have (on average 1.54159895358516) internal successors, (38893), 25229 states have internal predecessors, (38893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25230 states to 25230 states and 38893 transitions. [2021-12-14 15:15:22,386 INFO L78 Accepts]: Start accepts. Automaton has 25230 states and 38893 transitions. Word has length 80 [2021-12-14 15:15:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:22,386 INFO L470 AbstractCegarLoop]: Abstraction has 25230 states and 38893 transitions. [2021-12-14 15:15:22,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25230 states and 38893 transitions. [2021-12-14 15:15:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 15:15:22,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:22,388 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-14 15:15:22,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:15:22,389 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:22,390 INFO L85 PathProgramCache]: Analyzing trace with hash 750877787, now seen corresponding path program 1 times [2021-12-14 15:15:22,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:22,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736287088] [2021-12-14 15:15:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:22,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:22,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736287088] [2021-12-14 15:15:22,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736287088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:22,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:22,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:22,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846881650] [2021-12-14 15:15:22,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:22,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:22,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:22,436 INFO L87 Difference]: Start difference. First operand 25230 states and 38893 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:24,120 INFO L93 Difference]: Finished difference Result 69010 states and 105967 transitions. [2021-12-14 15:15:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:15:24,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-14 15:15:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:24,213 INFO L225 Difference]: With dead ends: 69010 [2021-12-14 15:15:24,213 INFO L226 Difference]: Without dead ends: 43824 [2021-12-14 15:15:24,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:24,250 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 173 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:24,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 560 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2021-12-14 15:15:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 43822. [2021-12-14 15:15:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43822 states, 43821 states have (on average 1.5228543392437417) internal successors, (66733), 43821 states have internal predecessors, (66733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43822 states to 43822 states and 66733 transitions. [2021-12-14 15:15:26,287 INFO L78 Accepts]: Start accepts. Automaton has 43822 states and 66733 transitions. Word has length 81 [2021-12-14 15:15:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:26,287 INFO L470 AbstractCegarLoop]: Abstraction has 43822 states and 66733 transitions. [2021-12-14 15:15:26,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 43822 states and 66733 transitions. [2021-12-14 15:15:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 15:15:26,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:26,288 INFO L514 BasicCegarLoop]: 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, 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, 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, 1] [2021-12-14 15:15:26,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:15:26,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:26,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1315274732, now seen corresponding path program 1 times [2021-12-14 15:15:26,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:26,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652874957] [2021-12-14 15:15:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:26,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:26,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652874957] [2021-12-14 15:15:26,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652874957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:26,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:26,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:15:26,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416251448] [2021-12-14 15:15:26,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:26,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:15:26,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:15:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:15:26,343 INFO L87 Difference]: Start difference. First operand 43822 states and 66733 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:30,280 INFO L93 Difference]: Finished difference Result 131378 states and 200111 transitions. [2021-12-14 15:15:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:15:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-14 15:15:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:30,460 INFO L225 Difference]: With dead ends: 131378 [2021-12-14 15:15:30,461 INFO L226 Difference]: Without dead ends: 87600 [2021-12-14 15:15:30,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:15:30,522 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1002 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:30,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 260 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:15:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87600 states. [2021-12-14 15:15:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87600 to 87598. [2021-12-14 15:15:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87598 states, 87597 states have (on average 1.5150861330867496) internal successors, (132717), 87597 states have internal predecessors, (132717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87598 states to 87598 states and 132717 transitions. [2021-12-14 15:15:35,139 INFO L78 Accepts]: Start accepts. Automaton has 87598 states and 132717 transitions. Word has length 82 [2021-12-14 15:15:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 87598 states and 132717 transitions. [2021-12-14 15:15:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87598 states and 132717 transitions. [2021-12-14 15:15:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 15:15:35,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:35,140 INFO L514 BasicCegarLoop]: 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, 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, 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, 1] [2021-12-14 15:15:35,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:15:35,141 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1885691313, now seen corresponding path program 1 times [2021-12-14 15:15:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:35,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985558104] [2021-12-14 15:15:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:35,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:35,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985558104] [2021-12-14 15:15:35,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985558104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:35,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:35,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:15:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570641852] [2021-12-14 15:15:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:35,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:15:35,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:15:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:15:35,226 INFO L87 Difference]: Start difference. First operand 87598 states and 132717 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:15:43,204 INFO L93 Difference]: Finished difference Result 178224 states and 268462 transitions. [2021-12-14 15:15:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:15:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-14 15:15:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:15:43,550 INFO L225 Difference]: With dead ends: 178224 [2021-12-14 15:15:43,550 INFO L226 Difference]: Without dead ends: 178222 [2021-12-14 15:15:43,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:15:43,601 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 364 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:15:43,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1143 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:15:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178222 states. [2021-12-14 15:15:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178222 to 90670. [2021-12-14 15:15:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90670 states, 90669 states have (on average 1.4976342520596897) internal successors, (135789), 90669 states have internal predecessors, (135789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90670 states to 90670 states and 135789 transitions. [2021-12-14 15:15:49,555 INFO L78 Accepts]: Start accepts. Automaton has 90670 states and 135789 transitions. Word has length 82 [2021-12-14 15:15:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:15:49,555 INFO L470 AbstractCegarLoop]: Abstraction has 90670 states and 135789 transitions. [2021-12-14 15:15:49,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:15:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90670 states and 135789 transitions. [2021-12-14 15:15:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-14 15:15:49,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:15:49,556 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1] [2021-12-14 15:15:49,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:15:49,557 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:15:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:15:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1683684575, now seen corresponding path program 1 times [2021-12-14 15:15:49,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:15:49,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595373213] [2021-12-14 15:15:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:15:49,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:15:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:15:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:15:49,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:15:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595373213] [2021-12-14 15:15:49,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595373213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:15:49,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:15:49,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:15:49,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005789463] [2021-12-14 15:15:49,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:15:49,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:15:49,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:15:49,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:15:49,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:15:49,589 INFO L87 Difference]: Start difference. First operand 90670 states and 135789 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)