./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/loop-invgen/heapsort.i -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 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 23:56:29,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:56:29,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:56:30,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:56:30,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:56:30,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:56:30,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:56:30,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:56:30,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:56:30,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:56:30,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:56:30,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:56:30,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:56:30,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:56:30,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:56:30,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:56:30,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:56:30,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:56:30,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:56:30,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:56:30,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:56:30,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:56:30,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:56:30,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:56:30,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:56:30,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:56:30,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:56:30,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:56:30,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:56:30,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:56:30,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:56:30,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:56:30,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:56:30,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:56:30,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:56:30,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:56:30,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:56:30,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:56:30,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:56:30,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:56:30,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:56:30,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:56:30,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:56:30,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:56:30,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:56:30,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:56:30,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:56:30,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:56:30,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:56:30,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:56:30,079 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:56:30,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:56:30,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:56:30,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:56:30,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:56:30,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:56:30,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:56:30,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:56:30,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:56:30,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:56:30,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:56:30,083 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:56:30,090 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2023-02-13 23:56:30,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:56:30,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:56:30,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:56:30,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:56:30,345 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:56:30,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/heapsort.i [2023-02-13 23:56:31,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:56:31,447 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:56:31,447 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i [2023-02-13 23:56:31,452 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7a8a5fc/143757dbfd1a47bd8a49fa2fdf946deb/FLAGf728d5222 [2023-02-13 23:56:31,474 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7a8a5fc/143757dbfd1a47bd8a49fa2fdf946deb [2023-02-13 23:56:31,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:56:31,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:56:31,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:56:31,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:56:31,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:56:31,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e45569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31, skipping insertion in model container [2023-02-13 23:56:31,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:56:31,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:56:31,614 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2023-02-13 23:56:31,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:56:31,630 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:56:31,638 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2023-02-13 23:56:31,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:56:31,650 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:56:31,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31 WrapperNode [2023-02-13 23:56:31,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:56:31,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:56:31,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:56:31,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:56:31,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,671 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-13 23:56:31,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:56:31,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:56:31,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:56:31,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:56:31,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:56:31,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:56:31,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:56:31,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:56:31,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (1/1) ... [2023-02-13 23:56:31,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:56:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:56:31,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-13 23:56:31,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-13 23:56:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:56:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:56:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:56:31,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:56:31,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 23:56:31,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 23:56:31,833 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:56:31,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:56:32,015 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:56:32,019 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:56:32,019 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 23:56:32,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:56:32 BoogieIcfgContainer [2023-02-13 23:56:32,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:56:32,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:56:32,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:56:32,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:56:32,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:56:31" (1/3) ... [2023-02-13 23:56:32,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:56:32, skipping insertion in model container [2023-02-13 23:56:32,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:56:31" (2/3) ... [2023-02-13 23:56:32,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:56:32, skipping insertion in model container [2023-02-13 23:56:32,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:56:32" (3/3) ... [2023-02-13 23:56:32,038 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2023-02-13 23:56:32,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:56:32,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:56:32,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:56:32,081 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44b714b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:56:32,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:56:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 23:56:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-13 23:56:32,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:32,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:32,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1754201352, now seen corresponding path program 1 times [2023-02-13 23:56:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:32,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534609162] [2023-02-13 23:56:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:32,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534609162] [2023-02-13 23:56:32,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534609162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:32,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:32,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:56:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028589138] [2023-02-13 23:56:32,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:32,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:56:32,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:56:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:56:32,295 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:32,396 INFO L93 Difference]: Finished difference Result 104 states and 193 transitions. [2023-02-13 23:56:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:56:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-13 23:56:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:32,404 INFO L225 Difference]: With dead ends: 104 [2023-02-13 23:56:32,404 INFO L226 Difference]: Without dead ends: 61 [2023-02-13 23:56:32,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:32,408 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-13 23:56:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2023-02-13 23:56:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 23:56:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2023-02-13 23:56:32,450 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2023-02-13 23:56:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:32,451 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2023-02-13 23:56:32,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2023-02-13 23:56:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-13 23:56:32,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:32,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:56:32,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:32,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1749464583, now seen corresponding path program 1 times [2023-02-13 23:56:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:32,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352436752] [2023-02-13 23:56:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:32,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:32,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352436752] [2023-02-13 23:56:32,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352436752] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:32,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:32,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:56:32,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770337608] [2023-02-13 23:56:32,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:32,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:56:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:56:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:56:32,547 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:32,617 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2023-02-13 23:56:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:56:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-13 23:56:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:32,618 INFO L225 Difference]: With dead ends: 46 [2023-02-13 23:56:32,619 INFO L226 Difference]: Without dead ends: 44 [2023-02-13 23:56:32,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:32,620 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:32,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 137 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-13 23:56:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-13 23:56:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 23:56:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2023-02-13 23:56:32,627 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 11 [2023-02-13 23:56:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2023-02-13 23:56:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2023-02-13 23:56:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-13 23:56:32,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:32,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 23:56:32,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1728015063, now seen corresponding path program 1 times [2023-02-13 23:56:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:32,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629672016] [2023-02-13 23:56:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:32,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629672016] [2023-02-13 23:56:32,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629672016] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:32,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:32,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:56:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683990213] [2023-02-13 23:56:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:56:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:56:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:32,694 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:32,861 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2023-02-13 23:56:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-13 23:56:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:32,862 INFO L225 Difference]: With dead ends: 76 [2023-02-13 23:56:32,862 INFO L226 Difference]: Without dead ends: 74 [2023-02-13 23:56:32,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:56:32,863 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 33 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:32,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 184 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-13 23:56:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2023-02-13 23:56:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-13 23:56:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2023-02-13 23:56:32,878 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 11 [2023-02-13 23:56:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:32,878 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2023-02-13 23:56:32,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2023-02-13 23:56:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:56:32,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:32,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:32,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 23:56:32,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1885075524, now seen corresponding path program 1 times [2023-02-13 23:56:32,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:32,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98264923] [2023-02-13 23:56:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:32,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:32,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98264923] [2023-02-13 23:56:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98264923] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:32,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898134129] [2023-02-13 23:56:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:32,975 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,102 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2023-02-13 23:56:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-13 23:56:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,104 INFO L225 Difference]: With dead ends: 102 [2023-02-13 23:56:33,104 INFO L226 Difference]: Without dead ends: 100 [2023-02-13 23:56:33,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-13 23:56:33,105 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-13 23:56:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2023-02-13 23:56:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 40 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-13 23:56:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 148 transitions. [2023-02-13 23:56:33,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 148 transitions. Word has length 16 [2023-02-13 23:56:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,121 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 148 transitions. [2023-02-13 23:56:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 148 transitions. [2023-02-13 23:56:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:56:33,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,122 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 23:56:33,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1503713061, now seen corresponding path program 1 times [2023-02-13 23:56:33,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815189132] [2023-02-13 23:56:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:33,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815189132] [2023-02-13 23:56:33,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815189132] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:56:33,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638664781] [2023-02-13 23:56:33,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:56:33,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:56:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:56:33,166 INFO L87 Difference]: Start difference. First operand 97 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,210 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2023-02-13 23:56:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:56:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-13 23:56:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,212 INFO L225 Difference]: With dead ends: 103 [2023-02-13 23:56:33,212 INFO L226 Difference]: Without dead ends: 101 [2023-02-13 23:56:33,213 INFO L412 NwaCegarLoop]: 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 [2023-02-13 23:56:33,214 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:56:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-13 23:56:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-13 23:56:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 55 states have internal predecessors, (71), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-13 23:56:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2023-02-13 23:56:33,228 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 16 [2023-02-13 23:56:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,228 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2023-02-13 23:56:33,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2023-02-13 23:56:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:56:33,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,229 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-13 23:56:33,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1518715221, now seen corresponding path program 1 times [2023-02-13 23:56:33,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089980622] [2023-02-13 23:56:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089980622] [2023-02-13 23:56:33,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089980622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449539318] [2023-02-13 23:56:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:33,317 INFO L87 Difference]: Start difference. First operand 101 states and 151 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,472 INFO L93 Difference]: Finished difference Result 155 states and 240 transitions. [2023-02-13 23:56:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-13 23:56:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,474 INFO L225 Difference]: With dead ends: 155 [2023-02-13 23:56:33,475 INFO L226 Difference]: Without dead ends: 153 [2023-02-13 23:56:33,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-13 23:56:33,476 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 60 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 245 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-13 23:56:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2023-02-13 23:56:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 72 states have internal predecessors, (94), 60 states have call successors, (60), 7 states have call predecessors, (60), 7 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2023-02-13 23:56:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 214 transitions. [2023-02-13 23:56:33,494 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 214 transitions. Word has length 16 [2023-02-13 23:56:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,494 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 214 transitions. [2023-02-13 23:56:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 214 transitions. [2023-02-13 23:56:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:56:33,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,495 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 23:56:33,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1823085758, now seen corresponding path program 1 times [2023-02-13 23:56:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412024734] [2023-02-13 23:56:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:33,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412024734] [2023-02-13 23:56:33,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412024734] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:56:33,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614790591] [2023-02-13 23:56:33,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:56:33,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:56:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:56:33,517 INFO L87 Difference]: Start difference. First operand 137 states and 214 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,544 INFO L93 Difference]: Finished difference Result 274 states and 436 transitions. [2023-02-13 23:56:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:56:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-13 23:56:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,545 INFO L225 Difference]: With dead ends: 274 [2023-02-13 23:56:33,546 INFO L226 Difference]: Without dead ends: 205 [2023-02-13 23:56:33,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:56:33,547 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 115 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:56:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-13 23:56:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-02-13 23:56:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 99 states have (on average 1.404040404040404) internal successors, (139), 103 states have internal predecessors, (139), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2023-02-13 23:56:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2023-02-13 23:56:33,572 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 16 [2023-02-13 23:56:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,572 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2023-02-13 23:56:33,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2023-02-13 23:56:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:56:33,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,573 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-13 23:56:33,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2105521235, now seen corresponding path program 1 times [2023-02-13 23:56:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12383286] [2023-02-13 23:56:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:56:33,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12383286] [2023-02-13 23:56:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12383286] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:56:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758870913] [2023-02-13 23:56:33,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:56:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:56:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:56:33,617 INFO L87 Difference]: Start difference. First operand 205 states and 335 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,674 INFO L93 Difference]: Finished difference Result 230 states and 359 transitions. [2023-02-13 23:56:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 23:56:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-13 23:56:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,675 INFO L225 Difference]: With dead ends: 230 [2023-02-13 23:56:33,675 INFO L226 Difference]: Without dead ends: 183 [2023-02-13 23:56:33,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:33,676 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:56:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-13 23:56:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-02-13 23:56:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 93 states have internal predecessors, (124), 86 states have call successors, (86), 7 states have call predecessors, (86), 7 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2023-02-13 23:56:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 296 transitions. [2023-02-13 23:56:33,698 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 296 transitions. Word has length 16 [2023-02-13 23:56:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,698 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 296 transitions. [2023-02-13 23:56:33,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 23:56:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 296 transitions. [2023-02-13 23:56:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 23:56:33,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-13 23:56:33,699 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 186914675, now seen corresponding path program 1 times [2023-02-13 23:56:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521642871] [2023-02-13 23:56:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:56:33,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521642871] [2023-02-13 23:56:33,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521642871] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:56:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161350162] [2023-02-13 23:56:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:56:33,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:56:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:33,744 INFO L87 Difference]: Start difference. First operand 183 states and 296 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 23:56:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:33,825 INFO L93 Difference]: Finished difference Result 217 states and 348 transitions. [2023-02-13 23:56:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-02-13 23:56:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:33,827 INFO L225 Difference]: With dead ends: 217 [2023-02-13 23:56:33,827 INFO L226 Difference]: Without dead ends: 215 [2023-02-13 23:56:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:56:33,828 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 44 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:33,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 293 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-13 23:56:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2023-02-13 23:56:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 102 states have internal predecessors, (133), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-13 23:56:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 317 transitions. [2023-02-13 23:56:33,847 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 317 transitions. Word has length 23 [2023-02-13 23:56:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:33,848 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 317 transitions. [2023-02-13 23:56:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 23:56:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 317 transitions. [2023-02-13 23:56:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 23:56:33,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:33,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:33,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-13 23:56:33,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash 768784003, now seen corresponding path program 1 times [2023-02-13 23:56:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:33,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845762288] [2023-02-13 23:56:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:56:33,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:33,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845762288] [2023-02-13 23:56:33,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845762288] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:33,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:33,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:56:33,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628367009] [2023-02-13 23:56:33,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:33,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:56:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:56:33,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:56:33,887 INFO L87 Difference]: Start difference. First operand 197 states and 317 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 23:56:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:34,065 INFO L93 Difference]: Finished difference Result 520 states and 854 transitions. [2023-02-13 23:56:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 23:56:34,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-13 23:56:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:34,067 INFO L225 Difference]: With dead ends: 520 [2023-02-13 23:56:34,067 INFO L226 Difference]: Without dead ends: 366 [2023-02-13 23:56:34,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:34,068 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 83 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:34,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-02-13 23:56:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 197. [2023-02-13 23:56:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 102 states have internal predecessors, (131), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-13 23:56:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 315 transitions. [2023-02-13 23:56:34,094 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 315 transitions. Word has length 25 [2023-02-13 23:56:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:34,094 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 315 transitions. [2023-02-13 23:56:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 23:56:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 315 transitions. [2023-02-13 23:56:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-13 23:56:34,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:34,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-13 23:56:34,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash -299150037, now seen corresponding path program 1 times [2023-02-13 23:56:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265405290] [2023-02-13 23:56:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-13 23:56:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 23:56:34,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265405290] [2023-02-13 23:56:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265405290] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:34,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:56:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692155029] [2023-02-13 23:56:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:56:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:56:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:56:34,168 INFO L87 Difference]: Start difference. First operand 197 states and 315 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 23:56:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:34,320 INFO L93 Difference]: Finished difference Result 291 states and 471 transitions. [2023-02-13 23:56:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 23:56:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-02-13 23:56:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:34,323 INFO L225 Difference]: With dead ends: 291 [2023-02-13 23:56:34,323 INFO L226 Difference]: Without dead ends: 289 [2023-02-13 23:56:34,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:56:34,324 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:34,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-13 23:56:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2023-02-13 23:56:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 132 states have internal predecessors, (161), 140 states have call successors, (140), 10 states have call predecessors, (140), 10 states have return successors, (140), 126 states have call predecessors, (140), 140 states have call successors, (140) [2023-02-13 23:56:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 441 transitions. [2023-02-13 23:56:34,357 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 441 transitions. Word has length 26 [2023-02-13 23:56:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:34,358 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 441 transitions. [2023-02-13 23:56:34,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 23:56:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 441 transitions. [2023-02-13 23:56:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-13 23:56:34,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:34,359 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:34,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-13 23:56:34,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1714235681, now seen corresponding path program 1 times [2023-02-13 23:56:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204076191] [2023-02-13 23:56:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-13 23:56:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 23:56:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204076191] [2023-02-13 23:56:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204076191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:34,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:34,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267502696] [2023-02-13 23:56:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:34,441 INFO L87 Difference]: Start difference. First operand 269 states and 441 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 23:56:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:34,589 INFO L93 Difference]: Finished difference Result 317 states and 516 transitions. [2023-02-13 23:56:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-13 23:56:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:34,591 INFO L225 Difference]: With dead ends: 317 [2023-02-13 23:56:34,591 INFO L226 Difference]: Without dead ends: 315 [2023-02-13 23:56:34,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:56:34,591 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:34,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 197 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-02-13 23:56:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 287. [2023-02-13 23:56:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 125 states have (on average 1.36) internal successors, (170), 141 states have internal predecessors, (170), 150 states have call successors, (150), 11 states have call predecessors, (150), 11 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2023-02-13 23:56:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 470 transitions. [2023-02-13 23:56:34,692 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 470 transitions. Word has length 28 [2023-02-13 23:56:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:34,692 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 470 transitions. [2023-02-13 23:56:34,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 23:56:34,692 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 470 transitions. [2023-02-13 23:56:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 23:56:34,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:34,709 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:34,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-13 23:56:34,709 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash 523331784, now seen corresponding path program 1 times [2023-02-13 23:56:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:34,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299556363] [2023-02-13 23:56:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-13 23:56:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:56:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 23:56:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-13 23:56:34,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299556363] [2023-02-13 23:56:34,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299556363] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:34,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:34,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:34,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490781268] [2023-02-13 23:56:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:34,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:34,768 INFO L87 Difference]: Start difference. First operand 287 states and 470 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 23:56:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:34,932 INFO L93 Difference]: Finished difference Result 329 states and 527 transitions. [2023-02-13 23:56:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-13 23:56:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:34,934 INFO L225 Difference]: With dead ends: 329 [2023-02-13 23:56:34,934 INFO L226 Difference]: Without dead ends: 327 [2023-02-13 23:56:34,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:56:34,935 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:34,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-13 23:56:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2023-02-13 23:56:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 128 states have (on average 1.3515625) internal successors, (173), 144 states have internal predecessors, (173), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2023-02-13 23:56:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 473 transitions. [2023-02-13 23:56:35,012 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 473 transitions. Word has length 38 [2023-02-13 23:56:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:35,013 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 473 transitions. [2023-02-13 23:56:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-13 23:56:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 473 transitions. [2023-02-13 23:56:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 23:56:35,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:35,014 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:35,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-13 23:56:35,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1856149802, now seen corresponding path program 1 times [2023-02-13 23:56:35,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371745768] [2023-02-13 23:56:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:35,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:56:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-13 23:56:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 23:56:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:35,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371745768] [2023-02-13 23:56:35,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371745768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:35,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:35,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822754216] [2023-02-13 23:56:35,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:35,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:35,063 INFO L87 Difference]: Start difference. First operand 291 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 23:56:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:35,175 INFO L93 Difference]: Finished difference Result 297 states and 478 transitions. [2023-02-13 23:56:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:56:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-02-13 23:56:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:35,177 INFO L225 Difference]: With dead ends: 297 [2023-02-13 23:56:35,177 INFO L226 Difference]: Without dead ends: 295 [2023-02-13 23:56:35,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:56:35,178 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:35,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 103 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-02-13 23:56:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-02-13 23:56:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 131 states have (on average 1.3435114503816794) internal successors, (176), 147 states have internal predecessors, (176), 150 states have call successors, (150), 13 states have call predecessors, (150), 13 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2023-02-13 23:56:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 476 transitions. [2023-02-13 23:56:35,214 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 476 transitions. Word has length 38 [2023-02-13 23:56:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:35,214 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 476 transitions. [2023-02-13 23:56:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 23:56:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 476 transitions. [2023-02-13 23:56:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 23:56:35,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:35,215 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:35,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-13 23:56:35,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2019762676, now seen corresponding path program 1 times [2023-02-13 23:56:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:35,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771006300] [2023-02-13 23:56:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:56:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-13 23:56:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 23:56:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-13 23:56:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-13 23:56:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:35,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771006300] [2023-02-13 23:56:35,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771006300] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:35,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:56:35,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:56:35,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606865023] [2023-02-13 23:56:35,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:56:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:56:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:56:35,274 INFO L87 Difference]: Start difference. First operand 295 states and 476 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-13 23:56:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:35,389 INFO L93 Difference]: Finished difference Result 329 states and 525 transitions. [2023-02-13 23:56:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:56:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2023-02-13 23:56:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:35,392 INFO L225 Difference]: With dead ends: 329 [2023-02-13 23:56:35,392 INFO L226 Difference]: Without dead ends: 327 [2023-02-13 23:56:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:56:35,392 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 41 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:35,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 226 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-13 23:56:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 174. [2023-02-13 23:56:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 76 states have call successors, (76), 12 states have call predecessors, (76), 12 states have return successors, (76), 68 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-13 23:56:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 260 transitions. [2023-02-13 23:56:35,415 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 260 transitions. Word has length 50 [2023-02-13 23:56:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:35,416 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 260 transitions. [2023-02-13 23:56:35,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-13 23:56:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 260 transitions. [2023-02-13 23:56:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-13 23:56:35,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:35,417 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:35,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-13 23:56:35,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:35,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2077570128, now seen corresponding path program 1 times [2023-02-13 23:56:35,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:35,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534667532] [2023-02-13 23:56:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:35,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-13 23:56:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-13 23:56:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 23:56:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 23:56:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-13 23:56:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-02-13 23:56:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-13 23:56:35,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:35,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534667532] [2023-02-13 23:56:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534667532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:56:35,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078069923] [2023-02-13 23:56:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:35,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:56:35,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:56:35,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:56:35,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:56:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 23:56:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:56:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-13 23:56:35,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 23:56:35,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078069923] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:56:35,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 23:56:35,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-02-13 23:56:35,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010030311] [2023-02-13 23:56:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:56:35,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:56:35,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:56:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-13 23:56:35,611 INFO L87 Difference]: Start difference. First operand 174 states and 260 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-13 23:56:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:35,798 INFO L93 Difference]: Finished difference Result 505 states and 801 transitions. [2023-02-13 23:56:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:56:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2023-02-13 23:56:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:35,800 INFO L225 Difference]: With dead ends: 505 [2023-02-13 23:56:35,800 INFO L226 Difference]: Without dead ends: 335 [2023-02-13 23:56:35,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-13 23:56:35,801 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:35,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 168 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-02-13 23:56:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2023-02-13 23:56:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 152 states have internal predecessors, (183), 162 states have call successors, (162), 12 states have call predecessors, (162), 12 states have return successors, (162), 146 states have call predecessors, (162), 162 states have call successors, (162) [2023-02-13 23:56:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 507 transitions. [2023-02-13 23:56:35,844 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 507 transitions. Word has length 58 [2023-02-13 23:56:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:35,844 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 507 transitions. [2023-02-13 23:56:35,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-13 23:56:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 507 transitions. [2023-02-13 23:56:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-13 23:56:35,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:35,846 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:35,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 23:56:36,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-13 23:56:36,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1244619342, now seen corresponding path program 1 times [2023-02-13 23:56:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:36,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729652887] [2023-02-13 23:56:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-13 23:56:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:56:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 23:56:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 23:56:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-13 23:56:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-13 23:56:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-13 23:56:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-13 23:56:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-13 23:56:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-13 23:56:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-13 23:56:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:36,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729652887] [2023-02-13 23:56:36,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729652887] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:56:36,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606534914] [2023-02-13 23:56:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:36,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:56:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:56:36,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:56:36,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:56:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-13 23:56:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:56:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-13 23:56:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:56:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-13 23:56:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606534914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:56:36,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:56:36,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-02-13 23:56:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518711053] [2023-02-13 23:56:36,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:56:36,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 23:56:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 23:56:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-02-13 23:56:36,318 INFO L87 Difference]: Start difference. First operand 311 states and 507 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2023-02-13 23:56:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:37,385 INFO L93 Difference]: Finished difference Result 671 states and 1116 transitions. [2023-02-13 23:56:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-13 23:56:37,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 80 [2023-02-13 23:56:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:37,389 INFO L225 Difference]: With dead ends: 671 [2023-02-13 23:56:37,389 INFO L226 Difference]: Without dead ends: 669 [2023-02-13 23:56:37,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2023-02-13 23:56:37,390 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 275 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:37,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 624 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 23:56:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-02-13 23:56:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 367. [2023-02-13 23:56:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 163 states have (on average 1.3496932515337423) internal successors, (220), 181 states have internal predecessors, (220), 188 states have call successors, (188), 15 states have call predecessors, (188), 15 states have return successors, (188), 170 states have call predecessors, (188), 188 states have call successors, (188) [2023-02-13 23:56:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 596 transitions. [2023-02-13 23:56:37,451 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 596 transitions. Word has length 80 [2023-02-13 23:56:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:37,451 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 596 transitions. [2023-02-13 23:56:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2023-02-13 23:56:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 596 transitions. [2023-02-13 23:56:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-13 23:56:37,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:37,452 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:37,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 23:56:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-13 23:56:37,658 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1679445438, now seen corresponding path program 2 times [2023-02-13 23:56:37,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:37,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606351269] [2023-02-13 23:56:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-13 23:56:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:56:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 23:56:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 23:56:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-13 23:56:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-13 23:56:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-13 23:56:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-13 23:56:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-02-13 23:56:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-13 23:56:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-13 23:56:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-13 23:56:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606351269] [2023-02-13 23:56:37,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606351269] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:56:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813966764] [2023-02-13 23:56:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 23:56:37,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:56:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:56:37,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:56:37,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:56:37,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 23:56:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:56:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-13 23:56:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:56:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-13 23:56:38,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:56:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-13 23:56:38,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813966764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:56:38,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:56:38,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-02-13 23:56:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265571888] [2023-02-13 23:56:38,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:56:38,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 23:56:38,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 23:56:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-13 23:56:38,125 INFO L87 Difference]: Start difference. First operand 367 states and 596 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) [2023-02-13 23:56:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:38,442 INFO L93 Difference]: Finished difference Result 399 states and 639 transitions. [2023-02-13 23:56:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 23:56:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) Word has length 85 [2023-02-13 23:56:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:38,444 INFO L225 Difference]: With dead ends: 399 [2023-02-13 23:56:38,444 INFO L226 Difference]: Without dead ends: 317 [2023-02-13 23:56:38,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2023-02-13 23:56:38,445 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 148 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:56:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-02-13 23:56:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 301. [2023-02-13 23:56:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 154 states have internal predecessors, (184), 144 states have call successors, (144), 16 states have call predecessors, (144), 16 states have return successors, (144), 130 states have call predecessors, (144), 144 states have call successors, (144) [2023-02-13 23:56:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 472 transitions. [2023-02-13 23:56:38,512 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 472 transitions. Word has length 85 [2023-02-13 23:56:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:38,513 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 472 transitions. [2023-02-13 23:56:38,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (42), 3 states have call predecessors, (42), 1 states have return successors, (39), 6 states have call predecessors, (39), 6 states have call successors, (39) [2023-02-13 23:56:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 472 transitions. [2023-02-13 23:56:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-13 23:56:38,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:56:38,514 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:56:38,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 23:56:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-13 23:56:38,719 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:56:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:56:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 520521549, now seen corresponding path program 1 times [2023-02-13 23:56:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:56:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830247528] [2023-02-13 23:56:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:56:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 23:56:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-13 23:56:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:56:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-13 23:56:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 23:56:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-13 23:56:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-13 23:56:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-02-13 23:56:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-13 23:56:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-02-13 23:56:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-13 23:56:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-02-13 23:56:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-13 23:56:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-13 23:56:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-13 23:56:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-13 23:56:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-02-13 23:56:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-13 23:56:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2023-02-13 23:56:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-02-13 23:56:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-02-13 23:56:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:56:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830247528] [2023-02-13 23:56:38,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830247528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:56:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516595838] [2023-02-13 23:56:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:56:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:56:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:56:38,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:56:38,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:56:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:56:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-13 23:56:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:56:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 382 proven. 8 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-13 23:56:39,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:56:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2023-02-13 23:56:39,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516595838] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:56:39,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:56:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-13 23:56:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958655307] [2023-02-13 23:56:39,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:56:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-13 23:56:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:56:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-13 23:56:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-13 23:56:39,214 INFO L87 Difference]: Start difference. First operand 301 states and 472 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 11 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-13 23:56:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:56:41,766 INFO L93 Difference]: Finished difference Result 894 states and 1429 transitions. [2023-02-13 23:56:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-13 23:56:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 11 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) Word has length 129 [2023-02-13 23:56:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:56:41,767 INFO L225 Difference]: With dead ends: 894 [2023-02-13 23:56:41,767 INFO L226 Difference]: Without dead ends: 0 [2023-02-13 23:56:41,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1180, Invalid=4370, Unknown=0, NotChecked=0, Total=5550 [2023-02-13 23:56:41,770 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 349 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 3833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-13 23:56:41,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 845 Invalid, 3833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-13 23:56:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-13 23:56:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-13 23:56:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:56:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-13 23:56:41,771 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 129 [2023-02-13 23:56:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:56:41,771 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-13 23:56:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 11 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (60), 11 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-13 23:56:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-13 23:56:41,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-13 23:56:41,777 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-13 23:56:41,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 23:56:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:56:41,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-13 23:57:10,327 WARN L233 SmtUtils]: Spent 26.58s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-02-13 23:57:35,514 WARN L233 SmtUtils]: Spent 25.17s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-02-13 23:58:02,615 WARN L233 SmtUtils]: Spent 26.51s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-02-13 23:58:28,101 WARN L233 SmtUtils]: Spent 25.37s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)