./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/loops-crafted-1/in-de62.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:11:47,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:11:47,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:11:47,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:11:47,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:11:47,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:11:47,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:11:47,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:11:47,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:11:47,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:11:47,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:11:47,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:11:47,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:11:47,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:11:47,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:11:47,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:11:47,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:11:47,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:11:47,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:11:47,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:11:47,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:11:47,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:11:47,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:11:47,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:11:47,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:11:47,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:11:47,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:11:47,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:11:47,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:11:47,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:11:47,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:11:47,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:11:47,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:11:47,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:11:47,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:11:47,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:11:47,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:11:47,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:11:47,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:11:47,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:11:47,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:11:47,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:11:47,404 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:11:47,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:11:47,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:11:47,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:11:47,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:11:47,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:11:47,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:11:47,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:11:47,406 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:11:47,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:11:47,407 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:11:47,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:11:47,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:11:47,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:11:47,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:11:47,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:11:47,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:11:47,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:11:47,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:11:47,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:11:47,410 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:11:47,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:11:47,410 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:11:47,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2023-02-15 20:11:47,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:11:47,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:11:47,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:11:47,640 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:11:47,640 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:11:47,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-15 20:11:48,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:11:48,609 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:11:48,609 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-15 20:11:48,612 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97a05574/5af56654fe61418e8127cfffac3ba24c/FLAG635aaecff [2023-02-15 20:11:48,624 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97a05574/5af56654fe61418e8127cfffac3ba24c [2023-02-15 20:11:48,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:11:48,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:11:48,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:11:48,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:11:48,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:11:48,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ced64a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48, skipping insertion in model container [2023-02-15 20:11:48,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:11:48,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:11:48,772 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/loops-crafted-1/in-de62.c[368,381] [2023-02-15 20:11:48,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:11:48,793 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:11:48,801 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/loops-crafted-1/in-de62.c[368,381] [2023-02-15 20:11:48,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:11:48,822 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:11:48,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48 WrapperNode [2023-02-15 20:11:48,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:11:48,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:11:48,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:11:48,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:11:48,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,841 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-15 20:11:48,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:11:48,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:11:48,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:11:48,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:11:48,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:11:48,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:11:48,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:11:48,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:11:48,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (1/1) ... [2023-02-15 20:11:48,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:11:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:48,883 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) [2023-02-15 20:11:48,890 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 [2023-02-15 20:11:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:11:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:11:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:11:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:11:48,953 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:11:48,954 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:11:49,060 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:11:49,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:11:49,063 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-15 20:11:49,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:11:49 BoogieIcfgContainer [2023-02-15 20:11:49,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:11:49,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:11:49,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:11:49,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:11:49,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:11:48" (1/3) ... [2023-02-15 20:11:49,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599db8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:11:49, skipping insertion in model container [2023-02-15 20:11:49,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:11:48" (2/3) ... [2023-02-15 20:11:49,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599db8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:11:49, skipping insertion in model container [2023-02-15 20:11:49,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:11:49" (3/3) ... [2023-02-15 20:11:49,069 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-02-15 20:11:49,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:11:49,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:11:49,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:11:49,131 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;@4bbeedfc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:11:49,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:11:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 20:11:49,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-15 20:11:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124371667] [2023-02-15 20:11:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:49,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124371667] [2023-02-15 20:11:49,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124371667] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:11:49,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:11:49,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:11:49,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348456329] [2023-02-15 20:11:49,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:11:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:11:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:11:49,313 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,324 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-15 20:11:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:11:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 20:11:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,329 INFO L225 Difference]: With dead ends: 31 [2023-02-15 20:11:49,329 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 20:11:49,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:11:49,333 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 20:11:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 20:11:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-15 20:11:49,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-15 20:11:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,351 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-15 20:11:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-15 20:11:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 20:11:49,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:11:49,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-15 20:11:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176971038] [2023-02-15 20:11:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:49,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176971038] [2023-02-15 20:11:49,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176971038] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:11:49,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:11:49,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:11:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068159812] [2023-02-15 20:11:49,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:11:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:11:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:11:49,467 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,500 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-02-15 20:11:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:11:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 20:11:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,501 INFO L225 Difference]: With dead ends: 27 [2023-02-15 20:11:49,501 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 20:11:49,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:11:49,502 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 20:11:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-15 20:11:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-15 20:11:49,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2023-02-15 20:11:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,507 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-15 20:11:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-15 20:11:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 20:11:49,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 20:11:49,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2023-02-15 20:11:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471572000] [2023-02-15 20:11:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:49,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471572000] [2023-02-15 20:11:49,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471572000] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:11:49,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:11:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:11:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997249337] [2023-02-15 20:11:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:11:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:11:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:11:49,537 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,559 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-02-15 20:11:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:11:49,559 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 20:11:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,560 INFO L225 Difference]: With dead ends: 41 [2023-02-15 20:11:49,560 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:11:49,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:11:49,561 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:11:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 20:11:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-02-15 20:11:49,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2023-02-15 20:11:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,570 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-02-15 20:11:49,571 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-02-15 20:11:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 20:11:49,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 20:11:49,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2023-02-15 20:11:49,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578564857] [2023-02-15 20:11:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:49,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578564857] [2023-02-15 20:11:49,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578564857] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:11:49,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:11:49,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:11:49,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22528856] [2023-02-15 20:11:49,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:11:49,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:11:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:11:49,617 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,638 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-15 20:11:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:11:49,638 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 20:11:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,639 INFO L225 Difference]: With dead ends: 43 [2023-02-15 20:11:49,639 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 20:11:49,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:11:49,640 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 20:11:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 20:11:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-02-15 20:11:49,651 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2023-02-15 20:11:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,651 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-02-15 20:11:49,651 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-02-15 20:11:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 20:11:49,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 20:11:49,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2023-02-15 20:11:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263900939] [2023-02-15 20:11:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263900939] [2023-02-15 20:11:49,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263900939] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:11:49,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:11:49,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:11:49,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795837891] [2023-02-15 20:11:49,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:11:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:11:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:11:49,708 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,734 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-02-15 20:11:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:11:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 20:11:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,735 INFO L225 Difference]: With dead ends: 41 [2023-02-15 20:11:49,735 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:11:49,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:11:49,736 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:11:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-15 20:11:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2023-02-15 20:11:49,743 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2023-02-15 20:11:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,744 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2023-02-15 20:11:49,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2023-02-15 20:11:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 20:11:49,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 20:11:49,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2023-02-15 20:11:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189994579] [2023-02-15 20:11:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189994579] [2023-02-15 20:11:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189994579] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83267685] [2023-02-15 20:11:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:49,817 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) [2023-02-15 20:11:49,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:11:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:49,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 20:11:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:49,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83267685] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:49,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:11:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-15 20:11:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40265892] [2023-02-15 20:11:49,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:11:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:11:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:11:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:11:49,916 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:49,958 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-15 20:11:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:11:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 20:11:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:49,958 INFO L225 Difference]: With dead ends: 35 [2023-02-15 20:11:49,959 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 20:11:49,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:11:49,960 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:49,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 20:11:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-15 20:11:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-02-15 20:11:49,964 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2023-02-15 20:11:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:49,964 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-02-15 20:11:49,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-02-15 20:11:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 20:11:49,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:49,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:49,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:50,174 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,SelfDestructingSolverStorable5 [2023-02-15 20:11:50,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2023-02-15 20:11:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244627720] [2023-02-15 20:11:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 20:11:50,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:50,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244627720] [2023-02-15 20:11:50,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244627720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:50,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747205731] [2023-02-15 20:11:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:50,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:50,267 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) [2023-02-15 20:11:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:11:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:11:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:50,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:11:50,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747205731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:50,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:50,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2023-02-15 20:11:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629263922] [2023-02-15 20:11:50,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:11:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:11:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:11:50,391 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:50,532 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2023-02-15 20:11:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:11:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 20:11:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:50,534 INFO L225 Difference]: With dead ends: 103 [2023-02-15 20:11:50,534 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 20:11:50,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:11:50,535 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:50,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:11:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 20:11:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2023-02-15 20:11:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2023-02-15 20:11:50,544 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2023-02-15 20:11:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:50,544 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2023-02-15 20:11:50,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2023-02-15 20:11:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 20:11:50,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:50,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:50,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:50,749 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,SelfDestructingSolverStorable6 [2023-02-15 20:11:50,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2023-02-15 20:11:50,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:50,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241869054] [2023-02-15 20:11:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:50,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241869054] [2023-02-15 20:11:50,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241869054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990166384] [2023-02-15 20:11:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:50,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:50,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:50,831 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) [2023-02-15 20:11:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:11:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 20:11:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:50,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:50,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990166384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:50,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:50,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-15 20:11:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982810003] [2023-02-15 20:11:50,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:50,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:11:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:11:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:11:50,932 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:50,990 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2023-02-15 20:11:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:11:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 20:11:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:50,993 INFO L225 Difference]: With dead ends: 101 [2023-02-15 20:11:50,993 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 20:11:50,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:11:50,997 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:50,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 20:11:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-15 20:11:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-02-15 20:11:51,015 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-02-15 20:11:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:51,015 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-02-15 20:11:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-02-15 20:11:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 20:11:51,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:51,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:51,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:51,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:51,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2023-02-15 20:11:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:51,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266147629] [2023-02-15 20:11:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:51,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266147629] [2023-02-15 20:11:51,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266147629] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:51,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562466905] [2023-02-15 20:11:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:51,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:51,288 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) [2023-02-15 20:11:51,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:11:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:11:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:11:51,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 20:11:51,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562466905] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:51,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:51,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-02-15 20:11:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642373125] [2023-02-15 20:11:51,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:11:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:11:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:11:51,473 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:51,621 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2023-02-15 20:11:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 20:11:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 20:11:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:51,623 INFO L225 Difference]: With dead ends: 141 [2023-02-15 20:11:51,623 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 20:11:51,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:11:51,625 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:51,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 72 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:11:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 20:11:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2023-02-15 20:11:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2023-02-15 20:11:51,656 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2023-02-15 20:11:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:51,656 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2023-02-15 20:11:51,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2023-02-15 20:11:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 20:11:51,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:51,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:51,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:51,862 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-15 20:11:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:51,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243583816] [2023-02-15 20:11:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:51,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243583816] [2023-02-15 20:11:51,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243583816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:51,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426374278] [2023-02-15 20:11:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:51,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:51,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:51,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:11:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:11:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:52,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:11:52,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426374278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:52,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:52,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-15 20:11:52,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105073179] [2023-02-15 20:11:52,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:52,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 20:11:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 20:11:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 20:11:52,094 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:52,147 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2023-02-15 20:11:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:11:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 20:11:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:52,148 INFO L225 Difference]: With dead ends: 143 [2023-02-15 20:11:52,148 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 20:11:52,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:11:52,149 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:52,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:11:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 20:11:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-02-15 20:11:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-02-15 20:11:52,174 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2023-02-15 20:11:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:52,174 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-02-15 20:11:52,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-02-15 20:11:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:11:52,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:52,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:52,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:11:52,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2023-02-15 20:11:52,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142856166] [2023-02-15 20:11:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:52,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:11:52,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142856166] [2023-02-15 20:11:52,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142856166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:52,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617058458] [2023-02-15 20:11:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:11:52,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:52,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:52,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:52,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:11:52,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:11:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:11:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:11:52,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:11:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617058458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:52,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-15 20:11:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981818586] [2023-02-15 20:11:52,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:52,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:11:52,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:11:52,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:11:52,565 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:52,709 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2023-02-15 20:11:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 20:11:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 20:11:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:52,710 INFO L225 Difference]: With dead ends: 138 [2023-02-15 20:11:52,710 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 20:11:52,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:11:52,711 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:52,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 73 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:11:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 20:11:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2023-02-15 20:11:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-02-15 20:11:52,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2023-02-15 20:11:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:52,747 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-02-15 20:11:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-02-15 20:11:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 20:11:52,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:52,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:52,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:52,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:52,952 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2023-02-15 20:11:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213073871] [2023-02-15 20:11:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213073871] [2023-02-15 20:11:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213073871] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486425760] [2023-02-15 20:11:53,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:11:53,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:53,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:53,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:11:53,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:11:53,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:11:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:11:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:11:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486425760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:53,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-15 20:11:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524608695] [2023-02-15 20:11:53,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:11:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:11:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:11:53,120 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:53,543 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-15 20:11:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:11:53,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 20:11:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:53,545 INFO L225 Difference]: With dead ends: 186 [2023-02-15 20:11:53,545 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 20:11:53,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:11:53,546 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:53,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:11:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 20:11:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2023-02-15 20:11:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2023-02-15 20:11:53,576 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2023-02-15 20:11:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2023-02-15 20:11:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2023-02-15 20:11:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 20:11:53,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:53,577 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:53,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:53,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:53,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2023-02-15 20:11:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:53,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101884811] [2023-02-15 20:11:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 20:11:53,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:53,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101884811] [2023-02-15 20:11:53,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101884811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:53,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331954288] [2023-02-15 20:11:53,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:11:53,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:53,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:53,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:11:53,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 20:11:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:11:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 20:11:53,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 20:11:54,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331954288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:54,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:54,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-15 20:11:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275039525] [2023-02-15 20:11:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:11:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:11:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:11:54,006 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:54,437 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-15 20:11:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:11:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 20:11:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:54,438 INFO L225 Difference]: With dead ends: 208 [2023-02-15 20:11:54,438 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 20:11:54,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:11:54,438 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:11:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 20:11:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2023-02-15 20:11:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2023-02-15 20:11:54,458 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2023-02-15 20:11:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:54,458 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-15 20:11:54,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2023-02-15 20:11:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 20:11:54,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:54,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:54,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 20:11:54,663 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2023-02-15 20:11:54,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:54,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846325851] [2023-02-15 20:11:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:54,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846325851] [2023-02-15 20:11:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846325851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:54,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708018803] [2023-02-15 20:11:54,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:11:54,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:54,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:54,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:11:54,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:11:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:11:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:11:54,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:11:54,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708018803] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:54,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:54,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-15 20:11:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263860859] [2023-02-15 20:11:54,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:54,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 20:11:54,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 20:11:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-15 20:11:54,946 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:55,905 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2023-02-15 20:11:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-15 20:11:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 20:11:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:55,907 INFO L225 Difference]: With dead ends: 242 [2023-02-15 20:11:55,907 INFO L226 Difference]: Without dead ends: 206 [2023-02-15 20:11:55,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 20:11:55,908 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:55,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 207 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 20:11:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-15 20:11:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 106. [2023-02-15 20:11:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-02-15 20:11:55,930 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 22 [2023-02-15 20:11:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:55,930 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-02-15 20:11:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2023-02-15 20:11:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:11:55,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:55,931 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:55,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:56,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 20:11:56,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1537171731, now seen corresponding path program 4 times [2023-02-15 20:11:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:56,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036807483] [2023-02-15 20:11:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:11:56,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036807483] [2023-02-15 20:11:56,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036807483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603349732] [2023-02-15 20:11:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:11:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:56,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:11:56,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:11:56,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:56,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:11:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:11:56,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 20:11:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603349732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:56,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:56,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 18 [2023-02-15 20:11:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596766722] [2023-02-15 20:11:56,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:11:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:11:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:11:56,509 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:57,173 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2023-02-15 20:11:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 20:11:57,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:11:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:57,174 INFO L225 Difference]: With dead ends: 204 [2023-02-15 20:11:57,174 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 20:11:57,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 20:11:57,175 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:57,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 156 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:11:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 20:11:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-02-15 20:11:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2023-02-15 20:11:57,207 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 23 [2023-02-15 20:11:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:57,207 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2023-02-15 20:11:57,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2023-02-15 20:11:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 20:11:57,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:57,208 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:57,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:57,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 20:11:57,411 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 257480285, now seen corresponding path program 2 times [2023-02-15 20:11:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:57,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192501630] [2023-02-15 20:11:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 20:11:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192501630] [2023-02-15 20:11:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192501630] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405529965] [2023-02-15 20:11:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:11:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:57,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:11:57,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:11:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:11:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:57,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:11:57,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405529965] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:57,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:57,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2023-02-15 20:11:57,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790189068] [2023-02-15 20:11:57,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:57,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:11:57,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:11:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:11:57,740 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:11:58,015 INFO L93 Difference]: Finished difference Result 313 states and 468 transitions. [2023-02-15 20:11:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 20:11:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 20:11:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:11:58,017 INFO L225 Difference]: With dead ends: 313 [2023-02-15 20:11:58,017 INFO L226 Difference]: Without dead ends: 256 [2023-02-15 20:11:58,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:11:58,017 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:11:58,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 175 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:11:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-15 20:11:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2023-02-15 20:11:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.3657142857142857) internal successors, (239), 175 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 239 transitions. [2023-02-15 20:11:58,050 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 239 transitions. Word has length 23 [2023-02-15 20:11:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:11:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 239 transitions. [2023-02-15 20:11:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:11:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 239 transitions. [2023-02-15 20:11:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:11:58,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:11:58,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:11:58,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 20:11:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 20:11:58,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:11:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:11:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 4 times [2023-02-15 20:11:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:11:58,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299498352] [2023-02-15 20:11:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:11:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:11:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:11:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:11:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:11:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299498352] [2023-02-15 20:11:58,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299498352] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:11:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701113517] [2023-02-15 20:11:58,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:11:58,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:11:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:11:58,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:11:58,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:11:58,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:11:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:11:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:11:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:11:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 20:11:58,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:11:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 20:11:58,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701113517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:11:58,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:11:58,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-15 20:11:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535451441] [2023-02-15 20:11:58,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:11:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:11:58,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:11:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:11:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:11:58,556 INFO L87 Difference]: Start difference. First operand 176 states and 239 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:01,328 INFO L93 Difference]: Finished difference Result 600 states and 786 transitions. [2023-02-15 20:12:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-15 20:12:01,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 20:12:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:01,331 INFO L225 Difference]: With dead ends: 600 [2023-02-15 20:12:01,331 INFO L226 Difference]: Without dead ends: 544 [2023-02-15 20:12:01,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4534 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1023, Invalid=11859, Unknown=0, NotChecked=0, Total=12882 [2023-02-15 20:12:01,334 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 380 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:01,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 257 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 20:12:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-02-15 20:12:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 200. [2023-02-15 20:12:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3668341708542713) internal successors, (272), 199 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 272 transitions. [2023-02-15 20:12:01,395 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 272 transitions. Word has length 25 [2023-02-15 20:12:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:01,396 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 272 transitions. [2023-02-15 20:12:01,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2023-02-15 20:12:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 20:12:01,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:01,396 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:01,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 20:12:01,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1883036162, now seen corresponding path program 1 times [2023-02-15 20:12:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334426395] [2023-02-15 20:12:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 20:12:01,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334426395] [2023-02-15 20:12:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334426395] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919180169] [2023-02-15 20:12:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:01,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:01,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:01,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:12:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:12:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 20:12:01,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 20:12:01,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919180169] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:01,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:01,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 8] total 22 [2023-02-15 20:12:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589973731] [2023-02-15 20:12:01,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:12:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:12:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:12:01,950 INFO L87 Difference]: Start difference. First operand 200 states and 272 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:03,099 INFO L93 Difference]: Finished difference Result 390 states and 566 transitions. [2023-02-15 20:12:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 20:12:03,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 20:12:03,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:03,101 INFO L225 Difference]: With dead ends: 390 [2023-02-15 20:12:03,101 INFO L226 Difference]: Without dead ends: 298 [2023-02-15 20:12:03,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 20:12:03,102 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:03,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 370 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 20:12:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-15 20:12:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 212. [2023-02-15 20:12:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.3649289099526067) internal successors, (288), 211 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 288 transitions. [2023-02-15 20:12:03,148 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 288 transitions. Word has length 25 [2023-02-15 20:12:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:03,148 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 288 transitions. [2023-02-15 20:12:03,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 288 transitions. [2023-02-15 20:12:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 20:12:03,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:03,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:03,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 20:12:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 20:12:03,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 3 times [2023-02-15 20:12:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534713648] [2023-02-15 20:12:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 20:12:03,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534713648] [2023-02-15 20:12:03,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534713648] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019127886] [2023-02-15 20:12:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:12:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:03,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:03,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 20:12:03,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:12:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:03,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:12:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 20:12:03,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 20:12:03,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019127886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:03,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:03,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-02-15 20:12:03,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072468393] [2023-02-15 20:12:03,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:03,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 20:12:03,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 20:12:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:12:03,615 INFO L87 Difference]: Start difference. First operand 212 states and 288 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:03,902 INFO L93 Difference]: Finished difference Result 426 states and 557 transitions. [2023-02-15 20:12:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:12:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 20:12:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:03,904 INFO L225 Difference]: With dead ends: 426 [2023-02-15 20:12:03,904 INFO L226 Difference]: Without dead ends: 396 [2023-02-15 20:12:03,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-15 20:12:03,905 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:03,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 123 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:12:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-15 20:12:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 216. [2023-02-15 20:12:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3534883720930233) internal successors, (291), 215 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 291 transitions. [2023-02-15 20:12:03,966 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 291 transitions. Word has length 26 [2023-02-15 20:12:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:03,967 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 291 transitions. [2023-02-15 20:12:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 291 transitions. [2023-02-15 20:12:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:12:03,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:03,968 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:03,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:04,173 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 2 times [2023-02-15 20:12:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:04,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074827355] [2023-02-15 20:12:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 20:12:04,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074827355] [2023-02-15 20:12:04,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074827355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975847407] [2023-02-15 20:12:04,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:12:04,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:04,316 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:04,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 20:12:04,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:12:04,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 20:12:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 20:12:04,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 20:12:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975847407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:04,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 18 [2023-02-15 20:12:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492481619] [2023-02-15 20:12:04,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:12:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:12:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:12:04,487 INFO L87 Difference]: Start difference. First operand 216 states and 291 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:04,973 INFO L93 Difference]: Finished difference Result 476 states and 693 transitions. [2023-02-15 20:12:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 20:12:04,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 20:12:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:04,976 INFO L225 Difference]: With dead ends: 476 [2023-02-15 20:12:04,976 INFO L226 Difference]: Without dead ends: 425 [2023-02-15 20:12:04,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:12:04,977 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 146 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:04,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 374 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:12:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-15 20:12:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 248. [2023-02-15 20:12:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3360323886639676) internal successors, (330), 247 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 330 transitions. [2023-02-15 20:12:05,052 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 330 transitions. Word has length 27 [2023-02-15 20:12:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:05,052 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 330 transitions. [2023-02-15 20:12:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 330 transitions. [2023-02-15 20:12:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:12:05,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:05,054 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:05,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:05,256 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 5 times [2023-02-15 20:12:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583949941] [2023-02-15 20:12:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:05,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:12:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583949941] [2023-02-15 20:12:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583949941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451149210] [2023-02-15 20:12:05,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:12:05,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:05,445 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:05,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 20:12:05,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 20:12:05,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:05,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 20:12:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:12:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:12:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451149210] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:05,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:05,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2023-02-15 20:12:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750860192] [2023-02-15 20:12:05,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:12:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:12:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:12:05,943 INFO L87 Difference]: Start difference. First operand 248 states and 330 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:08,079 INFO L93 Difference]: Finished difference Result 539 states and 795 transitions. [2023-02-15 20:12:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-15 20:12:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 20:12:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:08,081 INFO L225 Difference]: With dead ends: 539 [2023-02-15 20:12:08,081 INFO L226 Difference]: Without dead ends: 472 [2023-02-15 20:12:08,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1797, Invalid=5685, Unknown=0, NotChecked=0, Total=7482 [2023-02-15 20:12:08,083 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 282 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 381 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 20:12:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-15 20:12:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2023-02-15 20:12:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.3569131832797428) internal successors, (422), 311 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2023-02-15 20:12:08,199 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 28 [2023-02-15 20:12:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:08,199 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2023-02-15 20:12:08,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2023-02-15 20:12:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 20:12:08,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:08,200 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:08,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:08,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2023-02-15 20:12:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:08,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770300238] [2023-02-15 20:12:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 20:12:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770300238] [2023-02-15 20:12:08,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770300238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:08,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166950098] [2023-02-15 20:12:08,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:12:08,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:08,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:08,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 20:12:08,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:12:08,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:12:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 20:12:08,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-15 20:12:08,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166950098] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:08,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:08,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2023-02-15 20:12:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209320787] [2023-02-15 20:12:08,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:12:08,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:12:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:12:08,689 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:09,196 INFO L93 Difference]: Finished difference Result 627 states and 919 transitions. [2023-02-15 20:12:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 20:12:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 20:12:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:09,199 INFO L225 Difference]: With dead ends: 627 [2023-02-15 20:12:09,199 INFO L226 Difference]: Without dead ends: 545 [2023-02-15 20:12:09,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:12:09,200 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 169 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:09,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 404 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:12:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-15 20:12:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 347. [2023-02-15 20:12:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3641618497109826) internal successors, (472), 346 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 472 transitions. [2023-02-15 20:12:09,319 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 472 transitions. Word has length 29 [2023-02-15 20:12:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:09,319 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 472 transitions. [2023-02-15 20:12:09,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 472 transitions. [2023-02-15 20:12:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:12:09,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:09,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:09,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:09,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:09,528 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2023-02-15 20:12:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707473301] [2023-02-15 20:12:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:09,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 20:12:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:09,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707473301] [2023-02-15 20:12:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707473301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756734299] [2023-02-15 20:12:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:12:09,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:09,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:09,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 20:12:09,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-15 20:12:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 20:12:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 20:12:09,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 20:12:09,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756734299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:09,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:09,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-15 20:12:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014073332] [2023-02-15 20:12:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:12:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:09,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:12:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:12:09,835 INFO L87 Difference]: Start difference. First operand 347 states and 472 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:10,179 INFO L93 Difference]: Finished difference Result 573 states and 770 transitions. [2023-02-15 20:12:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:12:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-15 20:12:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:10,181 INFO L225 Difference]: With dead ends: 573 [2023-02-15 20:12:10,181 INFO L226 Difference]: Without dead ends: 458 [2023-02-15 20:12:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:12:10,182 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:10,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 139 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:12:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-15 20:12:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2023-02-15 20:12:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3628318584070795) internal successors, (462), 339 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 462 transitions. [2023-02-15 20:12:10,314 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 462 transitions. Word has length 30 [2023-02-15 20:12:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:10,314 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 462 transitions. [2023-02-15 20:12:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 462 transitions. [2023-02-15 20:12:10,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:12:10,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:10,315 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:10,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:10,520 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1044326056, now seen corresponding path program 6 times [2023-02-15 20:12:10,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416834580] [2023-02-15 20:12:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 20:12:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416834580] [2023-02-15 20:12:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416834580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181229708] [2023-02-15 20:12:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:12:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:10,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:10,684 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:10,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 20:12:10,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 20:12:10,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:12:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 20:12:10,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 20:12:10,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181229708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:10,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:10,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-15 20:12:10,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738311174] [2023-02-15 20:12:10,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:10,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:12:10,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:10,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:12:10,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:12:10,865 INFO L87 Difference]: Start difference. First operand 340 states and 462 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:16,578 INFO L93 Difference]: Finished difference Result 1057 states and 1334 transitions. [2023-02-15 20:12:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-02-15 20:12:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-15 20:12:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:16,581 INFO L225 Difference]: With dead ends: 1057 [2023-02-15 20:12:16,581 INFO L226 Difference]: Without dead ends: 972 [2023-02-15 20:12:16,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9400 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1822, Invalid=22984, Unknown=0, NotChecked=0, Total=24806 [2023-02-15 20:12:16,585 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 411 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:16,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 425 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 20:12:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2023-02-15 20:12:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 358. [2023-02-15 20:12:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3641456582633054) internal successors, (487), 357 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2023-02-15 20:12:16,727 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 30 [2023-02-15 20:12:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:16,728 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2023-02-15 20:12:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2023-02-15 20:12:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:12:16,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:16,729 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:16,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:16,929 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 7 times [2023-02-15 20:12:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:16,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795548497] [2023-02-15 20:12:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:12:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795548497] [2023-02-15 20:12:17,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795548497] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483918852] [2023-02-15 20:12:17,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:12:17,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:17,156 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:17,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 20:12:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 20:12:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 20:12:17,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 20:12:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483918852] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:17,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:17,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-15 20:12:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760764570] [2023-02-15 20:12:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:12:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:12:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:12:17,357 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:33,800 INFO L93 Difference]: Finished difference Result 1299 states and 1654 transitions. [2023-02-15 20:12:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-02-15 20:12:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:12:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:33,803 INFO L225 Difference]: With dead ends: 1299 [2023-02-15 20:12:33,803 INFO L226 Difference]: Without dead ends: 1219 [2023-02-15 20:12:33,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30317 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=3844, Invalid=68786, Unknown=0, NotChecked=0, Total=72630 [2023-02-15 20:12:33,807 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 784 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:33,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 603 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 3044 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-15 20:12:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-02-15 20:12:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 392. [2023-02-15 20:12:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.3682864450127876) internal successors, (535), 391 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 535 transitions. [2023-02-15 20:12:33,997 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 535 transitions. Word has length 31 [2023-02-15 20:12:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:33,997 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 535 transitions. [2023-02-15 20:12:33,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 535 transitions. [2023-02-15 20:12:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 20:12:33,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:33,998 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:34,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 20:12:34,203 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 3 times [2023-02-15 20:12:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:34,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562443791] [2023-02-15 20:12:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 20:12:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562443791] [2023-02-15 20:12:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562443791] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767437688] [2023-02-15 20:12:34,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:12:34,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:34,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:34,380 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:34,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 20:12:34,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:12:34,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 20:12:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 20:12:34,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 20:12:34,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767437688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:34,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:34,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 29 [2023-02-15 20:12:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809735584] [2023-02-15 20:12:34,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:34,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 20:12:34,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 20:12:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-02-15 20:12:34,707 INFO L87 Difference]: Start difference. First operand 392 states and 535 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:37,093 INFO L93 Difference]: Finished difference Result 740 states and 1081 transitions. [2023-02-15 20:12:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-15 20:12:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 20:12:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:37,094 INFO L225 Difference]: With dead ends: 740 [2023-02-15 20:12:37,095 INFO L226 Difference]: Without dead ends: 589 [2023-02-15 20:12:37,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1108, Invalid=7448, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:12:37,096 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 289 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:37,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 610 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 20:12:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-02-15 20:12:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 446. [2023-02-15 20:12:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.341573033707865) internal successors, (597), 445 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 597 transitions. [2023-02-15 20:12:37,322 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 597 transitions. Word has length 31 [2023-02-15 20:12:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:37,322 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 597 transitions. [2023-02-15 20:12:37,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 597 transitions. [2023-02-15 20:12:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 20:12:37,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:37,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:37,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 20:12:37,525 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 6 times [2023-02-15 20:12:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151906200] [2023-02-15 20:12:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 20:12:37,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151906200] [2023-02-15 20:12:37,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151906200] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543775712] [2023-02-15 20:12:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:12:37,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:37,677 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:37,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 20:12:37,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 20:12:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:12:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 20:12:37,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 20:12:37,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543775712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:37,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:37,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-15 20:12:37,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510708278] [2023-02-15 20:12:37,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:37,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 20:12:37,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 20:12:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-15 20:12:37,816 INFO L87 Difference]: Start difference. First operand 446 states and 597 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:39,055 INFO L93 Difference]: Finished difference Result 1004 states and 1284 transitions. [2023-02-15 20:12:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 20:12:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 20:12:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:39,057 INFO L225 Difference]: With dead ends: 1004 [2023-02-15 20:12:39,057 INFO L226 Difference]: Without dead ends: 940 [2023-02-15 20:12:39,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-02-15 20:12:39,058 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 205 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:39,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 163 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:12:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2023-02-15 20:12:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 486. [2023-02-15 20:12:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.3216494845360824) internal successors, (641), 485 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 641 transitions. [2023-02-15 20:12:39,289 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 641 transitions. Word has length 32 [2023-02-15 20:12:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:39,290 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 641 transitions. [2023-02-15 20:12:39,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 641 transitions. [2023-02-15 20:12:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 20:12:39,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:39,291 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:39,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-15 20:12:39,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 20:12:39,495 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 4 times [2023-02-15 20:12:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:39,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562247682] [2023-02-15 20:12:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:12:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562247682] [2023-02-15 20:12:39,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562247682] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128580132] [2023-02-15 20:12:39,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:12:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:39,697 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:39,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 20:12:39,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:12:39,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:39,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 20:12:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 20:12:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 20:12:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128580132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:39,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:39,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 6] total 21 [2023-02-15 20:12:39,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736217638] [2023-02-15 20:12:39,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:39,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:12:39,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:12:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:12:39,882 INFO L87 Difference]: Start difference. First operand 486 states and 641 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:40,926 INFO L93 Difference]: Finished difference Result 953 states and 1378 transitions. [2023-02-15 20:12:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 20:12:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 20:12:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:40,928 INFO L225 Difference]: With dead ends: 953 [2023-02-15 20:12:40,928 INFO L226 Difference]: Without dead ends: 856 [2023-02-15 20:12:40,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 20:12:40,929 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 238 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:40,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 678 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 20:12:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-02-15 20:12:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 531. [2023-02-15 20:12:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.3320754716981131) internal successors, (706), 530 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 706 transitions. [2023-02-15 20:12:41,193 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 706 transitions. Word has length 33 [2023-02-15 20:12:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:41,193 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 706 transitions. [2023-02-15 20:12:41,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 706 transitions. [2023-02-15 20:12:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 20:12:41,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:41,195 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:41,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:41,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:41,399 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:41,399 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 5 times [2023-02-15 20:12:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994921324] [2023-02-15 20:12:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:12:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994921324] [2023-02-15 20:12:41,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994921324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701968569] [2023-02-15 20:12:41,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:12:41,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:41,587 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:41,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 20:12:41,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 20:12:41,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 20:12:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:12:42,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:12:42,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701968569] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:42,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:42,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2023-02-15 20:12:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077556167] [2023-02-15 20:12:42,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:42,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 20:12:42,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 20:12:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 20:12:42,479 INFO L87 Difference]: Start difference. First operand 531 states and 706 transitions. Second operand has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:12:51,358 INFO L93 Difference]: Finished difference Result 892 states and 1233 transitions. [2023-02-15 20:12:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-15 20:12:51,359 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 20:12:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:12:51,360 INFO L225 Difference]: With dead ends: 892 [2023-02-15 20:12:51,360 INFO L226 Difference]: Without dead ends: 710 [2023-02-15 20:12:51,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1075, Invalid=12265, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 20:12:51,361 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 247 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:12:51,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 554 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 20:12:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-02-15 20:12:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 529. [2023-02-15 20:12:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.3333333333333333) internal successors, (704), 528 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 704 transitions. [2023-02-15 20:12:51,637 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 704 transitions. Word has length 34 [2023-02-15 20:12:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:12:51,637 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 704 transitions. [2023-02-15 20:12:51,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:12:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 704 transitions. [2023-02-15 20:12:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 20:12:51,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:12:51,638 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:12:51,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 20:12:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 20:12:51,843 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:12:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:12:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 8 times [2023-02-15 20:12:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:12:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832456290] [2023-02-15 20:12:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:12:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:12:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:12:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:12:52,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:12:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832456290] [2023-02-15 20:12:52,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832456290] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:12:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440836872] [2023-02-15 20:12:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:12:52,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:12:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:12:52,099 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:12:52,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 20:12:52,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:12:52,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:12:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:12:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:12:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 20:12:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:12:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 20:12:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440836872] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:12:52,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:12:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-15 20:12:52,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128239754] [2023-02-15 20:12:52,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:12:52,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:12:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:12:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:12:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:12:52,324 INFO L87 Difference]: Start difference. First operand 529 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:13:30,584 INFO L93 Difference]: Finished difference Result 1907 states and 2362 transitions. [2023-02-15 20:13:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2023-02-15 20:13:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 20:13:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:13:30,588 INFO L225 Difference]: With dead ends: 1907 [2023-02-15 20:13:30,589 INFO L226 Difference]: Without dead ends: 1814 [2023-02-15 20:13:30,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64964 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=6843, Invalid=141767, Unknown=0, NotChecked=0, Total=148610 [2023-02-15 20:13:30,595 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1093 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 4428 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 5187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 4428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:13:30,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 689 Invalid, 5187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 4428 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 20:13:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-02-15 20:13:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 602. [2023-02-15 20:13:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.3277870216306156) internal successors, (798), 601 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 798 transitions. [2023-02-15 20:13:30,985 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 798 transitions. Word has length 34 [2023-02-15 20:13:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:13:30,985 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 798 transitions. [2023-02-15 20:13:30,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 798 transitions. [2023-02-15 20:13:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 20:13:30,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:13:30,987 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:13:30,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 20:13:31,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:31,193 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:13:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:13:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1724449625, now seen corresponding path program 7 times [2023-02-15 20:13:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:13:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371714534] [2023-02-15 20:13:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:13:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:13:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:13:31,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:13:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371714534] [2023-02-15 20:13:31,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371714534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:13:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110994241] [2023-02-15 20:13:31,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:13:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:13:31,376 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:13:31,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 20:13:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:31,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 20:13:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:13:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 20:13:31,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:13:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-02-15 20:13:31,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110994241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:13:31,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:13:31,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 5] total 21 [2023-02-15 20:13:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365765567] [2023-02-15 20:13:31,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:13:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 20:13:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:13:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 20:13:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:13:31,539 INFO L87 Difference]: Start difference. First operand 602 states and 798 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:13:33,030 INFO L93 Difference]: Finished difference Result 961 states and 1353 transitions. [2023-02-15 20:13:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 20:13:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 20:13:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:13:33,032 INFO L225 Difference]: With dead ends: 961 [2023-02-15 20:13:33,032 INFO L226 Difference]: Without dead ends: 807 [2023-02-15 20:13:33,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=2786, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 20:13:33,033 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 86 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:13:33,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 996 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 20:13:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-02-15 20:13:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 629. [2023-02-15 20:13:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.3152866242038217) internal successors, (826), 628 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 826 transitions. [2023-02-15 20:13:33,418 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 826 transitions. Word has length 34 [2023-02-15 20:13:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:13:33,419 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 826 transitions. [2023-02-15 20:13:33,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 826 transitions. [2023-02-15 20:13:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 20:13:33,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:13:33,420 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:13:33,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 20:13:33,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-15 20:13:33,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:13:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:13:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2177502, now seen corresponding path program 6 times [2023-02-15 20:13:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:13:33,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889412807] [2023-02-15 20:13:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:13:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:13:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:13:33,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:13:33,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889412807] [2023-02-15 20:13:33,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889412807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:13:33,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117938112] [2023-02-15 20:13:33,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:13:33,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:33,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:13:33,868 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:13:33,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 20:13:34,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 20:13:34,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:13:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 20:13:34,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:13:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:13:34,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:13:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 20:13:34,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117938112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:13:34,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:13:34,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 8] total 27 [2023-02-15 20:13:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164193313] [2023-02-15 20:13:34,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:13:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:13:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:13:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:13:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:13:34,310 INFO L87 Difference]: Start difference. First operand 629 states and 826 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:13:36,995 INFO L93 Difference]: Finished difference Result 1006 states and 1404 transitions. [2023-02-15 20:13:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-15 20:13:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 20:13:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:13:36,997 INFO L225 Difference]: With dead ends: 1006 [2023-02-15 20:13:36,997 INFO L226 Difference]: Without dead ends: 794 [2023-02-15 20:13:36,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=474, Invalid=6006, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 20:13:36,998 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 164 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:13:36,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 928 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 20:13:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-02-15 20:13:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 612. [2023-02-15 20:13:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.3240589198036006) internal successors, (809), 611 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 809 transitions. [2023-02-15 20:13:37,389 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 809 transitions. Word has length 35 [2023-02-15 20:13:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:13:37,390 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 809 transitions. [2023-02-15 20:13:37,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 809 transitions. [2023-02-15 20:13:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 20:13:37,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:13:37,391 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:13:37,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 20:13:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:37,591 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:13:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:13:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 8 times [2023-02-15 20:13:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:13:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048855079] [2023-02-15 20:13:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:13:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:13:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 20:13:37,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:13:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048855079] [2023-02-15 20:13:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048855079] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:13:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532468639] [2023-02-15 20:13:37,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:13:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:13:37,742 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:13:37,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 20:13:37,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:13:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:13:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 20:13:37,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:13:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 20:13:37,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:13:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 20:13:37,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532468639] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:13:37,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:13:37,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-15 20:13:37,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599500810] [2023-02-15 20:13:37,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:13:37,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:13:37,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:13:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:13:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:13:37,844 INFO L87 Difference]: Start difference. First operand 612 states and 809 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:13:38,940 INFO L93 Difference]: Finished difference Result 1015 states and 1317 transitions. [2023-02-15 20:13:38,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:13:38,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-15 20:13:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:13:38,944 INFO L225 Difference]: With dead ends: 1015 [2023-02-15 20:13:38,944 INFO L226 Difference]: Without dead ends: 855 [2023-02-15 20:13:38,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:13:38,944 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:13:38,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 203 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:13:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-02-15 20:13:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 593. [2023-02-15 20:13:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.3243243243243243) internal successors, (784), 592 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 784 transitions. [2023-02-15 20:13:39,341 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 784 transitions. Word has length 36 [2023-02-15 20:13:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:13:39,341 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 784 transitions. [2023-02-15 20:13:39,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:13:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 784 transitions. [2023-02-15 20:13:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:13:39,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:13:39,342 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:13:39,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 20:13:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:39,547 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:13:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:13:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash 532015789, now seen corresponding path program 7 times [2023-02-15 20:13:39,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:13:39,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618103422] [2023-02-15 20:13:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:13:39,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:13:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 20:13:39,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:13:39,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618103422] [2023-02-15 20:13:39,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618103422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:13:39,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748502605] [2023-02-15 20:13:39,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:13:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:13:39,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:13:39,779 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:13:39,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 20:13:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:13:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 20:13:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:13:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 20:13:39,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:13:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 20:13:40,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748502605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:13:40,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:13:40,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-15 20:13:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443361384] [2023-02-15 20:13:40,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:13:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 20:13:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:13:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 20:13:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2023-02-15 20:13:40,016 INFO L87 Difference]: Start difference. First operand 593 states and 784 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:14:06,965 INFO L93 Difference]: Finished difference Result 2085 states and 2487 transitions. [2023-02-15 20:14:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2023-02-15 20:14:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 20:14:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:14:06,970 INFO L225 Difference]: With dead ends: 2085 [2023-02-15 20:14:06,970 INFO L226 Difference]: Without dead ends: 1960 [2023-02-15 20:14:06,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49320 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=5863, Invalid=108719, Unknown=0, NotChecked=0, Total=114582 [2023-02-15 20:14:06,974 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1076 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 4104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:14:06,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 770 Invalid, 4104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 3459 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 20:14:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2023-02-15 20:14:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 588. [2023-02-15 20:14:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.3168654173764907) internal successors, (773), 587 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 773 transitions. [2023-02-15 20:14:07,368 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 773 transitions. Word has length 37 [2023-02-15 20:14:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:14:07,368 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 773 transitions. [2023-02-15 20:14:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 773 transitions. [2023-02-15 20:14:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:14:07,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:14:07,369 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:14:07,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-15 20:14:07,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:07,569 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:14:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:14:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 9 times [2023-02-15 20:14:07,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:14:07,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034466994] [2023-02-15 20:14:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:14:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:14:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:14:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:14:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:14:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034466994] [2023-02-15 20:14:07,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034466994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:14:07,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439239748] [2023-02-15 20:14:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:14:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:14:07,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:14:07,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 20:14:07,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 20:14:07,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:14:07,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 20:14:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:14:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-15 20:14:08,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:14:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-15 20:14:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439239748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:14:08,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:14:08,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 39 [2023-02-15 20:14:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683075695] [2023-02-15 20:14:08,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:14:08,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 20:14:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:14:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 20:14:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 20:14:08,406 INFO L87 Difference]: Start difference. First operand 588 states and 773 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:14:25,711 INFO L93 Difference]: Finished difference Result 2622 states and 3509 transitions. [2023-02-15 20:14:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-02-15 20:14:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 20:14:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:14:25,716 INFO L225 Difference]: With dead ends: 2622 [2023-02-15 20:14:25,716 INFO L226 Difference]: Without dead ends: 2367 [2023-02-15 20:14:25,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12462 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=6325, Invalid=24827, Unknown=0, NotChecked=0, Total=31152 [2023-02-15 20:14:25,718 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 994 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 5138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 4402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:14:25,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1044 Invalid, 5138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 4402 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-15 20:14:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2023-02-15 20:14:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 633. [2023-02-15 20:14:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.3212025316455696) internal successors, (835), 632 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 835 transitions. [2023-02-15 20:14:26,113 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 835 transitions. Word has length 37 [2023-02-15 20:14:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:14:26,114 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 835 transitions. [2023-02-15 20:14:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 835 transitions. [2023-02-15 20:14:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:14:26,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:14:26,115 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:14:26,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 20:14:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-15 20:14:26,319 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:14:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:14:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash -467390659, now seen corresponding path program 9 times [2023-02-15 20:14:26,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:14:26,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339775678] [2023-02-15 20:14:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:14:26,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:14:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:14:26,571 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:14:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:14:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339775678] [2023-02-15 20:14:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339775678] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:14:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718528726] [2023-02-15 20:14:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:14:26,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:14:26,572 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:14:26,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 20:14:26,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:14:26,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:14:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 20:14:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:14:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-15 20:14:26,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:14:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-15 20:14:26,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718528726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:14:26,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:14:26,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 24 [2023-02-15 20:14:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329390577] [2023-02-15 20:14:26,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:14:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:14:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:14:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:14:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:14:26,710 INFO L87 Difference]: Start difference. First operand 633 states and 835 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:14:30,339 INFO L93 Difference]: Finished difference Result 1216 states and 1702 transitions. [2023-02-15 20:14:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-02-15 20:14:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 20:14:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:14:30,341 INFO L225 Difference]: With dead ends: 1216 [2023-02-15 20:14:30,341 INFO L226 Difference]: Without dead ends: 1013 [2023-02-15 20:14:30,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4567 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=935, Invalid=13345, Unknown=0, NotChecked=0, Total=14280 [2023-02-15 20:14:30,342 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 140 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:14:30,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 940 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 20:14:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-15 20:14:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 703. [2023-02-15 20:14:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.3219373219373218) internal successors, (928), 702 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 928 transitions. [2023-02-15 20:14:30,792 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 928 transitions. Word has length 39 [2023-02-15 20:14:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:14:30,792 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 928 transitions. [2023-02-15 20:14:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 928 transitions. [2023-02-15 20:14:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:14:30,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:14:30,793 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:14:30,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-15 20:14:30,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 20:14:30,993 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:14:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:14:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 490706360, now seen corresponding path program 8 times [2023-02-15 20:14:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:14:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134289244] [2023-02-15 20:14:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:14:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:14:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:14:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 20:14:31,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:14:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134289244] [2023-02-15 20:14:31,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134289244] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:14:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754588355] [2023-02-15 20:14:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:14:31,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:14:31,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:14:31,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 20:14:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:14:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:14:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 20:14:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:14:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 20:14:31,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:14:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-15 20:14:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754588355] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:14:31,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:14:31,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 10] total 33 [2023-02-15 20:14:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916508982] [2023-02-15 20:14:31,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:14:31,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:14:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:14:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:14:31,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:14:31,580 INFO L87 Difference]: Start difference. First operand 703 states and 928 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:14:36,700 INFO L93 Difference]: Finished difference Result 1283 states and 1776 transitions. [2023-02-15 20:14:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-02-15 20:14:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-15 20:14:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:14:36,703 INFO L225 Difference]: With dead ends: 1283 [2023-02-15 20:14:36,703 INFO L226 Difference]: Without dead ends: 1032 [2023-02-15 20:14:36,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=811, Invalid=12529, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 20:14:36,704 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 204 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:14:36,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1336 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 20:14:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2023-02-15 20:14:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 671. [2023-02-15 20:14:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.3223880597014925) internal successors, (886), 670 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 886 transitions. [2023-02-15 20:14:37,157 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 886 transitions. Word has length 40 [2023-02-15 20:14:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:14:37,157 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 886 transitions. [2023-02-15 20:14:37,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:14:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 886 transitions. [2023-02-15 20:14:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 20:14:37,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:14:37,158 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:14:37,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 20:14:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:37,369 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:14:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:14:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -553251971, now seen corresponding path program 9 times [2023-02-15 20:14:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:14:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51342631] [2023-02-15 20:14:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:14:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:14:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:14:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:14:37,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:14:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51342631] [2023-02-15 20:14:37,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51342631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:14:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532362739] [2023-02-15 20:14:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:14:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:14:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:14:37,697 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:14:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 20:14:37,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 20:14:37,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:14:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 20:14:37,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:14:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 20:14:38,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:14:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-15 20:14:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532362739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:14:38,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:14:38,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 21] total 52 [2023-02-15 20:14:38,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067491522] [2023-02-15 20:14:38,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:14:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:14:38,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:14:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:14:38,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=2132, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:14:38,690 INFO L87 Difference]: Start difference. First operand 671 states and 886 transitions. Second operand has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:15:14,400 INFO L93 Difference]: Finished difference Result 1596 states and 2274 transitions. [2023-02-15 20:15:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-02-15 20:15:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-15 20:15:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:15:14,403 INFO L225 Difference]: With dead ends: 1596 [2023-02-15 20:15:14,403 INFO L226 Difference]: Without dead ends: 1421 [2023-02-15 20:15:14,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9666 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=6427, Invalid=22643, Unknown=0, NotChecked=0, Total=29070 [2023-02-15 20:15:14,404 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 522 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 5055 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 5572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 5055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:15:14,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 553 Invalid, 5572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 5055 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-15 20:15:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2023-02-15 20:15:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 830. [2023-02-15 20:15:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.2834740651387213) internal successors, (1064), 829 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1064 transitions. [2023-02-15 20:15:15,139 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1064 transitions. Word has length 41 [2023-02-15 20:15:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:15:15,139 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1064 transitions. [2023-02-15 20:15:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 52 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1064 transitions. [2023-02-15 20:15:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 20:15:15,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:15:15,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:15:15,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 20:15:15,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 20:15:15,345 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:15:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:15:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 10 times [2023-02-15 20:15:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:15:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025410449] [2023-02-15 20:15:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:15:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:15:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:15:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 20:15:15,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:15:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025410449] [2023-02-15 20:15:15,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025410449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:15:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198499907] [2023-02-15 20:15:15,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:15:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:15:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:15:15,527 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:15:15,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 20:15:15,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:15:15,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:15:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 20:15:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:15:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 20:15:15,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:15:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 20:15:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198499907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:15:15,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:15:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-02-15 20:15:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174901923] [2023-02-15 20:15:15,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:15:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:15:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:15:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:15:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:15:15,632 INFO L87 Difference]: Start difference. First operand 830 states and 1064 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:15:17,254 INFO L93 Difference]: Finished difference Result 1061 states and 1371 transitions. [2023-02-15 20:15:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:15:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-15 20:15:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:15:17,256 INFO L225 Difference]: With dead ends: 1061 [2023-02-15 20:15:17,257 INFO L226 Difference]: Without dead ends: 1026 [2023-02-15 20:15:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:15:17,257 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:15:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 284 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:15:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2023-02-15 20:15:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 822. [2023-02-15 20:15:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.2935444579780755) internal successors, (1062), 821 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1062 transitions. [2023-02-15 20:15:18,006 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1062 transitions. Word has length 42 [2023-02-15 20:15:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:15:18,006 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1062 transitions. [2023-02-15 20:15:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:15:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1062 transitions. [2023-02-15 20:15:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 20:15:18,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:15:18,007 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:15:18,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 20:15:18,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 20:15:18,207 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:15:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:15:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1263287635, now seen corresponding path program 10 times [2023-02-15 20:15:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:15:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391786633] [2023-02-15 20:15:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:15:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:15:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:15:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 20:15:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:15:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391786633] [2023-02-15 20:15:18,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391786633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:15:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936950199] [2023-02-15 20:15:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:15:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:15:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:15:18,522 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:15:18,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 20:15:18,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:15:18,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:15:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 20:15:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:15:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 20:15:18,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:15:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 20:15:18,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936950199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:15:18,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:15:18,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2023-02-15 20:15:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404283691] [2023-02-15 20:15:18,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:15:18,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:15:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:15:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:15:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:15:18,840 INFO L87 Difference]: Start difference. First operand 822 states and 1062 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)