./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 26d01a9c 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-?-26d01a9 [2023-02-17 01:14:14,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:14:14,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:14:14,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:14:14,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:14:14,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:14:14,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:14:14,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:14:14,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:14:14,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:14:14,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:14:14,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:14:14,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:14:14,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:14:14,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:14:14,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:14:14,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:14:14,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:14:14,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:14:14,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:14:14,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:14:14,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:14:14,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:14:14,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:14:14,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:14:14,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:14:14,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:14:14,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:14:14,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:14:14,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:14:14,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:14:14,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:14:14,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:14:14,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:14:14,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:14:14,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:14:14,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:14:14,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:14:14,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:14:14,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:14:14,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:14:14,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:14:14,394 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:14:14,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:14:14,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:14:14,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:14:14,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:14:14,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:14:14,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:14:14,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:14:14,397 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:14:14,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:14:14,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:14:14,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:14:14,399 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:14:14,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:14:14,399 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:14:14,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:14:14,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:14:14,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:14:14,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:14:14,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:14:14,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:14:14,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:14:14,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:14:14,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:14:14,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:14:14,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:14:14,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:14:14,402 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:14:14,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:14:14,403 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:14:14,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2023-02-17 01:14:14,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:14:14,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:14:14,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:14:14,654 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:14:14,654 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:14:14,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-17 01:14:15,859 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:14:15,998 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:14:15,999 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-17 01:14:16,003 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5071dce4/2154fd6c1f8f40fba4fe325af72eefd4/FLAGdcc2ddaff [2023-02-17 01:14:16,018 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5071dce4/2154fd6c1f8f40fba4fe325af72eefd4 [2023-02-17 01:14:16,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:14:16,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:14:16,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:14:16,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:14:16,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:14:16,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e170cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16, skipping insertion in model container [2023-02-17 01:14:16,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:14:16,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:14:16,150 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] [2023-02-17 01:14:16,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:14:16,179 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:14:16,189 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] [2023-02-17 01:14:16,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:14:16,217 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:14:16,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16 WrapperNode [2023-02-17 01:14:16,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:14:16,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:14:16,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:14:16,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:14:16,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,242 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-17 01:14:16,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:14:16,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:14:16,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:14:16,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:14:16,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:14:16,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:14:16,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:14:16,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:14:16,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (1/1) ... [2023-02-17 01:14:16,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:14:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:16,300 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) [2023-02-17 01:14:16,302 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 [2023-02-17 01:14:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:14:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:14:16,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:14:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:14:16,387 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:14:16,389 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:14:16,494 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:14:16,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:14:16,500 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 01:14:16,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:14:16 BoogieIcfgContainer [2023-02-17 01:14:16,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:14:16,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:14:16,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:14:16,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:14:16,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:14:16" (1/3) ... [2023-02-17 01:14:16,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3a9869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:14:16, skipping insertion in model container [2023-02-17 01:14:16,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:14:16" (2/3) ... [2023-02-17 01:14:16,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3a9869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:14:16, skipping insertion in model container [2023-02-17 01:14:16,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:14:16" (3/3) ... [2023-02-17 01:14:16,509 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-02-17 01:14:16,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:14:16,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:14:16,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:14:16,570 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;@6b4155f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:14:16,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:14:16,573 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) [2023-02-17 01:14:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 01:14:16,577 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:16,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:16,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-17 01:14:16,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:16,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611211624] [2023-02-17 01:14:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:16,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611211624] [2023-02-17 01:14:16,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611211624] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:14:16,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:14:16,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:14:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085281706] [2023-02-17 01:14:16,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:16,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:14:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:14:16,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:14:16,766 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) [2023-02-17 01:14:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:16,777 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-17 01:14:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:14:16,779 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 [2023-02-17 01:14:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:16,783 INFO L225 Difference]: With dead ends: 31 [2023-02-17 01:14:16,783 INFO L226 Difference]: Without dead ends: 13 [2023-02-17 01:14:16,785 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 [2023-02-17 01:14:16,788 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 [2023-02-17 01:14:16,789 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] [2023-02-17 01:14:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-17 01:14:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-17 01:14:16,808 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) [2023-02-17 01:14:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-17 01:14:16,810 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-17 01:14:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:16,810 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-17 01:14:16,810 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) [2023-02-17 01:14:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-17 01:14:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 01:14:16,811 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:16,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 01:14:16,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-17 01:14:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491640136] [2023-02-17 01:14:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:17,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:17,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491640136] [2023-02-17 01:14:17,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491640136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:14:17,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:14:17,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 01:14:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730831111] [2023-02-17 01:14:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:17,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 01:14:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 01:14:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 01:14:17,021 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) [2023-02-17 01:14:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:17,111 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-02-17 01:14:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 01:14:17,111 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 [2023-02-17 01:14:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:17,112 INFO L225 Difference]: With dead ends: 27 [2023-02-17 01:14:17,112 INFO L226 Difference]: Without dead ends: 18 [2023-02-17 01:14:17,112 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 [2023-02-17 01:14:17,113 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 [2023-02-17 01:14:17,114 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] [2023-02-17 01:14:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-17 01:14:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-17 01:14:17,119 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) [2023-02-17 01:14:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-17 01:14:17,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2023-02-17 01:14:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:17,120 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-17 01:14:17,121 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) [2023-02-17 01:14:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-17 01:14:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 01:14:17,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:17,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 01:14:17,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2023-02-17 01:14:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:17,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582935185] [2023-02-17 01:14:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:17,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:17,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582935185] [2023-02-17 01:14:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582935185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:14:17,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:14:17,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 01:14:17,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318763027] [2023-02-17 01:14:17,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 01:14:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 01:14:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 01:14:17,195 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) [2023-02-17 01:14:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:17,252 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-02-17 01:14:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 01:14:17,252 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 [2023-02-17 01:14:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:17,253 INFO L225 Difference]: With dead ends: 41 [2023-02-17 01:14:17,253 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 01:14:17,253 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 [2023-02-17 01:14:17,255 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 [2023-02-17 01:14:17,255 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] [2023-02-17 01:14:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 01:14:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 01:14:17,263 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) [2023-02-17 01:14:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-02-17 01:14:17,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2023-02-17 01:14:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:17,271 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-02-17 01:14:17,272 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) [2023-02-17 01:14:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-02-17 01:14:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 01:14:17,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:17,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:17,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 01:14:17,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:17,275 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2023-02-17 01:14:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:17,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099413936] [2023-02-17 01:14:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:17,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:17,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099413936] [2023-02-17 01:14:17,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099413936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:14:17,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:14:17,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 01:14:17,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532374033] [2023-02-17 01:14:17,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:17,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 01:14:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 01:14:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 01:14:17,336 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) [2023-02-17 01:14:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:17,358 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-17 01:14:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 01:14:17,359 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 [2023-02-17 01:14:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:17,359 INFO L225 Difference]: With dead ends: 43 [2023-02-17 01:14:17,360 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 01:14:17,361 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 [2023-02-17 01:14:17,363 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 [2023-02-17 01:14:17,363 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] [2023-02-17 01:14:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 01:14:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 01:14:17,373 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) [2023-02-17 01:14:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-02-17 01:14:17,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2023-02-17 01:14:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:17,374 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-02-17 01:14:17,374 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) [2023-02-17 01:14:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-02-17 01:14:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 01:14:17,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:17,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 01:14:17,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2023-02-17 01:14:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:17,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951652811] [2023-02-17 01:14:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:17,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951652811] [2023-02-17 01:14:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951652811] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:14:17,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:14:17,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 01:14:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179626524] [2023-02-17 01:14:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 01:14:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 01:14:17,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 01:14:17,468 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) [2023-02-17 01:14:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:17,499 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-02-17 01:14:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 01:14:17,499 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 [2023-02-17 01:14:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:17,500 INFO L225 Difference]: With dead ends: 41 [2023-02-17 01:14:17,500 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 01:14:17,501 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 [2023-02-17 01:14:17,502 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 [2023-02-17 01:14:17,502 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] [2023-02-17 01:14:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 01:14:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 01:14:17,510 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) [2023-02-17 01:14:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2023-02-17 01:14:17,514 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2023-02-17 01:14:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:17,515 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2023-02-17 01:14:17,515 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) [2023-02-17 01:14:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2023-02-17 01:14:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 01:14:17,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:17,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 01:14:17,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2023-02-17 01:14:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:17,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498727797] [2023-02-17 01:14:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:17,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:17,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498727797] [2023-02-17 01:14:17,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498727797] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:17,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082004815] [2023-02-17 01:14:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:17,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:17,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:17,647 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) [2023-02-17 01:14:17,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 01:14:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 01:14:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082004815] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:17,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:14:17,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-17 01:14:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806212283] [2023-02-17 01:14:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:14:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 01:14:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 01:14:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 01:14:17,799 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) [2023-02-17 01:14:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:17,845 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-17 01:14:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 01:14:17,846 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 [2023-02-17 01:14:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:17,847 INFO L225 Difference]: With dead ends: 35 [2023-02-17 01:14:17,847 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 01:14:17,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 01:14:17,849 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 [2023-02-17 01:14:17,849 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] [2023-02-17 01:14:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 01:14:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-17 01:14:17,856 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) [2023-02-17 01:14:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-02-17 01:14:17,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2023-02-17 01:14:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:17,857 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-02-17 01:14:17,858 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) [2023-02-17 01:14:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-02-17 01:14:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 01:14:17,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:17,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:17,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:18,064 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 [2023-02-17 01:14:18,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2023-02-17 01:14:18,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:18,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159705583] [2023-02-17 01:14:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:18,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 01:14:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159705583] [2023-02-17 01:14:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159705583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828744409] [2023-02-17 01:14:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:18,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:18,169 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) [2023-02-17 01:14:18,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 01:14:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 01:14:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:18,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:14:18,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828744409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:18,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 9 [2023-02-17 01:14:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96734544] [2023-02-17 01:14:18,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:14:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:14:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:14:18,274 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:18,413 INFO L93 Difference]: Finished difference Result 99 states and 146 transitions. [2023-02-17 01:14:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:14:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2023-02-17 01:14:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:18,419 INFO L225 Difference]: With dead ends: 99 [2023-02-17 01:14:18,419 INFO L226 Difference]: Without dead ends: 82 [2023-02-17 01:14:18,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:14:18,422 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:18,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:14:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-17 01:14:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2023-02-17 01:14:18,446 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) [2023-02-17 01:14:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2023-02-17 01:14:18,450 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2023-02-17 01:14:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:18,450 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2023-02-17 01:14:18,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2023-02-17 01:14:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 01:14:18,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:18,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:18,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-17 01:14:18,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2023-02-17 01:14:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019861612] [2023-02-17 01:14:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019861612] [2023-02-17 01:14:18,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019861612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920870599] [2023-02-17 01:14:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:18,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:18,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:18,799 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) [2023-02-17 01:14:18,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 01:14:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:18,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 01:14:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:18,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:18,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920870599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:18,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:18,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-17 01:14:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892041942] [2023-02-17 01:14:18,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 01:14:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 01:14:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 01:14:18,933 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) [2023-02-17 01:14:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:19,003 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2023-02-17 01:14:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 01:14:19,003 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 [2023-02-17 01:14:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:19,004 INFO L225 Difference]: With dead ends: 101 [2023-02-17 01:14:19,004 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 01:14:19,005 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 [2023-02-17 01:14:19,008 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 [2023-02-17 01:14:19,008 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] [2023-02-17 01:14:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 01:14:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-17 01:14:19,025 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) [2023-02-17 01:14:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-02-17 01:14:19,027 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-02-17 01:14:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:19,027 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-02-17 01:14:19,028 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) [2023-02-17 01:14:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-02-17 01:14:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 01:14:19,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:19,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:19,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:19,239 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 [2023-02-17 01:14:19,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2023-02-17 01:14:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:19,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896959252] [2023-02-17 01:14:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:19,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896959252] [2023-02-17 01:14:19,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896959252] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130786042] [2023-02-17 01:14:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:19,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:19,309 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) [2023-02-17 01:14:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 01:14:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 01:14:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:14:19,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 01:14:19,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130786042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:19,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:19,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-02-17 01:14:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335668760] [2023-02-17 01:14:19,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:19,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:14:19,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:14:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:14:19,436 INFO L87 Difference]: Start difference. First operand 65 states and 96 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) [2023-02-17 01:14:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:19,566 INFO L93 Difference]: Finished difference Result 126 states and 190 transitions. [2023-02-17 01:14:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:14:19,567 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 17 [2023-02-17 01:14:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:19,568 INFO L225 Difference]: With dead ends: 126 [2023-02-17 01:14:19,568 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 01:14:19,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:14:19,570 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:19,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 53 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:14:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 01:14:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2023-02-17 01:14:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 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) [2023-02-17 01:14:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2023-02-17 01:14:19,613 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 17 [2023-02-17 01:14:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:19,613 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2023-02-17 01:14:19,613 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) [2023-02-17 01:14:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2023-02-17 01:14:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 01:14:19,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:19,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:19,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:19,822 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 [2023-02-17 01:14:19,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-17 01:14:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:19,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636987449] [2023-02-17 01:14:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636987449] [2023-02-17 01:14:19,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636987449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816445620] [2023-02-17 01:14:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:19,986 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) [2023-02-17 01:14:19,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 01:14:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:14:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:20,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:14:20,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816445620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:20,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:20,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-17 01:14:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685865779] [2023-02-17 01:14:20,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 01:14:20,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 01:14:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:14:20,089 INFO L87 Difference]: Start difference. First operand 84 states and 121 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) [2023-02-17 01:14:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:20,151 INFO L93 Difference]: Finished difference Result 137 states and 200 transitions. [2023-02-17 01:14:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 01:14:20,151 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 [2023-02-17 01:14:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:20,152 INFO L225 Difference]: With dead ends: 137 [2023-02-17 01:14:20,152 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 01:14:20,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:14:20,153 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 [2023-02-17 01:14:20,153 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] [2023-02-17 01:14:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 01:14:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-02-17 01:14:20,169 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) [2023-02-17 01:14:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-02-17 01:14:20,169 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2023-02-17 01:14:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:20,169 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-02-17 01:14:20,170 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) [2023-02-17 01:14:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-02-17 01:14:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 01:14:20,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:20,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:20,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:20,377 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 [2023-02-17 01:14:20,377 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2023-02-17 01:14:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:20,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504658786] [2023-02-17 01:14:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 01:14:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:20,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504658786] [2023-02-17 01:14:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504658786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723228733] [2023-02-17 01:14:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:14:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:20,452 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) [2023-02-17 01:14:20,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 01:14:20,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:14:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 01:14:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 01:14:20,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 01:14:20,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723228733] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:20,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:20,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-17 01:14:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116461501] [2023-02-17 01:14:20,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:20,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:14:20,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:14:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:14:20,573 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) [2023-02-17 01:14:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:20,772 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2023-02-17 01:14:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 01:14:20,773 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 [2023-02-17 01:14:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:20,774 INFO L225 Difference]: With dead ends: 138 [2023-02-17 01:14:20,774 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 01:14:20,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:14:20,776 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:20,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 105 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:14:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 01:14:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2023-02-17 01:14:20,793 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) [2023-02-17 01:14:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-02-17 01:14:20,794 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2023-02-17 01:14:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:20,795 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-02-17 01:14:20,795 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) [2023-02-17 01:14:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-02-17 01:14:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 01:14:20,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:20,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:20,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:21,001 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 [2023-02-17 01:14:21,002 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2023-02-17 01:14:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825544693] [2023-02-17 01:14:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825544693] [2023-02-17 01:14:21,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825544693] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277434449] [2023-02-17 01:14:21,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:14:21,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:21,106 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) [2023-02-17 01:14:21,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 01:14:21,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:14:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 01:14:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:14:21,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:14:21,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277434449] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:21,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:21,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-17 01:14:21,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984666376] [2023-02-17 01:14:21,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:14:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:14:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:14:21,185 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) [2023-02-17 01:14:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:21,622 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-17 01:14:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:14:21,623 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 [2023-02-17 01:14:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:21,624 INFO L225 Difference]: With dead ends: 186 [2023-02-17 01:14:21,624 INFO L226 Difference]: Without dead ends: 152 [2023-02-17 01:14:21,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:14:21,625 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:21,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 155 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:14:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-17 01:14:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2023-02-17 01:14:21,647 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) [2023-02-17 01:14:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2023-02-17 01:14:21,647 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2023-02-17 01:14:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:21,648 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2023-02-17 01:14:21,648 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) [2023-02-17 01:14:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2023-02-17 01:14:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 01:14:21,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:21,649 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:21,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:21,859 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 [2023-02-17 01:14:21,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2023-02-17 01:14:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:21,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174503045] [2023-02-17 01:14:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 01:14:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174503045] [2023-02-17 01:14:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174503045] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273248147] [2023-02-17 01:14:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:14:21,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:21,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:21,944 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) [2023-02-17 01:14:21,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 01:14:21,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 01:14:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 01:14:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 01:14:22,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 01:14:22,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273248147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:22,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:22,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-17 01:14:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268161336] [2023-02-17 01:14:22,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:22,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 01:14:22,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 01:14:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:14:22,069 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) [2023-02-17 01:14:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:22,533 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-17 01:14:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:14:22,533 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 [2023-02-17 01:14:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:22,534 INFO L225 Difference]: With dead ends: 208 [2023-02-17 01:14:22,534 INFO L226 Difference]: Without dead ends: 141 [2023-02-17 01:14:22,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:14:22,535 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:22,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:14:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-17 01:14:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2023-02-17 01:14:22,555 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) [2023-02-17 01:14:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2023-02-17 01:14:22,556 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2023-02-17 01:14:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:22,556 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-17 01:14:22,556 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) [2023-02-17 01:14:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2023-02-17 01:14:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 01:14:22,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:22,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:22,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:22,765 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 [2023-02-17 01:14:22,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2023-02-17 01:14:22,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:22,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261066867] [2023-02-17 01:14:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:22,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261066867] [2023-02-17 01:14:22,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261066867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027722134] [2023-02-17 01:14:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:14:22,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:22,929 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) [2023-02-17 01:14:22,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 01:14:22,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:14:22,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:22,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 01:14:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:14:23,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:14:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027722134] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:23,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:23,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-17 01:14:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110792209] [2023-02-17 01:14:23,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:14:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:14:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:14:23,043 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) [2023-02-17 01:14:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:23,921 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2023-02-17 01:14:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-17 01:14:23,922 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 [2023-02-17 01:14:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:23,923 INFO L225 Difference]: With dead ends: 242 [2023-02-17 01:14:23,923 INFO L226 Difference]: Without dead ends: 206 [2023-02-17 01:14:23,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 01:14:23,925 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:23,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 241 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 01:14:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-17 01:14:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 106. [2023-02-17 01:14:23,953 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) [2023-02-17 01:14:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-02-17 01:14:23,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 22 [2023-02-17 01:14:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:23,954 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-02-17 01:14:23,954 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) [2023-02-17 01:14:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2023-02-17 01:14:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 01:14:23,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:23,956 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:23,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:24,162 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 [2023-02-17 01:14:24,162 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1537171731, now seen corresponding path program 4 times [2023-02-17 01:14:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:24,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078458017] [2023-02-17 01:14:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:14:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078458017] [2023-02-17 01:14:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078458017] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441240573] [2023-02-17 01:14:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:14:24,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:24,281 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) [2023-02-17 01:14:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 01:14:24,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:14:24,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 01:14:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:14:24,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 01:14:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441240573] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:24,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:24,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 18 [2023-02-17 01:14:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613506511] [2023-02-17 01:14:24,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:24,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:14:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:14:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:14:24,465 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) [2023-02-17 01:14:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:25,113 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2023-02-17 01:14:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-17 01:14:25,114 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 [2023-02-17 01:14:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:25,115 INFO L225 Difference]: With dead ends: 204 [2023-02-17 01:14:25,115 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 01:14:25,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 01:14:25,119 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:25,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 203 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:14:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 01:14:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-02-17 01:14:25,145 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) [2023-02-17 01:14:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2023-02-17 01:14:25,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 23 [2023-02-17 01:14:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:25,146 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2023-02-17 01:14:25,146 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) [2023-02-17 01:14:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2023-02-17 01:14:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 01:14:25,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:25,147 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:25,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:25,353 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 [2023-02-17 01:14:25,353 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 257480285, now seen corresponding path program 2 times [2023-02-17 01:14:25,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:25,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58798838] [2023-02-17 01:14:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:25,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 01:14:25,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58798838] [2023-02-17 01:14:25,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58798838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061598262] [2023-02-17 01:14:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:14:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:25,460 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) [2023-02-17 01:14:25,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 01:14:25,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:14:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 01:14:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:25,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:14:25,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061598262] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:25,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:25,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2023-02-17 01:14:25,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4088830] [2023-02-17 01:14:25,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:14:25,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:14:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:14:25,662 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) [2023-02-17 01:14:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:25,989 INFO L93 Difference]: Finished difference Result 313 states and 468 transitions. [2023-02-17 01:14:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 01:14:25,989 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 [2023-02-17 01:14:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:25,990 INFO L225 Difference]: With dead ends: 313 [2023-02-17 01:14:25,991 INFO L226 Difference]: Without dead ends: 256 [2023-02-17 01:14:25,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:14:25,991 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 110 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:25,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 183 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:14:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-17 01:14:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2023-02-17 01:14:26,025 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) [2023-02-17 01:14:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 239 transitions. [2023-02-17 01:14:26,026 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 239 transitions. Word has length 23 [2023-02-17 01:14:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:26,026 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 239 transitions. [2023-02-17 01:14:26,026 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) [2023-02-17 01:14:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 239 transitions. [2023-02-17 01:14:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 01:14:26,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:26,027 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:26,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:26,232 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 [2023-02-17 01:14:26,233 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 4 times [2023-02-17 01:14:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884119216] [2023-02-17 01:14:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:26,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:26,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884119216] [2023-02-17 01:14:26,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884119216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479252451] [2023-02-17 01:14:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:14:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:26,369 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) [2023-02-17 01:14:26,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 01:14:26,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:14:26,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 01:14:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 01:14:26,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 01:14:26,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479252451] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:26,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:26,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-17 01:14:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270283885] [2023-02-17 01:14:26,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:14:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:14:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:14:26,499 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) [2023-02-17 01:14:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:28,782 INFO L93 Difference]: Finished difference Result 600 states and 786 transitions. [2023-02-17 01:14:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-17 01:14:28,783 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 [2023-02-17 01:14:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:28,785 INFO L225 Difference]: With dead ends: 600 [2023-02-17 01:14:28,785 INFO L226 Difference]: Without dead ends: 544 [2023-02-17 01:14:28,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4534 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1023, Invalid=11859, Unknown=0, NotChecked=0, Total=12882 [2023-02-17 01:14:28,789 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 386 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:28,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 257 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 01:14:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-02-17 01:14:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 200. [2023-02-17 01:14:28,832 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) [2023-02-17 01:14:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 272 transitions. [2023-02-17 01:14:28,833 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 272 transitions. Word has length 25 [2023-02-17 01:14:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:28,833 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 272 transitions. [2023-02-17 01:14:28,833 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) [2023-02-17 01:14:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2023-02-17 01:14:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 01:14:28,834 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:28,834 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:28,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:29,039 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 [2023-02-17 01:14:29,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1883036162, now seen corresponding path program 1 times [2023-02-17 01:14:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128621984] [2023-02-17 01:14:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 01:14:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128621984] [2023-02-17 01:14:29,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128621984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713996299] [2023-02-17 01:14:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:29,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:29,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:29,148 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) [2023-02-17 01:14:29,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 01:14:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:14:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 01:14:29,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:14:29,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713996299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:29,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:29,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 8] total 22 [2023-02-17 01:14:29,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774948712] [2023-02-17 01:14:29,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:29,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 01:14:29,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 01:14:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:14:29,365 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) [2023-02-17 01:14:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:30,323 INFO L93 Difference]: Finished difference Result 390 states and 566 transitions. [2023-02-17 01:14:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-17 01:14:30,324 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 [2023-02-17 01:14:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:30,326 INFO L225 Difference]: With dead ends: 390 [2023-02-17 01:14:30,326 INFO L226 Difference]: Without dead ends: 298 [2023-02-17 01:14:30,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2023-02-17 01:14:30,327 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:30,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 285 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 01:14:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-17 01:14:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 212. [2023-02-17 01:14:30,378 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) [2023-02-17 01:14:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 288 transitions. [2023-02-17 01:14:30,379 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 288 transitions. Word has length 25 [2023-02-17 01:14:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:30,379 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 288 transitions. [2023-02-17 01:14:30,380 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) [2023-02-17 01:14:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 288 transitions. [2023-02-17 01:14:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 01:14:30,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:30,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:30,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:30,586 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 [2023-02-17 01:14:30,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 3 times [2023-02-17 01:14:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:30,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125948325] [2023-02-17 01:14:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 01:14:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125948325] [2023-02-17 01:14:30,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125948325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207826748] [2023-02-17 01:14:30,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:14:30,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:30,763 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) [2023-02-17 01:14:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 01:14:30,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:14:30,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 01:14:30,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 01:14:30,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 01:14:30,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207826748] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:30,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:30,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-02-17 01:14:30,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514657251] [2023-02-17 01:14:30,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:30,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:14:30,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:14:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:14:30,932 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) [2023-02-17 01:14:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:31,243 INFO L93 Difference]: Finished difference Result 426 states and 557 transitions. [2023-02-17 01:14:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:14:31,244 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 [2023-02-17 01:14:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:31,245 INFO L225 Difference]: With dead ends: 426 [2023-02-17 01:14:31,246 INFO L226 Difference]: Without dead ends: 396 [2023-02-17 01:14:31,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:14:31,247 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:31,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 118 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:14:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-17 01:14:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 216. [2023-02-17 01:14:31,303 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) [2023-02-17 01:14:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 291 transitions. [2023-02-17 01:14:31,304 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 291 transitions. Word has length 26 [2023-02-17 01:14:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:31,304 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 291 transitions. [2023-02-17 01:14:31,304 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) [2023-02-17 01:14:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 291 transitions. [2023-02-17 01:14:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 01:14:31,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:31,305 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:31,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:31,510 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 [2023-02-17 01:14:31,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 2 times [2023-02-17 01:14:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:31,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787412053] [2023-02-17 01:14:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 01:14:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787412053] [2023-02-17 01:14:31,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787412053] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174388338] [2023-02-17 01:14:31,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:14:31,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:31,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:31,638 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) [2023-02-17 01:14:31,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 01:14:31,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:14:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:31,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-17 01:14:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 01:14:31,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 01:14:31,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174388338] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:31,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:31,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 18 [2023-02-17 01:14:31,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013385442] [2023-02-17 01:14:31,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:31,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:14:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:31,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:14:31,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:14:31,827 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) [2023-02-17 01:14:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:32,283 INFO L93 Difference]: Finished difference Result 476 states and 693 transitions. [2023-02-17 01:14:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 01:14:32,284 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 [2023-02-17 01:14:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:32,285 INFO L225 Difference]: With dead ends: 476 [2023-02-17 01:14:32,285 INFO L226 Difference]: Without dead ends: 425 [2023-02-17 01:14:32,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-17 01:14:32,286 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 144 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:32,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 383 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:14:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-17 01:14:32,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 248. [2023-02-17 01:14:32,346 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) [2023-02-17 01:14:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 330 transitions. [2023-02-17 01:14:32,346 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 330 transitions. Word has length 27 [2023-02-17 01:14:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:32,347 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 330 transitions. [2023-02-17 01:14:32,347 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) [2023-02-17 01:14:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 330 transitions. [2023-02-17 01:14:32,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 01:14:32,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:32,348 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:32,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:32,549 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 [2023-02-17 01:14:32,549 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:32,550 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 5 times [2023-02-17 01:14:32,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:32,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551630765] [2023-02-17 01:14:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:32,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:32,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551630765] [2023-02-17 01:14:32,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551630765] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705906793] [2023-02-17 01:14:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:14:32,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:32,720 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) [2023-02-17 01:14:32,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 01:14:32,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 01:14:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 01:14:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:32,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:14:33,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705906793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:33,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:33,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2023-02-17 01:14:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366100939] [2023-02-17 01:14:33,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 01:14:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 01:14:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:14:33,209 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) [2023-02-17 01:14:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:35,037 INFO L93 Difference]: Finished difference Result 539 states and 795 transitions. [2023-02-17 01:14:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-17 01:14:35,038 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 [2023-02-17 01:14:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:35,040 INFO L225 Difference]: With dead ends: 539 [2023-02-17 01:14:35,040 INFO L226 Difference]: Without dead ends: 472 [2023-02-17 01:14:35,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1797, Invalid=5685, Unknown=0, NotChecked=0, Total=7482 [2023-02-17 01:14:35,042 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 281 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:35,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 389 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 01:14:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-17 01:14:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2023-02-17 01:14:35,144 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) [2023-02-17 01:14:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2023-02-17 01:14:35,145 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 28 [2023-02-17 01:14:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:35,145 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2023-02-17 01:14:35,145 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) [2023-02-17 01:14:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2023-02-17 01:14:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 01:14:35,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:35,146 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:35,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:35,352 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 [2023-02-17 01:14:35,352 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2023-02-17 01:14:35,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:35,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876040267] [2023-02-17 01:14:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:35,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 01:14:35,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:35,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876040267] [2023-02-17 01:14:35,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876040267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127831548] [2023-02-17 01:14:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:14:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:35,504 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) [2023-02-17 01:14:35,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 01:14:35,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:14:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:14:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 01:14:35,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-17 01:14:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127831548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:35,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2023-02-17 01:14:35,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612827797] [2023-02-17 01:14:35,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:35,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 01:14:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 01:14:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:14:35,691 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) [2023-02-17 01:14:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:36,194 INFO L93 Difference]: Finished difference Result 627 states and 919 transitions. [2023-02-17 01:14:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 01:14:36,196 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 [2023-02-17 01:14:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:36,197 INFO L225 Difference]: With dead ends: 627 [2023-02-17 01:14:36,198 INFO L226 Difference]: Without dead ends: 545 [2023-02-17 01:14:36,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:14:36,199 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:36,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 439 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:14:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-02-17 01:14:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 347. [2023-02-17 01:14:36,304 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) [2023-02-17 01:14:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 472 transitions. [2023-02-17 01:14:36,305 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 472 transitions. Word has length 29 [2023-02-17 01:14:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:36,306 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 472 transitions. [2023-02-17 01:14:36,306 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) [2023-02-17 01:14:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 472 transitions. [2023-02-17 01:14:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 01:14:36,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:36,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:36,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:36,513 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 [2023-02-17 01:14:36,514 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2023-02-17 01:14:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624700730] [2023-02-17 01:14:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 01:14:36,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:36,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624700730] [2023-02-17 01:14:36,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624700730] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:36,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024055925] [2023-02-17 01:14:36,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:14:36,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:36,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:36,690 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) [2023-02-17 01:14:36,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 01:14:36,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-17 01:14:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 01:14:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:14:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:14:36,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024055925] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:36,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:36,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-17 01:14:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604628779] [2023-02-17 01:14:36,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 01:14:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 01:14:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 01:14:36,881 INFO L87 Difference]: Start difference. First operand 347 states and 472 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:37,148 INFO L93 Difference]: Finished difference Result 573 states and 770 transitions. [2023-02-17 01:14:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 01:14:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2023-02-17 01:14:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:37,153 INFO L225 Difference]: With dead ends: 573 [2023-02-17 01:14:37,153 INFO L226 Difference]: Without dead ends: 458 [2023-02-17 01:14:37,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 17 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:14:37,154 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:37,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 139 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:14:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-02-17 01:14:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2023-02-17 01:14:37,275 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) [2023-02-17 01:14:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 462 transitions. [2023-02-17 01:14:37,276 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 462 transitions. Word has length 30 [2023-02-17 01:14:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:37,276 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 462 transitions. [2023-02-17 01:14:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 462 transitions. [2023-02-17 01:14:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 01:14:37,276 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:37,276 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:37,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:37,477 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 [2023-02-17 01:14:37,477 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1044326056, now seen corresponding path program 6 times [2023-02-17 01:14:37,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:37,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964992660] [2023-02-17 01:14:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:37,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 01:14:37,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964992660] [2023-02-17 01:14:37,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964992660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512870722] [2023-02-17 01:14:37,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:14:37,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:37,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:37,636 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) [2023-02-17 01:14:37,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 01:14:37,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 01:14:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 01:14:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-17 01:14:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-17 01:14:37,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512870722] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:37,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:37,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-17 01:14:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113809838] [2023-02-17 01:14:37,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:37,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:14:37,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:14:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:14:37,815 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) [2023-02-17 01:14:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:42,747 INFO L93 Difference]: Finished difference Result 1057 states and 1334 transitions. [2023-02-17 01:14:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-02-17 01:14:42,747 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 [2023-02-17 01:14:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:42,750 INFO L225 Difference]: With dead ends: 1057 [2023-02-17 01:14:42,751 INFO L226 Difference]: Without dead ends: 972 [2023-02-17 01:14:42,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9400 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1822, Invalid=22984, Unknown=0, NotChecked=0, Total=24806 [2023-02-17 01:14:42,757 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 411 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 432 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-17 01:14:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2023-02-17 01:14:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 358. [2023-02-17 01:14:42,900 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) [2023-02-17 01:14:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2023-02-17 01:14:42,901 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 30 [2023-02-17 01:14:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:42,902 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2023-02-17 01:14:42,902 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) [2023-02-17 01:14:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2023-02-17 01:14:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 01:14:42,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:42,903 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:42,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:43,106 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 [2023-02-17 01:14:43,106 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 7 times [2023-02-17 01:14:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:43,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145308962] [2023-02-17 01:14:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:43,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:14:43,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145308962] [2023-02-17 01:14:43,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145308962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:43,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171485637] [2023-02-17 01:14:43,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 01:14:43,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:43,322 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) [2023-02-17 01:14:43,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 01:14:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 01:14:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 01:14:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 01:14:43,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171485637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:43,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:43,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-17 01:14:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994226746] [2023-02-17 01:14:43,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:43,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:14:43,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:14:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:14:43,489 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) [2023-02-17 01:14:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:54,586 INFO L93 Difference]: Finished difference Result 1299 states and 1654 transitions. [2023-02-17 01:14:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-02-17 01:14:54,586 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 [2023-02-17 01:14:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:54,590 INFO L225 Difference]: With dead ends: 1299 [2023-02-17 01:14:54,590 INFO L226 Difference]: Without dead ends: 1219 [2023-02-17 01:14:54,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30317 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3844, Invalid=68786, Unknown=0, NotChecked=0, Total=72630 [2023-02-17 01:14:54,596 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 760 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:54,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 671 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 3346 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-17 01:14:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-02-17 01:14:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 392. [2023-02-17 01:14:54,753 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) [2023-02-17 01:14:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 535 transitions. [2023-02-17 01:14:54,753 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 535 transitions. Word has length 31 [2023-02-17 01:14:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:54,753 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 535 transitions. [2023-02-17 01:14:54,754 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) [2023-02-17 01:14:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 535 transitions. [2023-02-17 01:14:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 01:14:54,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:54,754 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:54,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:54,955 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 [2023-02-17 01:14:54,955 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 3 times [2023-02-17 01:14:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:54,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286358849] [2023-02-17 01:14:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 01:14:55,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286358849] [2023-02-17 01:14:55,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286358849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931282365] [2023-02-17 01:14:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:14:55,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:55,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:55,122 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) [2023-02-17 01:14:55,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 01:14:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:14:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 01:14:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-02-17 01:14:55,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-02-17 01:14:55,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931282365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:55,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:55,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 25 [2023-02-17 01:14:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979224493] [2023-02-17 01:14:55,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:55,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 01:14:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 01:14:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:14:55,326 INFO L87 Difference]: Start difference. First operand 392 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2023-02-17 01:14:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:56,419 INFO L93 Difference]: Finished difference Result 744 states and 1106 transitions. [2023-02-17 01:14:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-17 01:14:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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 31 [2023-02-17 01:14:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:56,422 INFO L225 Difference]: With dead ends: 744 [2023-02-17 01:14:56,422 INFO L226 Difference]: Without dead ends: 641 [2023-02-17 01:14:56,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=2627, Unknown=0, NotChecked=0, Total=3192 [2023-02-17 01:14:56,423 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 259 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:56,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 546 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 01:14:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-02-17 01:14:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 444. [2023-02-17 01:14:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.3702031602708804) internal successors, (607), 443 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 607 transitions. [2023-02-17 01:14:56,630 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 607 transitions. Word has length 31 [2023-02-17 01:14:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:56,630 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 607 transitions. [2023-02-17 01:14:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2023-02-17 01:14:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 607 transitions. [2023-02-17 01:14:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 01:14:56,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:56,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:56,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:56,833 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 [2023-02-17 01:14:56,833 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 6 times [2023-02-17 01:14:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:56,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183868239] [2023-02-17 01:14:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-17 01:14:57,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:57,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183868239] [2023-02-17 01:14:57,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183868239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341889416] [2023-02-17 01:14:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:14:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:57,047 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) [2023-02-17 01:14:57,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 01:14:57,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-17 01:14:57,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 01:14:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 01:14:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 01:14:57,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341889416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:57,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:57,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-17 01:14:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301503840] [2023-02-17 01:14:57,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:14:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:14:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:14:57,249 INFO L87 Difference]: Start difference. First operand 444 states and 607 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) [2023-02-17 01:14:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:14:58,672 INFO L93 Difference]: Finished difference Result 1030 states and 1333 transitions. [2023-02-17 01:14:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 01:14:58,673 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 [2023-02-17 01:14:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:14:58,676 INFO L225 Difference]: With dead ends: 1030 [2023-02-17 01:14:58,676 INFO L226 Difference]: Without dead ends: 966 [2023-02-17 01:14:58,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:14:58,677 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:14:58,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 215 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:14:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2023-02-17 01:14:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 469. [2023-02-17 01:14:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.356837606837607) internal successors, (635), 468 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:14:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 635 transitions. [2023-02-17 01:14:58,951 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 635 transitions. Word has length 32 [2023-02-17 01:14:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:14:58,951 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 635 transitions. [2023-02-17 01:14:58,951 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) [2023-02-17 01:14:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 635 transitions. [2023-02-17 01:14:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 01:14:58,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:14:58,955 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:14:58,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 01:14:59,161 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 [2023-02-17 01:14:59,161 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:14:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:14:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 4 times [2023-02-17 01:14:59,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:14:59,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714351084] [2023-02-17 01:14:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:14:59,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:14:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:14:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 01:14:59,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:14:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714351084] [2023-02-17 01:14:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714351084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:14:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873587610] [2023-02-17 01:14:59,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:14:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:14:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:14:59,354 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) [2023-02-17 01:14:59,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 01:14:59,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:14:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:14:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 01:14:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:14:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 01:14:59,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:14:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-17 01:14:59,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873587610] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:14:59,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:14:59,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 6] total 21 [2023-02-17 01:14:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849835018] [2023-02-17 01:14:59,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:14:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:14:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:14:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:14:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:14:59,597 INFO L87 Difference]: Start difference. First operand 469 states and 635 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) [2023-02-17 01:15:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:15:00,677 INFO L93 Difference]: Finished difference Result 918 states and 1345 transitions. [2023-02-17 01:15:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 01:15:00,678 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 [2023-02-17 01:15:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:15:00,680 INFO L225 Difference]: With dead ends: 918 [2023-02-17 01:15:00,680 INFO L226 Difference]: Without dead ends: 821 [2023-02-17 01:15:00,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 01:15:00,680 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 207 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:15:00,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 629 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 01:15:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-02-17 01:15:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 575. [2023-02-17 01:15:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3397212543554007) internal successors, (769), 574 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:15:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 769 transitions. [2023-02-17 01:15:00,989 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 769 transitions. Word has length 33 [2023-02-17 01:15:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:15:00,989 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 769 transitions. [2023-02-17 01:15:00,989 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) [2023-02-17 01:15:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 769 transitions. [2023-02-17 01:15:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 01:15:00,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:15:00,990 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:15:00,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 01:15:01,199 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 [2023-02-17 01:15:01,200 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:15:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:15:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 5 times [2023-02-17 01:15:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:15:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203827722] [2023-02-17 01:15:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:15:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:15:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:15:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 01:15:01,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:15:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203827722] [2023-02-17 01:15:01,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203827722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:15:01,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970509513] [2023-02-17 01:15:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:15:01,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:15:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:15:01,407 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) [2023-02-17 01:15:01,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 01:15:01,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-17 01:15:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:15:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 01:15:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:15:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 01:15:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:15:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 01:15:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970509513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:15:02,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:15:02,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-17 01:15:02,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982539737] [2023-02-17 01:15:02,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:15:02,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 01:15:02,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:15:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 01:15:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 01:15:02,184 INFO L87 Difference]: Start difference. First operand 575 states and 769 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:16:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:16:16,460 INFO L93 Difference]: Finished difference Result 1560 states and 2226 transitions. [2023-02-17 01:16:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2023-02-17 01:16:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2023-02-17 01:16:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:16:16,464 INFO L225 Difference]: With dead ends: 1560 [2023-02-17 01:16:16,464 INFO L226 Difference]: Without dead ends: 1258 [2023-02-17 01:16:16,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116698 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=24240, Invalid=231290, Unknown=0, NotChecked=0, Total=255530 [2023-02-17 01:16:16,475 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2000 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:16:16,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 330 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-02-17 01:16:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2023-02-17 01:16:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 935. [2023-02-17 01:16:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.455032119914347) internal successors, (1359), 934 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:16:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1359 transitions. [2023-02-17 01:16:16,985 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1359 transitions. Word has length 34 [2023-02-17 01:16:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:16:16,986 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1359 transitions. [2023-02-17 01:16:16,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:16:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1359 transitions. [2023-02-17 01:16:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 01:16:16,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:16:16,987 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:16:16,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 01:16:17,197 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 [2023-02-17 01:16:17,197 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:16:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:16:17,198 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 8 times [2023-02-17 01:16:17,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:16:17,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204243349] [2023-02-17 01:16:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:16:17,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:16:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:16:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:16:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:16:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204243349] [2023-02-17 01:16:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204243349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:16:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758773317] [2023-02-17 01:16:17,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:16:17,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:16:17,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:16:17,438 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) [2023-02-17 01:16:17,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 01:16:17,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:16:17,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:16:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 01:16:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:16:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 01:16:17,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:16:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-17 01:16:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758773317] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:16:17,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:16:17,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-17 01:16:17,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439903141] [2023-02-17 01:16:17,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:16:17,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 01:16:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:16:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 01:16:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:16:17,678 INFO L87 Difference]: Start difference. First operand 935 states and 1359 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) [2023-02-17 01:16:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:16:48,572 INFO L93 Difference]: Finished difference Result 2743 states and 3709 transitions. [2023-02-17 01:16:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2023-02-17 01:16:48,573 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 [2023-02-17 01:16:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:16:48,579 INFO L225 Difference]: With dead ends: 2743 [2023-02-17 01:16:48,579 INFO L226 Difference]: Without dead ends: 2582 [2023-02-17 01:16:48,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65170 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=6843, Invalid=141767, Unknown=0, NotChecked=0, Total=148610 [2023-02-17 01:16:48,584 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1228 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 4775 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 5703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 4775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:16:48,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 595 Invalid, 5703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 4775 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-02-17 01:16:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2023-02-17 01:16:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 994. [2023-02-17 01:16:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4290030211480362) internal successors, (1419), 993 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:16:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1419 transitions. [2023-02-17 01:16:49,170 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1419 transitions. Word has length 34 [2023-02-17 01:16:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:16:49,170 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1419 transitions. [2023-02-17 01:16:49,171 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) [2023-02-17 01:16:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1419 transitions. [2023-02-17 01:16:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 01:16:49,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:16:49,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:16:49,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 01:16:49,372 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 [2023-02-17 01:16:49,373 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:16:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:16:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2023-02-17 01:16:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:16:49,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327725493] [2023-02-17 01:16:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:16:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:16:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:16:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 01:16:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:16:49,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327725493] [2023-02-17 01:16:49,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327725493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:16:49,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789306815] [2023-02-17 01:16:49,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 01:16:49,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:16:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:16:49,597 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) [2023-02-17 01:16:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 01:16:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:16:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 01:16:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:16:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 01:16:49,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:16:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 01:16:49,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789306815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:16:49,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:16:49,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-17 01:16:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107273964] [2023-02-17 01:16:49,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:16:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:16:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:16:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:16:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:16:49,756 INFO L87 Difference]: Start difference. First operand 994 states and 1419 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) [2023-02-17 01:16:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:16:51,173 INFO L93 Difference]: Finished difference Result 1588 states and 2214 transitions. [2023-02-17 01:16:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 01:16:51,174 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 [2023-02-17 01:16:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:16:51,177 INFO L225 Difference]: With dead ends: 1588 [2023-02-17 01:16:51,177 INFO L226 Difference]: Without dead ends: 1315 [2023-02-17 01:16:51,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:16:51,178 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 223 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 [2023-02-17 01:16:51,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 223 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:16:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2023-02-17 01:16:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 986. [2023-02-17 01:16:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.43248730964467) internal successors, (1411), 985 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:16:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1411 transitions. [2023-02-17 01:16:51,763 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1411 transitions. Word has length 36 [2023-02-17 01:16:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:16:51,764 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1411 transitions. [2023-02-17 01:16:51,764 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) [2023-02-17 01:16:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1411 transitions. [2023-02-17 01:16:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 01:16:51,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:16:51,766 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:16:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-17 01:16:51,971 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 [2023-02-17 01:16:51,971 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:16:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:16:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash 532015789, now seen corresponding path program 6 times [2023-02-17 01:16:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:16:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715286353] [2023-02-17 01:16:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:16:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:16:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:16:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-17 01:16:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:16:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715286353] [2023-02-17 01:16:52,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715286353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:16:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730149513] [2023-02-17 01:16:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:16:52,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:16:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:16:52,199 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) [2023-02-17 01:16:52,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-17 01:16:52,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-17 01:16:52,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:16:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:16:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:16:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 01:16:52,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:16:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-17 01:16:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730149513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:16:52,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:16:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-17 01:16:52,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122603133] [2023-02-17 01:16:52,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:16:52,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 01:16:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:16:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 01:16:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:16:52,557 INFO L87 Difference]: Start difference. First operand 986 states and 1411 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) [2023-02-17 01:17:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:17:13,996 INFO L93 Difference]: Finished difference Result 2706 states and 3519 transitions. [2023-02-17 01:17:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2023-02-17 01:17:13,997 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 [2023-02-17 01:17:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:17:14,003 INFO L225 Difference]: With dead ends: 2706 [2023-02-17 01:17:14,003 INFO L226 Difference]: Without dead ends: 2576 [2023-02-17 01:17:14,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49225 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5863, Invalid=108719, Unknown=0, NotChecked=0, Total=114582 [2023-02-17 01:17:14,007 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 929 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-17 01:17:14,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 724 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-02-17 01:17:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2023-02-17 01:17:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 969. [2023-02-17 01:17:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 1.4287190082644627) internal successors, (1383), 968 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:17:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1383 transitions. [2023-02-17 01:17:14,581 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1383 transitions. Word has length 37 [2023-02-17 01:17:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:17:14,581 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1383 transitions. [2023-02-17 01:17:14,581 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) [2023-02-17 01:17:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1383 transitions. [2023-02-17 01:17:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 01:17:14,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:17:14,583 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:17:14,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-17 01:17:14,788 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 [2023-02-17 01:17:14,788 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:17:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:17:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 9 times [2023-02-17 01:17:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:17:14,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100951266] [2023-02-17 01:17:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:17:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:17:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:17:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:17:15,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:17:15,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100951266] [2023-02-17 01:17:15,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100951266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:17:15,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430850786] [2023-02-17 01:17:15,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:17:15,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:17:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:17:15,078 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) [2023-02-17 01:17:15,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-17 01:17:15,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 01:17:15,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:17:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 01:17:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:17:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 01:17:15,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:17:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 01:17:15,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430850786] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:17:15,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:17:15,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-17 01:17:15,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133980413] [2023-02-17 01:17:15,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:17:15,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 01:17:15,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:17:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 01:17:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-02-17 01:17:15,405 INFO L87 Difference]: Start difference. First operand 969 states and 1383 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:18:14,250 INFO L93 Difference]: Finished difference Result 3064 states and 4073 transitions. [2023-02-17 01:18:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2023-02-17 01:18:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2023-02-17 01:18:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:18:14,257 INFO L225 Difference]: With dead ends: 3064 [2023-02-17 01:18:14,257 INFO L226 Difference]: Without dead ends: 2938 [2023-02-17 01:18:14,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114805 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=10403, Invalid=246139, Unknown=0, NotChecked=0, Total=256542 [2023-02-17 01:18:14,266 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1352 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 6169 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 7063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 6169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:18:14,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 897 Invalid, 7063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 6169 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-02-17 01:18:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2023-02-17 01:18:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1103. [2023-02-17 01:18:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 1.4047186932849365) internal successors, (1548), 1102 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1548 transitions. [2023-02-17 01:18:14,946 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1548 transitions. Word has length 37 [2023-02-17 01:18:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:18:14,946 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1548 transitions. [2023-02-17 01:18:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1548 transitions. [2023-02-17 01:18:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 01:18:14,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:18:14,948 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:18:14,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-17 01:18:15,148 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 [2023-02-17 01:18:15,148 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:18:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:18:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1262752116, now seen corresponding path program 8 times [2023-02-17 01:18:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:18:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158117413] [2023-02-17 01:18:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:18:15,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:18:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:18:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 01:18:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:18:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158117413] [2023-02-17 01:18:15,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158117413] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:18:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967268414] [2023-02-17 01:18:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:18:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:18:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:18:15,381 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) [2023-02-17 01:18:15,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-17 01:18:15,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:18:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:18:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-17 01:18:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:18:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 01:18:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:18:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-17 01:18:15,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967268414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:18:15,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:18:15,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 8] total 28 [2023-02-17 01:18:15,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878533281] [2023-02-17 01:18:15,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:18:15,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 01:18:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:18:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 01:18:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-02-17 01:18:15,742 INFO L87 Difference]: Start difference. First operand 1103 states and 1548 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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) [2023-02-17 01:18:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:18:18,752 INFO L93 Difference]: Finished difference Result 1723 states and 2524 transitions. [2023-02-17 01:18:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-17 01:18:18,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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 37 [2023-02-17 01:18:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:18:18,755 INFO L225 Difference]: With dead ends: 1723 [2023-02-17 01:18:18,756 INFO L226 Difference]: Without dead ends: 1443 [2023-02-17 01:18:18,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=482, Invalid=6324, Unknown=0, NotChecked=0, Total=6806 [2023-02-17 01:18:18,757 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 139 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:18:18,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1366 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 01:18:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2023-02-17 01:18:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1025. [2023-02-17 01:18:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.3994140625) internal successors, (1433), 1024 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1433 transitions. [2023-02-17 01:18:19,470 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1433 transitions. Word has length 37 [2023-02-17 01:18:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:18:19,470 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1433 transitions. [2023-02-17 01:18:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 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) [2023-02-17 01:18:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1433 transitions. [2023-02-17 01:18:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 01:18:19,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:18:19,472 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:18:19,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-17 01:18:19,677 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 [2023-02-17 01:18:19,677 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:18:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:18:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1506070490, now seen corresponding path program 9 times [2023-02-17 01:18:19,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:18:19,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972497720] [2023-02-17 01:18:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:18:19,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:18:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:18:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 01:18:19,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:18:19,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972497720] [2023-02-17 01:18:19,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972497720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:18:19,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813464025] [2023-02-17 01:18:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:18:19,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:18:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:18:19,897 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) [2023-02-17 01:18:19,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-17 01:18:20,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 01:18:20,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:18:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 01:18:20,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:18:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 01:18:20,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:18:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 01:18:20,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813464025] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:18:20,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:18:20,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-02-17 01:18:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245052477] [2023-02-17 01:18:20,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:18:20,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:18:20,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:18:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:18:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:18:20,266 INFO L87 Difference]: Start difference. First operand 1025 states and 1433 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) [2023-02-17 01:18:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:18:26,496 INFO L93 Difference]: Finished difference Result 2283 states and 3043 transitions. [2023-02-17 01:18:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-17 01:18:26,497 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 38 [2023-02-17 01:18:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:18:26,502 INFO L225 Difference]: With dead ends: 2283 [2023-02-17 01:18:26,502 INFO L226 Difference]: Without dead ends: 2152 [2023-02-17 01:18:26,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 01:18:26,503 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 231 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:18:26,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 312 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 01:18:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2023-02-17 01:18:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1048. [2023-02-17 01:18:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.396370582617001) internal successors, (1462), 1047 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1462 transitions. [2023-02-17 01:18:27,200 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1462 transitions. Word has length 38 [2023-02-17 01:18:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:18:27,200 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1462 transitions. [2023-02-17 01:18:27,200 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) [2023-02-17 01:18:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1462 transitions. [2023-02-17 01:18:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 01:18:27,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:18:27,202 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:18:27,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-17 01:18:27,408 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 [2023-02-17 01:18:27,408 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:18:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:18:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -397409032, now seen corresponding path program 10 times [2023-02-17 01:18:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:18:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815536091] [2023-02-17 01:18:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:18:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:18:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:18:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 01:18:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:18:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815536091] [2023-02-17 01:18:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815536091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:18:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259872771] [2023-02-17 01:18:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:18:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:18:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:18:27,661 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) [2023-02-17 01:18:27,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-17 01:18:27,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:18:27,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:18:27,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 01:18:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:18:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 01:18:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:18:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-17 01:18:27,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259872771] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:18:27,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:18:27,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2023-02-17 01:18:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177533541] [2023-02-17 01:18:27,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:18:27,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 01:18:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:18:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 01:18:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:18:27,949 INFO L87 Difference]: Start difference. First operand 1048 states and 1462 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:18:30,207 INFO L93 Difference]: Finished difference Result 1849 states and 2757 transitions. [2023-02-17 01:18:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-17 01:18:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 38 [2023-02-17 01:18:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:18:30,214 INFO L225 Difference]: With dead ends: 1849 [2023-02-17 01:18:30,214 INFO L226 Difference]: Without dead ends: 1526 [2023-02-17 01:18:30,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 01:18:30,215 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 285 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:18:30,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1215 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 01:18:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2023-02-17 01:18:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1021. [2023-02-17 01:18:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 1.4009803921568627) internal successors, (1429), 1020 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1429 transitions. [2023-02-17 01:18:31,007 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1429 transitions. Word has length 38 [2023-02-17 01:18:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:18:31,007 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1429 transitions. [2023-02-17 01:18:31,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:18:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1429 transitions. [2023-02-17 01:18:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 01:18:31,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:18:31,009 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:18:31,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-17 01:18:31,214 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 [2023-02-17 01:18:31,215 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:18:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:18:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 924657721, now seen corresponding path program 7 times [2023-02-17 01:18:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:18:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786594598] [2023-02-17 01:18:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:18:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:18:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:18:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-17 01:18:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:18:31,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786594598] [2023-02-17 01:18:31,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786594598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:18:31,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464137711] [2023-02-17 01:18:31,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 01:18:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:18:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:18:31,455 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) [2023-02-17 01:18:31,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-17 01:18:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:18:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 01:18:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:18:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-17 01:18:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:18:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-17 01:18:31,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464137711] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:18:31,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 01:18:31,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-17 01:18:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058494999] [2023-02-17 01:18:31,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 01:18:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 01:18:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:18:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 01:18:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2023-02-17 01:18:31,687 INFO L87 Difference]: Start difference. First operand 1021 states and 1429 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)