./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 21:55:08,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 21:55:08,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 21:55:08,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 21:55:08,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 21:55:08,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 21:55:08,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 21:55:08,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 21:55:08,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 21:55:08,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 21:55:08,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 21:55:08,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 21:55:08,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 21:55:08,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 21:55:08,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 21:55:08,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 21:55:08,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 21:55:08,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 21:55:08,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 21:55:08,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 21:55:08,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 21:55:08,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 21:55:08,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 21:55:08,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 21:55:08,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 21:55:08,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 21:55:08,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 21:55:08,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 21:55:08,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 21:55:08,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 21:55:08,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 21:55:08,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 21:55:08,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 21:55:08,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 21:55:08,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 21:55:08,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 21:55:08,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 21:55:08,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 21:55:08,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 21:55:08,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 21:55:08,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 21:55:08,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 21:55:08,306 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 21:55:08,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 21:55:08,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 21:55:08,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 21:55:08,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 21:55:08,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 21:55:08,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 21:55:08,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 21:55:08,308 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 21:55:08,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 21:55:08,309 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 21:55:08,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 21:55:08,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 21:55:08,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 21:55:08,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 21:55:08,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 21:55:08,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 21:55:08,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 21:55:08,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:08,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 21:55:08,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 21:55:08,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 21:55:08,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 21:55:08,313 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 21:55:08,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-02-13 21:55:08,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 21:55:08,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 21:55:08,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 21:55:08,513 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 21:55:08,513 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 21:55:08,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-13 21:55:09,512 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 21:55:09,702 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 21:55:09,702 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-13 21:55:09,710 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d005cd7/7c45a8f24dac4d6f975adb32253de9e3/FLAG089dfbb3a [2023-02-13 21:55:09,720 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d005cd7/7c45a8f24dac4d6f975adb32253de9e3 [2023-02-13 21:55:09,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 21:55:09,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 21:55:09,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 21:55:09,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 21:55:09,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e067df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09, skipping insertion in model container [2023-02-13 21:55:09,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 21:55:09,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 21:55:09,850 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/array-examples/relax-2-2.i[982,995] [2023-02-13 21:55:09,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:09,970 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 21:55:09,980 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/array-examples/relax-2-2.i[982,995] [2023-02-13 21:55:10,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:10,037 INFO L208 MainTranslator]: Completed translation [2023-02-13 21:55:10,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10 WrapperNode [2023-02-13 21:55:10,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:10,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 21:55:10,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 21:55:10,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,083 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2023-02-13 21:55:10,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 21:55:10,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 21:55:10,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 21:55:10,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 21:55:10,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 21:55:10,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:10,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:10,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-13 21:55:10,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-13 21:55:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 21:55:10,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 21:55:10,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-13 21:55:10,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 21:55:10,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 21:55:10,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 21:55:10,236 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 21:55:10,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 21:55:10,619 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 21:55:10,623 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 21:55:10,623 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-13 21:55:10,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10 BoogieIcfgContainer [2023-02-13 21:55:10,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 21:55:10,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 21:55:10,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 21:55:10,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 21:55:10,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 09:55:09" (1/3) ... [2023-02-13 21:55:10,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77dc1f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (2/3) ... [2023-02-13 21:55:10,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77dc1f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10" (3/3) ... [2023-02-13 21:55:10,652 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-02-13 21:55:10,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 21:55:10,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 21:55:10,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 21:55:10,780 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;@71442521, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 21:55:10,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 21:55:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-13 21:55:10,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2023-02-13 21:55:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169586806] [2023-02-13 21:55:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:10,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169586806] [2023-02-13 21:55:10,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169586806] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:10,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:10,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 21:55:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949320848] [2023-02-13 21:55:10,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 21:55:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 21:55:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 21:55:11,021 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 21:55:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,041 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2023-02-13 21:55:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 21:55:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-13 21:55:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,048 INFO L225 Difference]: With dead ends: 105 [2023-02-13 21:55:11,048 INFO L226 Difference]: Without dead ends: 50 [2023-02-13 21:55:11,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 21:55:11,053 INFO L413 NwaCegarLoop]: 75 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, 75 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 [2023-02-13 21:55:11,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-13 21:55:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-13 21:55:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2023-02-13 21:55:11,077 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2023-02-13 21:55:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,077 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2023-02-13 21:55:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 21:55:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2023-02-13 21:55:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-13 21:55:11,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 21:55:11,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2023-02-13 21:55:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687631138] [2023-02-13 21:55:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687631138] [2023-02-13 21:55:11,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687631138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:11,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197795136] [2023-02-13 21:55:11,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:11,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:11,225 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,260 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-02-13 21:55:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:11,261 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-13 21:55:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,262 INFO L225 Difference]: With dead ends: 83 [2023-02-13 21:55:11,262 INFO L226 Difference]: Without dead ends: 58 [2023-02-13 21:55:11,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:11,263 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-13 21:55:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-13 21:55:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2023-02-13 21:55:11,270 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2023-02-13 21:55:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,271 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2023-02-13 21:55:11,271 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2023-02-13 21:55:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-13 21:55:11,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 21:55:11,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2023-02-13 21:55:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375324683] [2023-02-13 21:55:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:11,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375324683] [2023-02-13 21:55:11,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375324683] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 21:55:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501990703] [2023-02-13 21:55:11,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 21:55:11,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 21:55:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 21:55:11,495 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,595 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-02-13 21:55:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 21:55:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-13 21:55:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,596 INFO L225 Difference]: With dead ends: 108 [2023-02-13 21:55:11,596 INFO L226 Difference]: Without dead ends: 72 [2023-02-13 21:55:11,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-13 21:55:11,600 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-13 21:55:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-02-13 21:55:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-02-13 21:55:11,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-02-13 21:55:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,612 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-02-13 21:55:11,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-02-13 21:55:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-13 21:55:11,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 21:55:11,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2023-02-13 21:55:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731584881] [2023-02-13 21:55:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:11,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731584881] [2023-02-13 21:55:11,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731584881] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 21:55:11,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253591864] [2023-02-13 21:55:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:11,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,986 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,159 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2023-02-13 21:55:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 21:55:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-02-13 21:55:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,161 INFO L225 Difference]: With dead ends: 110 [2023-02-13 21:55:12,161 INFO L226 Difference]: Without dead ends: 98 [2023-02-13 21:55:12,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-13 21:55:12,162 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-13 21:55:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2023-02-13 21:55:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2023-02-13 21:55:12,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2023-02-13 21:55:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,172 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2023-02-13 21:55:12,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2023-02-13 21:55:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-13 21:55:12,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 21:55:12,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2023-02-13 21:55:12,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420722154] [2023-02-13 21:55:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:12,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420722154] [2023-02-13 21:55:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420722154] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109555532] [2023-02-13 21:55:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:12,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 21:55:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-13 21:55:12,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:12,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:12,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109555532] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:12,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-02-13 21:55:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442478051] [2023-02-13 21:55:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 21:55:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 21:55:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-13 21:55:12,601 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,680 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2023-02-13 21:55:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-02-13 21:55:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,681 INFO L225 Difference]: With dead ends: 88 [2023-02-13 21:55:12,682 INFO L226 Difference]: Without dead ends: 86 [2023-02-13 21:55:12,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-13 21:55:12,683 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-13 21:55:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-13 21:55:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-02-13 21:55:12,692 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2023-02-13 21:55:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,692 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-02-13 21:55:12,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-02-13 21:55:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 21:55:12,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2023-02-13 21:55:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912009405] [2023-02-13 21:55:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912009405] [2023-02-13 21:55:12,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912009405] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:12,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196775475] [2023-02-13 21:55:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,991 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,008 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2023-02-13 21:55:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-13 21:55:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,009 INFO L225 Difference]: With dead ends: 97 [2023-02-13 21:55:13,009 INFO L226 Difference]: Without dead ends: 79 [2023-02-13 21:55:13,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:13,010 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-13 21:55:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-13 21:55:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-02-13 21:55:13,028 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2023-02-13 21:55:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,028 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-02-13 21:55:13,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-02-13 21:55:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 21:55:13,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 21:55:13,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2023-02-13 21:55:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504260178] [2023-02-13 21:55:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504260178] [2023-02-13 21:55:13,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504260178] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:13,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:13,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 21:55:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029344395] [2023-02-13 21:55:13,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 21:55:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 21:55:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:13,164 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,216 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2023-02-13 21:55:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 21:55:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-13 21:55:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,217 INFO L225 Difference]: With dead ends: 90 [2023-02-13 21:55:13,217 INFO L226 Difference]: Without dead ends: 58 [2023-02-13 21:55:13,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:13,221 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-13 21:55:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-13 21:55:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-13 21:55:13,234 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-02-13 21:55:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,234 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-13 21:55:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-02-13 21:55:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 21:55:13,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-13 21:55:13,237 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2023-02-13 21:55:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022772724] [2023-02-13 21:55:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022772724] [2023-02-13 21:55:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022772724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162412948] [2023-02-13 21:55:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 21:55:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:13,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:13,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162412948] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:13,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:13,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-13 21:55:13,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847962838] [2023-02-13 21:55:13,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:13,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-13 21:55:13,575 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,631 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-02-13 21:55:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-13 21:55:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,632 INFO L225 Difference]: With dead ends: 71 [2023-02-13 21:55:13,632 INFO L226 Difference]: Without dead ends: 57 [2023-02-13 21:55:13,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-13 21:55:13,633 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-13 21:55:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-13 21:55:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-02-13 21:55:13,638 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2023-02-13 21:55:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,638 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-02-13 21:55:13,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-02-13 21:55:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 21:55:13,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:13,843 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,SelfDestructingSolverStorable7 [2023-02-13 21:55:13,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2023-02-13 21:55:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891960945] [2023-02-13 21:55:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:13,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891960945] [2023-02-13 21:55:13,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891960945] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:13,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:13,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218803950] [2023-02-13 21:55:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:13,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:13,900 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,912 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-02-13 21:55:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:13,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-02-13 21:55:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,918 INFO L225 Difference]: With dead ends: 93 [2023-02-13 21:55:13,918 INFO L226 Difference]: Without dead ends: 79 [2023-02-13 21:55:13,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:13,919 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-13 21:55:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2023-02-13 21:55:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2023-02-13 21:55:13,937 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2023-02-13 21:55:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,938 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2023-02-13 21:55:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2023-02-13 21:55:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-13 21:55:13,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-13 21:55:13,939 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2023-02-13 21:55:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591499621] [2023-02-13 21:55:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591499621] [2023-02-13 21:55:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591499621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358516032] [2023-02-13 21:55:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:14,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 21:55:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:14,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358516032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:14,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:14,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2023-02-13 21:55:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288164304] [2023-02-13 21:55:14,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:14,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 21:55:14,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:14,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 21:55:14,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-13 21:55:14,287 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:14,357 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2023-02-13 21:55:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-02-13 21:55:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:14,358 INFO L225 Difference]: With dead ends: 124 [2023-02-13 21:55:14,358 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 21:55:14,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:14,359 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:14,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 21:55:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-13 21:55:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-13 21:55:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-02-13 21:55:14,369 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2023-02-13 21:55:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:14,369 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-02-13 21:55:14,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-02-13 21:55:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-13 21:55:14,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:14,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:14,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2023-02-13 21:55:14,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620695262] [2023-02-13 21:55:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620695262] [2023-02-13 21:55:14,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620695262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232467287] [2023-02-13 21:55:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:14,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 21:55:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-13 21:55:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232467287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:14,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:14,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2023-02-13 21:55:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520054565] [2023-02-13 21:55:14,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-13 21:55:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-13 21:55:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-13 21:55:14,912 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:15,069 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2023-02-13 21:55:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 21:55:15,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-13 21:55:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:15,070 INFO L225 Difference]: With dead ends: 148 [2023-02-13 21:55:15,070 INFO L226 Difference]: Without dead ends: 125 [2023-02-13 21:55:15,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-02-13 21:55:15,071 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:15,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 684 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-13 21:55:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2023-02-13 21:55:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-02-13 21:55:15,079 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2023-02-13 21:55:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:15,079 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-02-13 21:55:15,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-02-13 21:55:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-13 21:55:15,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:15,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:15,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 21:55:15,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:15,284 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2023-02-13 21:55:15,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316967855] [2023-02-13 21:55:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:15,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316967855] [2023-02-13 21:55:15,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316967855] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577239320] [2023-02-13 21:55:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:15,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:15,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:15,586 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) [2023-02-13 21:55:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 21:55:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 21:55:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-13 21:55:15,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:15,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577239320] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:15,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:15,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-02-13 21:55:15,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656477340] [2023-02-13 21:55:15,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:15,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:15,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:15,693 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:15,756 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2023-02-13 21:55:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-13 21:55:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:15,757 INFO L225 Difference]: With dead ends: 127 [2023-02-13 21:55:15,757 INFO L226 Difference]: Without dead ends: 113 [2023-02-13 21:55:15,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-13 21:55:15,758 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:15,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-13 21:55:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2023-02-13 21:55:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2023-02-13 21:55:15,766 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2023-02-13 21:55:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:15,766 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2023-02-13 21:55:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2023-02-13 21:55:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 21:55:15,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:15,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:15,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:15,971 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,SelfDestructingSolverStorable11 [2023-02-13 21:55:15,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2023-02-13 21:55:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637389296] [2023-02-13 21:55:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-13 21:55:16,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637389296] [2023-02-13 21:55:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637389296] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910168142] [2023-02-13 21:55:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:16,098 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) [2023-02-13 21:55:16,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 21:55:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 21:55:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:55:16,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910168142] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:16,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:16,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2023-02-13 21:55:16,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662443419] [2023-02-13 21:55:16,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:16,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 21:55:16,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 21:55:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-13 21:55:16,320 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:16,635 INFO L93 Difference]: Finished difference Result 269 states and 362 transitions. [2023-02-13 21:55:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 21:55:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-02-13 21:55:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:16,636 INFO L225 Difference]: With dead ends: 269 [2023-02-13 21:55:16,636 INFO L226 Difference]: Without dead ends: 192 [2023-02-13 21:55:16,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:16,637 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 437 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:16,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 622 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-13 21:55:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2023-02-13 21:55:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.3) internal successors, (143), 111 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2023-02-13 21:55:16,650 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 38 [2023-02-13 21:55:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:16,650 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2023-02-13 21:55:16,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2023-02-13 21:55:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 21:55:16,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:16,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:16,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-13 21:55:16,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:16,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2023-02-13 21:55:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:16,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453870332] [2023-02-13 21:55:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 21:55:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453870332] [2023-02-13 21:55:16,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453870332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470281351] [2023-02-13 21:55:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:16,967 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) [2023-02-13 21:55:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 21:55:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-13 21:55:17,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-13 21:55:17,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470281351] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:17,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:17,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-13 21:55:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575917622] [2023-02-13 21:55:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 21:55:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 21:55:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-13 21:55:17,112 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 21:55:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:17,200 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2023-02-13 21:55:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:17,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-13 21:55:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:17,201 INFO L225 Difference]: With dead ends: 167 [2023-02-13 21:55:17,201 INFO L226 Difference]: Without dead ends: 132 [2023-02-13 21:55:17,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-02-13 21:55:17,202 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:17,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-13 21:55:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2023-02-13 21:55:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 113 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2023-02-13 21:55:17,214 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 42 [2023-02-13 21:55:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:17,214 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2023-02-13 21:55:17,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 21:55:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2023-02-13 21:55:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 21:55:17,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:17,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:17,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-13 21:55:17,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:17,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2023-02-13 21:55:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619274852] [2023-02-13 21:55:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:17,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-13 21:55:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:17,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619274852] [2023-02-13 21:55:17,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619274852] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091132653] [2023-02-13 21:55:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:17,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:17,524 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) [2023-02-13 21:55:17,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 21:55:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-13 21:55:17,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:17,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-13 21:55:17,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091132653] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:17,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:17,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-02-13 21:55:17,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222375721] [2023-02-13 21:55:17,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:17,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-13 21:55:17,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-13 21:55:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-13 21:55:17,849 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:18,642 INFO L93 Difference]: Finished difference Result 350 states and 484 transitions. [2023-02-13 21:55:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 21:55:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-13 21:55:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:18,644 INFO L225 Difference]: With dead ends: 350 [2023-02-13 21:55:18,644 INFO L226 Difference]: Without dead ends: 320 [2023-02-13 21:55:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2023-02-13 21:55:18,645 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 534 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1260 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 21:55:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-13 21:55:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 166. [2023-02-13 21:55:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 155 states have internal predecessors, (205), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2023-02-13 21:55:18,663 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 42 [2023-02-13 21:55:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:18,663 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2023-02-13 21:55:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2023-02-13 21:55:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 21:55:18,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:18,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:18,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:18,868 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,SelfDestructingSolverStorable14 [2023-02-13 21:55:18,869 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:18,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2023-02-13 21:55:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160670544] [2023-02-13 21:55:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:19,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:19,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160670544] [2023-02-13 21:55:19,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160670544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653841787] [2023-02-13 21:55:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:19,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:19,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:19,287 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) [2023-02-13 21:55:19,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 21:55:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-13 21:55:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:19,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 21:55:19,625 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:19,625 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:19,632 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-13 21:55:19,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-02-13 21:55:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:19,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:19,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653841787] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:19,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-13 21:55:19,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2023-02-13 21:55:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024369543] [2023-02-13 21:55:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:19,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-13 21:55:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-13 21:55:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:55:19,856 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:20,213 INFO L93 Difference]: Finished difference Result 297 states and 404 transitions. [2023-02-13 21:55:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 21:55:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-13 21:55:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:20,215 INFO L225 Difference]: With dead ends: 297 [2023-02-13 21:55:20,215 INFO L226 Difference]: Without dead ends: 288 [2023-02-13 21:55:20,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2023-02-13 21:55:20,216 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 117 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:20,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 676 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-13 21:55:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2023-02-13 21:55:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 195 states have (on average 1.353846153846154) internal successors, (264), 196 states have internal predecessors, (264), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 279 transitions. [2023-02-13 21:55:20,241 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 279 transitions. Word has length 42 [2023-02-13 21:55:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:20,242 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 279 transitions. [2023-02-13 21:55:20,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 279 transitions. [2023-02-13 21:55:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-13 21:55:20,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:20,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:20,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:20,447 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,SelfDestructingSolverStorable15 [2023-02-13 21:55:20,448 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1797758865, now seen corresponding path program 1 times [2023-02-13 21:55:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346433474] [2023-02-13 21:55:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:20,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:20,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:20,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346433474] [2023-02-13 21:55:20,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346433474] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866770161] [2023-02-13 21:55:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:20,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:20,666 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) [2023-02-13 21:55:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 21:55:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 21:55:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:20,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866770161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:20,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:20,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-02-13 21:55:20,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575361870] [2023-02-13 21:55:20,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 21:55:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 21:55:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-13 21:55:20,876 INFO L87 Difference]: Start difference. First operand 207 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:21,085 INFO L93 Difference]: Finished difference Result 258 states and 342 transitions. [2023-02-13 21:55:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 21:55:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-13 21:55:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:21,086 INFO L225 Difference]: With dead ends: 258 [2023-02-13 21:55:21,086 INFO L226 Difference]: Without dead ends: 182 [2023-02-13 21:55:21,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:55:21,087 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 173 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:21,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 648 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-13 21:55:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2023-02-13 21:55:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.321917808219178) internal successors, (193), 147 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2023-02-13 21:55:21,106 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 43 [2023-02-13 21:55:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:21,106 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2023-02-13 21:55:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2023-02-13 21:55:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 21:55:21,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:21,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:21,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:21,311 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,SelfDestructingSolverStorable16 [2023-02-13 21:55:21,312 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2052626821, now seen corresponding path program 1 times [2023-02-13 21:55:21,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:21,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103526488] [2023-02-13 21:55:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 21:55:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-13 21:55:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103526488] [2023-02-13 21:55:21,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103526488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280197832] [2023-02-13 21:55:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:21,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:21,445 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) [2023-02-13 21:55:21,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 21:55:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-13 21:55:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-13 21:55:21,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280197832] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:21,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:21,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-02-13 21:55:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081151283] [2023-02-13 21:55:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-13 21:55:21,529 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:21,558 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2023-02-13 21:55:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-13 21:55:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:21,560 INFO L225 Difference]: With dead ends: 188 [2023-02-13 21:55:21,560 INFO L226 Difference]: Without dead ends: 167 [2023-02-13 21:55:21,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-13 21:55:21,560 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:21,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-13 21:55:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2023-02-13 21:55:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 151 states have internal predecessors, (199), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2023-02-13 21:55:21,579 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 45 [2023-02-13 21:55:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:21,579 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2023-02-13 21:55:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2023-02-13 21:55:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 21:55:21,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:21,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:21,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:21,784 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,SelfDestructingSolverStorable17 [2023-02-13 21:55:21,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2023-02-13 21:55:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:21,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111514239] [2023-02-13 21:55:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:22,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:22,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-13 21:55:22,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:22,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111514239] [2023-02-13 21:55:22,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111514239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:22,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253584267] [2023-02-13 21:55:22,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:22,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:22,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:22,157 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) [2023-02-13 21:55:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 21:55:22,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-13 21:55:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:22,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:22,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253584267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:22,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:22,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2023-02-13 21:55:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379143077] [2023-02-13 21:55:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:22,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 21:55:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 21:55:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-02-13 21:55:22,549 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:24,036 INFO L93 Difference]: Finished difference Result 661 states and 912 transitions. [2023-02-13 21:55:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-13 21:55:24,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-13 21:55:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:24,038 INFO L225 Difference]: With dead ends: 661 [2023-02-13 21:55:24,038 INFO L226 Difference]: Without dead ends: 551 [2023-02-13 21:55:24,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2023-02-13 21:55:24,040 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 768 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:24,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1346 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 21:55:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-02-13 21:55:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 236. [2023-02-13 21:55:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.34375) internal successors, (301), 225 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2023-02-13 21:55:24,071 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 45 [2023-02-13 21:55:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:24,072 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2023-02-13 21:55:24,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2023-02-13 21:55:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-13 21:55:24,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:24,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:24,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:24,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:24,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:24,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2023-02-13 21:55:24,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:24,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846235550] [2023-02-13 21:55:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:24,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:25,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-13 21:55:25,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:25,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846235550] [2023-02-13 21:55:25,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846235550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:25,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551639861] [2023-02-13 21:55:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:25,133 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) [2023-02-13 21:55:25,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 21:55:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-13 21:55:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:25,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:55:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:55:25,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:25,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:25,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:55:25,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 42 [2023-02-13 21:55:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:25,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:25,802 INFO L321 Elim1Store]: treesize reduction 17, result has 83.0 percent of original size [2023-02-13 21:55:25,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2023-02-13 21:55:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 21:55:26,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551639861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:26,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:26,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 33 [2023-02-13 21:55:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981054776] [2023-02-13 21:55:26,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-13 21:55:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-13 21:55:26,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 21:55:26,226 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:27,975 INFO L93 Difference]: Finished difference Result 587 states and 796 transitions. [2023-02-13 21:55:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-13 21:55:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-13 21:55:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:27,977 INFO L225 Difference]: With dead ends: 587 [2023-02-13 21:55:27,977 INFO L226 Difference]: Without dead ends: 455 [2023-02-13 21:55:27,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2023-02-13 21:55:27,978 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 383 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:27,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1966 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 21:55:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-13 21:55:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 260. [2023-02-13 21:55:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 248 states have (on average 1.3346774193548387) internal successors, (331), 249 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2023-02-13 21:55:28,021 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 48 [2023-02-13 21:55:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2023-02-13 21:55:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2023-02-13 21:55:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-13 21:55:28,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:28,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:28,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:28,226 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,SelfDestructingSolverStorable19 [2023-02-13 21:55:28,227 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2023-02-13 21:55:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569113929] [2023-02-13 21:55:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:28,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569113929] [2023-02-13 21:55:28,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569113929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760545321] [2023-02-13 21:55:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:28,853 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) [2023-02-13 21:55:28,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 21:55:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-13 21:55:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:29,105 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-13 21:55:29,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-02-13 21:55:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:29,301 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2023-02-13 21:55:29,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2023-02-13 21:55:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760545321] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:29,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:29,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-02-13 21:55:29,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775034219] [2023-02-13 21:55:29,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:29,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-13 21:55:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-13 21:55:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-02-13 21:55:29,477 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:29,955 INFO L93 Difference]: Finished difference Result 487 states and 655 transitions. [2023-02-13 21:55:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 21:55:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-13 21:55:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:29,957 INFO L225 Difference]: With dead ends: 487 [2023-02-13 21:55:29,957 INFO L226 Difference]: Without dead ends: 355 [2023-02-13 21:55:29,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 21:55:29,959 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 244 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:29,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 982 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:55:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-13 21:55:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2023-02-13 21:55:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 231 states have (on average 1.303030303030303) internal successors, (301), 232 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2023-02-13 21:55:30,001 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 48 [2023-02-13 21:55:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:30,001 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2023-02-13 21:55:30,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2023-02-13 21:55:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-13 21:55:30,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:30,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:30,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-13 21:55:30,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:30,208 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1737037141, now seen corresponding path program 1 times [2023-02-13 21:55:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:30,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022375963] [2023-02-13 21:55:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 21:55:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-13 21:55:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022375963] [2023-02-13 21:55:30,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022375963] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:30,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:30,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119444009] [2023-02-13 21:55:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:30,245 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:30,300 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2023-02-13 21:55:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-13 21:55:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:30,302 INFO L225 Difference]: With dead ends: 266 [2023-02-13 21:55:30,302 INFO L226 Difference]: Without dead ends: 244 [2023-02-13 21:55:30,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:30,303 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:30,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-13 21:55:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2023-02-13 21:55:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 231 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2023-02-13 21:55:30,340 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 50 [2023-02-13 21:55:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:30,340 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2023-02-13 21:55:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2023-02-13 21:55:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-13 21:55:30,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:30,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:30,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-13 21:55:30,343 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -23820843, now seen corresponding path program 1 times [2023-02-13 21:55:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140092757] [2023-02-13 21:55:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-13 21:55:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140092757] [2023-02-13 21:55:30,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140092757] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106055189] [2023-02-13 21:55:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:30,521 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) [2023-02-13 21:55:30,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 21:55:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-13 21:55:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:30,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:30,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106055189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:30,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:30,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-02-13 21:55:30,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076786424] [2023-02-13 21:55:30,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 21:55:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 21:55:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-02-13 21:55:30,961 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:32,519 INFO L93 Difference]: Finished difference Result 689 states and 913 transitions. [2023-02-13 21:55:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-13 21:55:32,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-13 21:55:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:32,521 INFO L225 Difference]: With dead ends: 689 [2023-02-13 21:55:32,521 INFO L226 Difference]: Without dead ends: 681 [2023-02-13 21:55:32,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2023-02-13 21:55:32,523 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1733 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:32,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 1788 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:55:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-02-13 21:55:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 245. [2023-02-13 21:55:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 234 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 316 transitions. [2023-02-13 21:55:32,587 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 316 transitions. Word has length 49 [2023-02-13 21:55:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:32,587 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 316 transitions. [2023-02-13 21:55:32,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 316 transitions. [2023-02-13 21:55:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-13 21:55:32,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:32,588 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:32,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:32,793 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2023-02-13 21:55:32,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:32,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068017366] [2023-02-13 21:55:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:32,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068017366] [2023-02-13 21:55:33,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068017366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613991957] [2023-02-13 21:55:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:33,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:33,017 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) [2023-02-13 21:55:33,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 21:55:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 21:55:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:33,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613991957] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:33,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:33,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-02-13 21:55:33,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640248911] [2023-02-13 21:55:33,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-13 21:55:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-13 21:55:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:55:33,328 INFO L87 Difference]: Start difference. First operand 245 states and 316 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:34,382 INFO L93 Difference]: Finished difference Result 727 states and 955 transitions. [2023-02-13 21:55:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-13 21:55:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-13 21:55:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:34,384 INFO L225 Difference]: With dead ends: 727 [2023-02-13 21:55:34,384 INFO L226 Difference]: Without dead ends: 565 [2023-02-13 21:55:34,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2023-02-13 21:55:34,385 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1071 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:34,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1564 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:55:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-02-13 21:55:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 273. [2023-02-13 21:55:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 262 states have internal predecessors, (340), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 355 transitions. [2023-02-13 21:55:34,448 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 355 transitions. Word has length 51 [2023-02-13 21:55:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:34,448 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 355 transitions. [2023-02-13 21:55:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 355 transitions. [2023-02-13 21:55:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-13 21:55:34,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:34,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:34,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-13 21:55:34,654 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash -175162644, now seen corresponding path program 1 times [2023-02-13 21:55:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:34,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254059312] [2023-02-13 21:55:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-13 21:55:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-13 21:55:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 21:55:34,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:34,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254059312] [2023-02-13 21:55:34,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254059312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:34,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341639637] [2023-02-13 21:55:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:34,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:34,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:34,778 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) [2023-02-13 21:55:34,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 21:55:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 21:55:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:34,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:35,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341639637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:35,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:35,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-13 21:55:35,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840230342] [2023-02-13 21:55:35,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:35,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 21:55:35,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 21:55:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-13 21:55:35,011 INFO L87 Difference]: Start difference. First operand 273 states and 355 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-13 21:55:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:35,316 INFO L93 Difference]: Finished difference Result 331 states and 427 transitions. [2023-02-13 21:55:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 21:55:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2023-02-13 21:55:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:35,317 INFO L225 Difference]: With dead ends: 331 [2023-02-13 21:55:35,317 INFO L226 Difference]: Without dead ends: 281 [2023-02-13 21:55:35,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:55:35,318 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:35,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 677 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-13 21:55:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2023-02-13 21:55:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 258 states have (on average 1.302325581395349) internal successors, (336), 259 states have internal predecessors, (336), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-13 21:55:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2023-02-13 21:55:35,376 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 54 [2023-02-13 21:55:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:35,376 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2023-02-13 21:55:35,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-13 21:55:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2023-02-13 21:55:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-13 21:55:35,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:35,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:35,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:35,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:35,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1379742433, now seen corresponding path program 2 times [2023-02-13 21:55:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479473916] [2023-02-13 21:55:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:55:36,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479473916] [2023-02-13 21:55:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479473916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407062157] [2023-02-13 21:55:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:36,327 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) [2023-02-13 21:55:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 21:55:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-13 21:55:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:36,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 21:55:36,773 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2023-02-13 21:55:36,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 70 [2023-02-13 21:55:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:36,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407062157] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:37,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:37,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 40 [2023-02-13 21:55:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435577182] [2023-02-13 21:55:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-13 21:55:37,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-13 21:55:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2023-02-13 21:55:37,174 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:38,298 INFO L93 Difference]: Finished difference Result 574 states and 769 transitions. [2023-02-13 21:55:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 21:55:38,299 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-13 21:55:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:38,300 INFO L225 Difference]: With dead ends: 574 [2023-02-13 21:55:38,300 INFO L226 Difference]: Without dead ends: 513 [2023-02-13 21:55:38,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2023-02-13 21:55:38,302 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 377 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:38,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1640 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 21:55:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-13 21:55:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2023-02-13 21:55:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.3097643097643097) internal successors, (389), 298 states have internal predecessors, (389), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-13 21:55:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2023-02-13 21:55:38,374 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 52 [2023-02-13 21:55:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:38,374 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2023-02-13 21:55:38,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:55:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2023-02-13 21:55:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-13 21:55:38,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:38,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:38,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-13 21:55:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:38,580 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1170436455, now seen corresponding path program 2 times [2023-02-13 21:55:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279371806] [2023-02-13 21:55:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-13 21:55:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279371806] [2023-02-13 21:55:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279371806] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871884684] [2023-02-13 21:55:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:38,793 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) [2023-02-13 21:55:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-13 21:55:38,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:38,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 21:55:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-13 21:55:38,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-13 21:55:39,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871884684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:39,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:39,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-02-13 21:55:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918703160] [2023-02-13 21:55:39,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-13 21:55:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-13 21:55:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:55:39,113 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:39,525 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2023-02-13 21:55:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-13 21:55:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-13 21:55:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:39,527 INFO L225 Difference]: With dead ends: 424 [2023-02-13 21:55:39,527 INFO L226 Difference]: Without dead ends: 329 [2023-02-13 21:55:39,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-02-13 21:55:39,528 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 406 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:39,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 965 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-13 21:55:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 252. [2023-02-13 21:55:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 239 states have (on average 1.292887029288703) internal successors, (309), 240 states have internal predecessors, (309), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-13 21:55:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 326 transitions. [2023-02-13 21:55:39,586 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 326 transitions. Word has length 53 [2023-02-13 21:55:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:39,587 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 326 transitions. [2023-02-13 21:55:39,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 326 transitions. [2023-02-13 21:55:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-13 21:55:39,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:39,588 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:39,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-13 21:55:39,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:39,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash -610707989, now seen corresponding path program 3 times [2023-02-13 21:55:39,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369479936] [2023-02-13 21:55:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:39,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-13 21:55:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:39,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369479936] [2023-02-13 21:55:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369479936] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21130596] [2023-02-13 21:55:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:39,913 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) [2023-02-13 21:55:39,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-13 21:55:40,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-13 21:55:40,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 21:55:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:40,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:40,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21130596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:40,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:40,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-13 21:55:40,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54452678] [2023-02-13 21:55:40,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:40,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-13 21:55:40,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-13 21:55:40,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-02-13 21:55:40,421 INFO L87 Difference]: Start difference. First operand 252 states and 326 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:40,797 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2023-02-13 21:55:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 21:55:40,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-13 21:55:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:40,798 INFO L225 Difference]: With dead ends: 301 [2023-02-13 21:55:40,798 INFO L226 Difference]: Without dead ends: 267 [2023-02-13 21:55:40,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-02-13 21:55:40,799 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 113 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:40,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 985 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-13 21:55:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2023-02-13 21:55:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 222 states have internal predecessors, (285), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-13 21:55:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2023-02-13 21:55:40,856 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 54 [2023-02-13 21:55:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:40,857 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2023-02-13 21:55:40,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2023-02-13 21:55:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-13 21:55:40,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:40,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:40,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:41,063 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,SelfDestructingSolverStorable27 [2023-02-13 21:55:41,063 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1409986660, now seen corresponding path program 1 times [2023-02-13 21:55:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379639425] [2023-02-13 21:55:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-13 21:55:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-13 21:55:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:41,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379639425] [2023-02-13 21:55:41,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379639425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556000798] [2023-02-13 21:55:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:41,203 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) [2023-02-13 21:55:41,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-13 21:55:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 21:55:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:55:41,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556000798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:41,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-02-13 21:55:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019550625] [2023-02-13 21:55:41,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:41,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 21:55:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 21:55:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-13 21:55:41,433 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 21:55:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:41,754 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2023-02-13 21:55:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 21:55:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-02-13 21:55:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:41,755 INFO L225 Difference]: With dead ends: 324 [2023-02-13 21:55:41,756 INFO L226 Difference]: Without dead ends: 258 [2023-02-13 21:55:41,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-02-13 21:55:41,756 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:41,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 600 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-13 21:55:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2023-02-13 21:55:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 213 states have internal predecessors, (272), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2023-02-13 21:55:41,812 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 57 [2023-02-13 21:55:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:41,813 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2023-02-13 21:55:41,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-13 21:55:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2023-02-13 21:55:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-13 21:55:41,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:41,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:41,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:42,018 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,SelfDestructingSolverStorable28 [2023-02-13 21:55:42,019 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2023-02-13 21:55:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084499448] [2023-02-13 21:55:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:42,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:42,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 21:55:42,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084499448] [2023-02-13 21:55:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084499448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041197059] [2023-02-13 21:55:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:42,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:42,324 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) [2023-02-13 21:55:42,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-13 21:55:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 21:55:42,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-13 21:55:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-13 21:55:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-13 21:55:42,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041197059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:42,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:42,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2023-02-13 21:55:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669737216] [2023-02-13 21:55:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 21:55:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 21:55:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:55:42,811 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:45,616 INFO L93 Difference]: Finished difference Result 1047 states and 1365 transitions. [2023-02-13 21:55:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-13 21:55:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-13 21:55:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:45,619 INFO L225 Difference]: With dead ends: 1047 [2023-02-13 21:55:45,619 INFO L226 Difference]: Without dead ends: 890 [2023-02-13 21:55:45,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1157, Invalid=7399, Unknown=0, NotChecked=0, Total=8556 [2023-02-13 21:55:45,627 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1843 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 2802 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:45,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1843 Valid, 2802 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 21:55:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-02-13 21:55:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 209. [2023-02-13 21:55:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.284263959390863) internal successors, (253), 198 states have internal predecessors, (253), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-13 21:55:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2023-02-13 21:55:45,685 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 55 [2023-02-13 21:55:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:45,686 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2023-02-13 21:55:45,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2023-02-13 21:55:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-13 21:55:45,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:45,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:45,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-13 21:55:45,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:45,892 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1373602884, now seen corresponding path program 1 times [2023-02-13 21:55:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909107903] [2023-02-13 21:55:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-13 21:55:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-13 21:55:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-13 21:55:46,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:46,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909107903] [2023-02-13 21:55:46,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909107903] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:46,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75198254] [2023-02-13 21:55:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:46,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:46,362 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) [2023-02-13 21:55:46,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-13 21:55:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-13 21:55:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:46,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-13 21:55:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75198254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:46,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:46,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 31 [2023-02-13 21:55:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890337484] [2023-02-13 21:55:46,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:46,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 21:55:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 21:55:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:55:46,835 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 21:55:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:49,288 INFO L93 Difference]: Finished difference Result 418 states and 535 transitions. [2023-02-13 21:55:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-13 21:55:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2023-02-13 21:55:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:49,290 INFO L225 Difference]: With dead ends: 418 [2023-02-13 21:55:49,290 INFO L226 Difference]: Without dead ends: 311 [2023-02-13 21:55:49,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=949, Invalid=4453, Unknown=0, NotChecked=0, Total=5402 [2023-02-13 21:55:49,291 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 785 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:49,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 850 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 21:55:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-13 21:55:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2023-02-13 21:55:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-13 21:55:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2023-02-13 21:55:49,359 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 59 [2023-02-13 21:55:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:49,360 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2023-02-13 21:55:49,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 21:55:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2023-02-13 21:55:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-13 21:55:49,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:49,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:49,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-13 21:55:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:49,566 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2023-02-13 21:55:49,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807939142] [2023-02-13 21:55:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:50,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:50,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:50,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807939142] [2023-02-13 21:55:50,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807939142] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:50,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725018719] [2023-02-13 21:55:50,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:55:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:50,380 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) [2023-02-13 21:55:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-13 21:55:50,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:55:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:50,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-13 21:55:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:55:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:55:50,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:55:50,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:55:50,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2023-02-13 21:55:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-13 21:55:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:51,188 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-13 21:55:51,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2023-02-13 21:55:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-13 21:55:51,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725018719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:51,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:51,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2023-02-13 21:55:51,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185631889] [2023-02-13 21:55:51,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:51,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-13 21:55:51,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-13 21:55:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2023-02-13 21:55:51,659 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:53,476 INFO L93 Difference]: Finished difference Result 436 states and 558 transitions. [2023-02-13 21:55:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-13 21:55:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-13 21:55:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:53,477 INFO L225 Difference]: With dead ends: 436 [2023-02-13 21:55:53,477 INFO L226 Difference]: Without dead ends: 412 [2023-02-13 21:55:53,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2023-02-13 21:55:53,479 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 596 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:53,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1828 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 21:55:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-13 21:55:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 241. [2023-02-13 21:55:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.252212389380531) internal successors, (283), 227 states have internal predecessors, (283), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-13 21:55:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2023-02-13 21:55:53,558 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 58 [2023-02-13 21:55:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:53,558 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2023-02-13 21:55:53,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2023-02-13 21:55:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-13 21:55:53,559 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:53,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:53,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:53,764 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2023-02-13 21:55:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:53,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918238839] [2023-02-13 21:55:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:53,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:54,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:55:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:54,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:55:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:54,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918238839] [2023-02-13 21:55:54,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918238839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:54,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735938370] [2023-02-13 21:55:54,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:55:54,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:54,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:54,521 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) [2023-02-13 21:55:54,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-13 21:55:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-13 21:55:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-13 21:55:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:55:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:57,584 INFO L321 Elim1Store]: treesize reduction 73, result has 86.7 percent of original size [2023-02-13 21:55:57,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 496 [2023-02-13 21:56:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-13 21:56:51,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735938370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:56:51,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:56:51,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 25] total 56 [2023-02-13 21:56:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904271136] [2023-02-13 21:56:51,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:56:51,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-13 21:56:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:56:51,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-13 21:56:51,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2023-02-13 21:56:51,686 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:56:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:56:59,066 INFO L93 Difference]: Finished difference Result 611 states and 786 transitions. [2023-02-13 21:56:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-13 21:56:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-13 21:56:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:56:59,068 INFO L225 Difference]: With dead ends: 611 [2023-02-13 21:56:59,068 INFO L226 Difference]: Without dead ends: 504 [2023-02-13 21:56:59,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2000, Invalid=12520, Unknown=0, NotChecked=0, Total=14520 [2023-02-13 21:56:59,072 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 813 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:56:59,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1850 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-13 21:56:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-13 21:56:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 261. [2023-02-13 21:56:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 247 states have internal predecessors, (308), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-13 21:56:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 329 transitions. [2023-02-13 21:56:59,156 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 329 transitions. Word has length 58 [2023-02-13 21:56:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:56:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 329 transitions. [2023-02-13 21:56:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:56:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 329 transitions. [2023-02-13 21:56:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-13 21:56:59,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:56:59,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:56:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-13 21:56:59,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-13 21:56:59,363 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:56:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:56:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1550031143, now seen corresponding path program 6 times [2023-02-13 21:56:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:56:59,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171024346] [2023-02-13 21:56:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:56:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:56:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:00,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:00,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-13 21:57:00,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:00,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171024346] [2023-02-13 21:57:00,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171024346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800077357] [2023-02-13 21:57:00,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 21:57:00,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:00,087 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) [2023-02-13 21:57:00,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-13 21:57:00,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-13 21:57:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-13 21:57:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:57:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:57:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:57:00,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:57:00,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 39 [2023-02-13 21:57:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:57:00,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:01,081 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-13 21:57:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2023-02-13 21:57:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-13 21:57:01,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800077357] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:01,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:01,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 41 [2023-02-13 21:57:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606558465] [2023-02-13 21:57:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:01,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-13 21:57:01,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-13 21:57:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2023-02-13 21:57:01,665 INFO L87 Difference]: Start difference. First operand 261 states and 329 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:57:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:04,022 INFO L93 Difference]: Finished difference Result 469 states and 598 transitions. [2023-02-13 21:57:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-13 21:57:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2023-02-13 21:57:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:04,023 INFO L225 Difference]: With dead ends: 469 [2023-02-13 21:57:04,023 INFO L226 Difference]: Without dead ends: 443 [2023-02-13 21:57:04,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2023-02-13 21:57:04,024 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 446 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:04,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2095 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 21:57:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-13 21:57:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 254. [2023-02-13 21:57:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 240 states have internal predecessors, (299), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-13 21:57:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 320 transitions. [2023-02-13 21:57:04,109 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 320 transitions. Word has length 58 [2023-02-13 21:57:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:04,109 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 320 transitions. [2023-02-13 21:57:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:57:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 320 transitions. [2023-02-13 21:57:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-13 21:57:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:04,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:04,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:04,316 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,SelfDestructingSolverStorable33 [2023-02-13 21:57:04,317 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1948639156, now seen corresponding path program 2 times [2023-02-13 21:57:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:04,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869301050] [2023-02-13 21:57:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:04,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:04,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-13 21:57:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:04,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-02-13 21:57:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:57:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869301050] [2023-02-13 21:57:04,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869301050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460163605] [2023-02-13 21:57:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:57:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:04,793 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) [2023-02-13 21:57:04,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-13 21:57:04,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:57:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:04,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-13 21:57:04,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:05,030 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-13 21:57:05,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2023-02-13 21:57:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:57:05,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:05,178 INFO L321 Elim1Store]: treesize reduction 19, result has 80.0 percent of original size [2023-02-13 21:57:05,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2023-02-13 21:57:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:57:05,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460163605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:05,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 23 [2023-02-13 21:57:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001634922] [2023-02-13 21:57:05,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-13 21:57:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-13 21:57:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:57:05,344 INFO L87 Difference]: Start difference. First operand 254 states and 320 transitions. Second operand has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 21:57:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:05,876 INFO L93 Difference]: Finished difference Result 407 states and 517 transitions. [2023-02-13 21:57:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 21:57:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2023-02-13 21:57:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:05,879 INFO L225 Difference]: With dead ends: 407 [2023-02-13 21:57:05,879 INFO L226 Difference]: Without dead ends: 343 [2023-02-13 21:57:05,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-02-13 21:57:05,880 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 153 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:05,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 785 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:57:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-02-13 21:57:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 258. [2023-02-13 21:57:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 242 states have (on average 1.2396694214876034) internal successors, (300), 243 states have internal predecessors, (300), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-13 21:57:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2023-02-13 21:57:05,999 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 62 [2023-02-13 21:57:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:06,000 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2023-02-13 21:57:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-13 21:57:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2023-02-13 21:57:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-13 21:57:06,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:06,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-13 21:57:06,206 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -158527231, now seen corresponding path program 2 times [2023-02-13 21:57:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:06,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347663189] [2023-02-13 21:57:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:06,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:06,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-13 21:57:06,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347663189] [2023-02-13 21:57:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347663189] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411439511] [2023-02-13 21:57:06,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:57:06,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:06,383 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) [2023-02-13 21:57:06,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-13 21:57:06,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:57:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-13 21:57:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:57:06,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:57:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411439511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:06,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2023-02-13 21:57:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827832171] [2023-02-13 21:57:06,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 21:57:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 21:57:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:57:06,873 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:09,776 INFO L93 Difference]: Finished difference Result 815 states and 1047 transitions. [2023-02-13 21:57:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-13 21:57:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2023-02-13 21:57:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:09,778 INFO L225 Difference]: With dead ends: 815 [2023-02-13 21:57:09,778 INFO L226 Difference]: Without dead ends: 608 [2023-02-13 21:57:09,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=949, Invalid=7423, Unknown=0, NotChecked=0, Total=8372 [2023-02-13 21:57:09,781 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 492 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:09,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 2037 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 21:57:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-02-13 21:57:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 485. [2023-02-13 21:57:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 469 states have (on average 1.2537313432835822) internal successors, (588), 470 states have internal predecessors, (588), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-13 21:57:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 611 transitions. [2023-02-13 21:57:09,949 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 611 transitions. Word has length 60 [2023-02-13 21:57:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:09,949 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 611 transitions. [2023-02-13 21:57:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 611 transitions. [2023-02-13 21:57:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-13 21:57:09,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:09,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:09,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:10,155 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1380776590, now seen corresponding path program 1 times [2023-02-13 21:57:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:10,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504260091] [2023-02-13 21:57:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:10,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-13 21:57:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-13 21:57:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:57:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:10,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504260091] [2023-02-13 21:57:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504260091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:10,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170225013] [2023-02-13 21:57:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:10,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:10,637 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) [2023-02-13 21:57:10,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-13 21:57:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-13 21:57:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:11,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:57:11,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 10 [2023-02-13 21:57:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:57:11,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:11,502 INFO L321 Elim1Store]: treesize reduction 19, result has 81.0 percent of original size [2023-02-13 21:57:11,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 88 [2023-02-13 21:57:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-13 21:57:12,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170225013] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:12,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:12,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2023-02-13 21:57:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723710111] [2023-02-13 21:57:12,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:12,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-13 21:57:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:12,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-13 21:57:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2023-02-13 21:57:12,017 INFO L87 Difference]: Start difference. First operand 485 states and 611 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-13 21:57:14,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 21:57:16,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 21:57:18,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 21:57:20,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-13 21:57:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:21,571 INFO L93 Difference]: Finished difference Result 703 states and 892 transitions. [2023-02-13 21:57:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-13 21:57:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 63 [2023-02-13 21:57:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:21,574 INFO L225 Difference]: With dead ends: 703 [2023-02-13 21:57:21,574 INFO L226 Difference]: Without dead ends: 701 [2023-02-13 21:57:21,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 21:57:21,575 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 435 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:21,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 927 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1350 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2023-02-13 21:57:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2023-02-13 21:57:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 619. [2023-02-13 21:57:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 590 states have (on average 1.259322033898305) internal successors, (743), 594 states have internal predecessors, (743), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:57:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 783 transitions. [2023-02-13 21:57:21,794 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 783 transitions. Word has length 63 [2023-02-13 21:57:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 783 transitions. [2023-02-13 21:57:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-13 21:57:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 783 transitions. [2023-02-13 21:57:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-13 21:57:21,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:21,796 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:21,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-13 21:57:22,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-13 21:57:22,001 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2005256085, now seen corresponding path program 7 times [2023-02-13 21:57:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:22,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810622330] [2023-02-13 21:57:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:22,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:22,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:22,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 21:57:22,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810622330] [2023-02-13 21:57:22,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810622330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274733886] [2023-02-13 21:57:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 21:57:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:22,231 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) [2023-02-13 21:57:22,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-13 21:57:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-13 21:57:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:57:22,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 21:57:22,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274733886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:22,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:22,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 28 [2023-02-13 21:57:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70438607] [2023-02-13 21:57:22,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-13 21:57:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-13 21:57:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-02-13 21:57:22,757 INFO L87 Difference]: Start difference. First operand 619 states and 783 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:24,316 INFO L93 Difference]: Finished difference Result 1685 states and 2170 transitions. [2023-02-13 21:57:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-13 21:57:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2023-02-13 21:57:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:24,324 INFO L225 Difference]: With dead ends: 1685 [2023-02-13 21:57:24,324 INFO L226 Difference]: Without dead ends: 1263 [2023-02-13 21:57:24,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2023-02-13 21:57:24,326 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1062 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:24,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1651 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:57:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-02-13 21:57:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 703. [2023-02-13 21:57:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 674 states have (on average 1.268545994065282) internal successors, (855), 678 states have internal predecessors, (855), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:57:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 895 transitions. [2023-02-13 21:57:24,722 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 895 transitions. Word has length 61 [2023-02-13 21:57:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:24,722 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 895 transitions. [2023-02-13 21:57:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 895 transitions. [2023-02-13 21:57:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-13 21:57:24,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:24,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:24,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:24,928 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,SelfDestructingSolverStorable37 [2023-02-13 21:57:24,928 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1579304483, now seen corresponding path program 3 times [2023-02-13 21:57:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:24,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445843645] [2023-02-13 21:57:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-13 21:57:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445843645] [2023-02-13 21:57:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445843645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025458214] [2023-02-13 21:57:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:57:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:25,629 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) [2023-02-13 21:57:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-13 21:57:25,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-13 21:57:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-13 21:57:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:25,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 21:57:26,320 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-13 21:57:26,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-02-13 21:57:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:57:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-13 21:57:26,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025458214] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:26,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:26,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 13] total 45 [2023-02-13 21:57:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145930689] [2023-02-13 21:57:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-13 21:57:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-13 21:57:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2023-02-13 21:57:26,920 INFO L87 Difference]: Start difference. First operand 703 states and 895 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:57:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:29,399 INFO L93 Difference]: Finished difference Result 1049 states and 1355 transitions. [2023-02-13 21:57:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 21:57:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2023-02-13 21:57:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:29,402 INFO L225 Difference]: With dead ends: 1049 [2023-02-13 21:57:29,402 INFO L226 Difference]: Without dead ends: 953 [2023-02-13 21:57:29,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=708, Invalid=5298, Unknown=0, NotChecked=0, Total=6006 [2023-02-13 21:57:29,403 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 651 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:29,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1752 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 21:57:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-02-13 21:57:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 761. [2023-02-13 21:57:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 732 states have (on average 1.2745901639344261) internal successors, (933), 736 states have internal predecessors, (933), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:57:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 973 transitions. [2023-02-13 21:57:29,667 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 973 transitions. Word has length 62 [2023-02-13 21:57:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:29,667 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 973 transitions. [2023-02-13 21:57:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:57:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 973 transitions. [2023-02-13 21:57:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-13 21:57:29,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:29,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:29,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:29,874 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,SelfDestructingSolverStorable38 [2023-02-13 21:57:29,874 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash -892086793, now seen corresponding path program 8 times [2023-02-13 21:57:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:29,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502008033] [2023-02-13 21:57:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 21:57:30,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502008033] [2023-02-13 21:57:30,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502008033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241711677] [2023-02-13 21:57:30,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:57:30,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:30,473 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) [2023-02-13 21:57:30,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-13 21:57:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:57:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-13 21:57:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:57:30,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:57:31,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241711677] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:31,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:31,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 39 [2023-02-13 21:57:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467208153] [2023-02-13 21:57:31,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-13 21:57:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-13 21:57:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2023-02-13 21:57:31,017 INFO L87 Difference]: Start difference. First operand 761 states and 973 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:44,756 INFO L93 Difference]: Finished difference Result 3577 states and 4673 transitions. [2023-02-13 21:57:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-02-13 21:57:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-02-13 21:57:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:44,768 INFO L225 Difference]: With dead ends: 3577 [2023-02-13 21:57:44,768 INFO L226 Difference]: Without dead ends: 3386 [2023-02-13 21:57:44,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2804, Invalid=27646, Unknown=0, NotChecked=0, Total=30450 [2023-02-13 21:57:44,783 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 3491 mSDsluCounter, 5617 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 5923 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:44,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 5923 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-13 21:57:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2023-02-13 21:57:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 673. [2023-02-13 21:57:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 644 states have (on average 1.2826086956521738) internal successors, (826), 648 states have internal predecessors, (826), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:57:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 866 transitions. [2023-02-13 21:57:45,122 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 866 transitions. Word has length 63 [2023-02-13 21:57:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:45,122 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 866 transitions. [2023-02-13 21:57:45,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 866 transitions. [2023-02-13 21:57:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-13 21:57:45,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:45,124 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:45,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:45,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-13 21:57:45,329 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2033592005, now seen corresponding path program 3 times [2023-02-13 21:57:45,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:45,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308983026] [2023-02-13 21:57:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:45,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:45,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:45,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-13 21:57:45,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:45,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308983026] [2023-02-13 21:57:45,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308983026] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:45,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260545061] [2023-02-13 21:57:45,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:57:45,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:45,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:45,532 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:57:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-13 21:57:45,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-13 21:57:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-13 21:57:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-13 21:57:46,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-13 21:57:46,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260545061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:46,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:46,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-02-13 21:57:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828309258] [2023-02-13 21:57:46,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:46,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-13 21:57:46,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-13 21:57:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-13 21:57:46,396 INFO L87 Difference]: Start difference. First operand 673 states and 866 transitions. Second operand has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:57:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:48,969 INFO L93 Difference]: Finished difference Result 863 states and 1110 transitions. [2023-02-13 21:57:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-13 21:57:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-02-13 21:57:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:48,972 INFO L225 Difference]: With dead ends: 863 [2023-02-13 21:57:48,972 INFO L226 Difference]: Without dead ends: 807 [2023-02-13 21:57:48,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=717, Invalid=4833, Unknown=0, NotChecked=0, Total=5550 [2023-02-13 21:57:48,973 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1185 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:48,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1100 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 21:57:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-02-13 21:57:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 687. [2023-02-13 21:57:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 658 states have (on average 1.2826747720364742) internal successors, (844), 662 states have internal predecessors, (844), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:57:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 884 transitions. [2023-02-13 21:57:49,294 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 884 transitions. Word has length 67 [2023-02-13 21:57:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:49,294 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 884 transitions. [2023-02-13 21:57:49,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:57:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 884 transitions. [2023-02-13 21:57:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-13 21:57:49,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:49,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:49,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:49,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-13 21:57:49,501 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:49,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:49,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1736078367, now seen corresponding path program 9 times [2023-02-13 21:57:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:49,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485556493] [2023-02-13 21:57:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:57:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:57:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-13 21:57:50,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485556493] [2023-02-13 21:57:50,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485556493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561071737] [2023-02-13 21:57:50,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:57:50,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:50,422 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:57:50,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-13 21:57:52,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-13 21:57:52,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:57:52,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-13 21:57:52,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:57:53,659 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-02-13 21:57:53,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 74 [2023-02-13 21:57:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:57:53,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:54,689 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-13 21:57:54,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2023-02-13 21:57:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-13 21:57:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561071737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:55,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:55,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 68 [2023-02-13 21:57:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540396512] [2023-02-13 21:57:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-13 21:57:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-13 21:57:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 21:57:55,601 INFO L87 Difference]: Start difference. First operand 687 states and 884 transitions. Second operand has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:58:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:58:08,465 INFO L93 Difference]: Finished difference Result 2542 states and 3322 transitions. [2023-02-13 21:58:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-13 21:58:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-13 21:58:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:58:08,471 INFO L225 Difference]: With dead ends: 2542 [2023-02-13 21:58:08,471 INFO L226 Difference]: Without dead ends: 2484 [2023-02-13 21:58:08,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7386 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2222, Invalid=24510, Unknown=0, NotChecked=0, Total=26732 [2023-02-13 21:58:08,473 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 2138 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 8829 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 5922 SdHoareTripleChecker+Invalid, 9299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 8829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:58:08,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2138 Valid, 5922 Invalid, 9299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 8829 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-02-13 21:58:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2023-02-13 21:58:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 711. [2023-02-13 21:58:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 682 states have (on average 1.281524926686217) internal successors, (874), 686 states have internal predecessors, (874), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:58:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 914 transitions. [2023-02-13 21:58:08,833 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 914 transitions. Word has length 68 [2023-02-13 21:58:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:58:08,833 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 914 transitions. [2023-02-13 21:58:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:58:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 914 transitions. [2023-02-13 21:58:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-13 21:58:08,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:58:08,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:58:08,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-13 21:58:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:58:09,041 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:58:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:58:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1104262353, now seen corresponding path program 10 times [2023-02-13 21:58:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:58:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256945881] [2023-02-13 21:58:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:58:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:58:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:09,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:58:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:58:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-13 21:58:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:58:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256945881] [2023-02-13 21:58:09,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256945881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:58:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412895195] [2023-02-13 21:58:09,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:58:09,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:58:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:58:09,941 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:58:09,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-13 21:58:10,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:58:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:58:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-13 21:58:10,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:58:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:58:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:58:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:58:10,859 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:58:10,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:58:10,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2023-02-13 21:58:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:58:10,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:58:11,200 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-13 21:58:11,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2023-02-13 21:58:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-13 21:58:12,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412895195] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:58:12,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:58:12,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 17] total 52 [2023-02-13 21:58:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176445084] [2023-02-13 21:58:12,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:58:12,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-13 21:58:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:58:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-13 21:58:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2023-02-13 21:58:12,039 INFO L87 Difference]: Start difference. First operand 711 states and 914 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:58:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:58:15,087 INFO L93 Difference]: Finished difference Result 1222 states and 1586 transitions. [2023-02-13 21:58:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-13 21:58:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-13 21:58:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:58:15,090 INFO L225 Difference]: With dead ends: 1222 [2023-02-13 21:58:15,090 INFO L226 Difference]: Without dead ends: 1060 [2023-02-13 21:58:15,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=568, Invalid=5132, Unknown=0, NotChecked=0, Total=5700 [2023-02-13 21:58:15,092 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 598 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-13 21:58:15,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 2221 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-13 21:58:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-13 21:58:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 741. [2023-02-13 21:58:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 712 states have (on average 1.2808988764044944) internal successors, (912), 716 states have internal predecessors, (912), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:58:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 952 transitions. [2023-02-13 21:58:15,487 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 952 transitions. Word has length 68 [2023-02-13 21:58:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:58:15,488 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 952 transitions. [2023-02-13 21:58:15,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-13 21:58:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 952 transitions. [2023-02-13 21:58:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-13 21:58:15,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:58:15,490 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:58:15,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-13 21:58:15,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-13 21:58:15,696 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:58:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:58:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash -797080539, now seen corresponding path program 11 times [2023-02-13 21:58:15,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:58:15,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065570901] [2023-02-13 21:58:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:58:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:58:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:16,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:58:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:58:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-13 21:58:16,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:58:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065570901] [2023-02-13 21:58:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065570901] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:58:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207244817] [2023-02-13 21:58:16,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:58:16,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:58:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:58:16,703 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:58:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-13 21:58:19,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-13 21:58:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:58:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-13 21:58:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:58:20,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 21:58:20,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 21:58:20,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 21:58:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 21:58:21,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:58:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-13 21:58:24,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207244817] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:58:24,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:58:24,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 24] total 68 [2023-02-13 21:58:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352509045] [2023-02-13 21:58:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:58:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-13 21:58:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:58:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-13 21:58:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 21:58:24,412 INFO L87 Difference]: Start difference. First operand 741 states and 952 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:59:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:05,079 INFO L93 Difference]: Finished difference Result 2456 states and 3209 transitions. [2023-02-13 21:59:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-02-13 21:59:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-13 21:59:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:05,085 INFO L225 Difference]: With dead ends: 2456 [2023-02-13 21:59:05,085 INFO L226 Difference]: Without dead ends: 2279 [2023-02-13 21:59:05,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9589 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=3395, Invalid=27757, Unknown=0, NotChecked=0, Total=31152 [2023-02-13 21:59:05,087 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1932 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 7535 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 7979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 7535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:05,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 3299 Invalid, 7979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 7535 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2023-02-13 21:59:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2023-02-13 21:59:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 797. [2023-02-13 21:59:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 768 states have (on average 1.2864583333333333) internal successors, (988), 772 states have internal predecessors, (988), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:59:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1028 transitions. [2023-02-13 21:59:05,556 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1028 transitions. Word has length 68 [2023-02-13 21:59:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:05,556 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1028 transitions. [2023-02-13 21:59:05,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:59:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1028 transitions. [2023-02-13 21:59:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-13 21:59:05,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:05,557 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:05,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-13 21:59:05,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:05,763 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1785704929, now seen corresponding path program 12 times [2023-02-13 21:59:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844698425] [2023-02-13 21:59:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:06,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:06,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-13 21:59:06,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844698425] [2023-02-13 21:59:06,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844698425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:06,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032384303] [2023-02-13 21:59:06,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 21:59:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:06,606 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:06,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-13 21:59:06,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-13 21:59:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:59:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-13 21:59:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:07,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:59:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:59:07,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 21:59:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 21:59:07,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 21:59:07,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2023-02-13 21:59:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-13 21:59:07,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:07,680 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-13 21:59:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2023-02-13 21:59:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-13 21:59:08,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032384303] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:08,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:08,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 16] total 44 [2023-02-13 21:59:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851080736] [2023-02-13 21:59:08,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-13 21:59:08,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-13 21:59:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2023-02-13 21:59:08,328 INFO L87 Difference]: Start difference. First operand 797 states and 1028 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:59:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:10,898 INFO L93 Difference]: Finished difference Result 1275 states and 1664 transitions. [2023-02-13 21:59:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-13 21:59:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-13 21:59:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:10,901 INFO L225 Difference]: With dead ends: 1275 [2023-02-13 21:59:10,901 INFO L226 Difference]: Without dead ends: 1217 [2023-02-13 21:59:10,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=4101, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 21:59:10,902 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 468 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1928 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 21:59:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-02-13 21:59:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 793. [2023-02-13 21:59:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 764 states have (on average 1.287958115183246) internal successors, (984), 768 states have internal predecessors, (984), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:59:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1024 transitions. [2023-02-13 21:59:11,344 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1024 transitions. Word has length 68 [2023-02-13 21:59:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:11,344 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1024 transitions. [2023-02-13 21:59:11,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 21:59:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1024 transitions. [2023-02-13 21:59:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-13 21:59:11,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:11,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:11,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-13 21:59:11,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-13 21:59:11,552 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1009014033, now seen corresponding path program 2 times [2023-02-13 21:59:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:11,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045264453] [2023-02-13 21:59:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:11,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-13 21:59:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-13 21:59:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-13 21:59:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-13 21:59:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045264453] [2023-02-13 21:59:11,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045264453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:59:11,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:59:11,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 21:59:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101588371] [2023-02-13 21:59:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:59:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 21:59:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 21:59:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-13 21:59:11,632 INFO L87 Difference]: Start difference. First operand 793 states and 1024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-13 21:59:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:12,106 INFO L93 Difference]: Finished difference Result 862 states and 1110 transitions. [2023-02-13 21:59:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:59:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-02-13 21:59:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:12,108 INFO L225 Difference]: With dead ends: 862 [2023-02-13 21:59:12,108 INFO L226 Difference]: Without dead ends: 813 [2023-02-13 21:59:12,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-13 21:59:12,109 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:12,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 174 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:59:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-02-13 21:59:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 805. [2023-02-13 21:59:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 776 states have (on average 1.2835051546391754) internal successors, (996), 780 states have internal predecessors, (996), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-13 21:59:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1036 transitions. [2023-02-13 21:59:12,541 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1036 transitions. Word has length 73 [2023-02-13 21:59:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:12,541 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1036 transitions. [2023-02-13 21:59:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-13 21:59:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1036 transitions. [2023-02-13 21:59:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-13 21:59:12,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:12,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-13 21:59:12,558 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1900032544, now seen corresponding path program 1 times [2023-02-13 21:59:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:12,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958541691] [2023-02-13 21:59:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-13 21:59:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-13 21:59:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-13 21:59:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 21:59:12,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:12,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958541691] [2023-02-13 21:59:12,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958541691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:12,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167275499] [2023-02-13 21:59:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:12,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:12,738 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:12,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-13 21:59:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:12,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 21:59:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 21:59:12,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-13 21:59:13,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167275499] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:13,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:13,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2023-02-13 21:59:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653848742] [2023-02-13 21:59:13,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:13,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-13 21:59:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-13 21:59:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-13 21:59:13,084 INFO L87 Difference]: Start difference. First operand 805 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-13 21:59:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:13,640 INFO L93 Difference]: Finished difference Result 818 states and 1047 transitions. [2023-02-13 21:59:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 21:59:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2023-02-13 21:59:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:13,643 INFO L225 Difference]: With dead ends: 818 [2023-02-13 21:59:13,643 INFO L226 Difference]: Without dead ends: 758 [2023-02-13 21:59:13,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-02-13 21:59:13,643 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 62 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:13,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 672 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:59:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-02-13 21:59:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2023-02-13 21:59:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 734 states have (on average 1.2956403269754768) internal successors, (951), 737 states have internal predecessors, (951), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 21:59:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 981 transitions. [2023-02-13 21:59:14,051 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 981 transitions. Word has length 74 [2023-02-13 21:59:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:14,051 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 981 transitions. [2023-02-13 21:59:14,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-13 21:59:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 981 transitions. [2023-02-13 21:59:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-13 21:59:14,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:14,052 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:14,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-02-13 21:59:14,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-13 21:59:14,258 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1078383189, now seen corresponding path program 2 times [2023-02-13 21:59:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:14,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624016267] [2023-02-13 21:59:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:14,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-13 21:59:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-13 21:59:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-13 21:59:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-13 21:59:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624016267] [2023-02-13 21:59:14,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624016267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688784588] [2023-02-13 21:59:14,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:59:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:14,405 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:14,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-13 21:59:14,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:59:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:59:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-13 21:59:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-13 21:59:14,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-13 21:59:14,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688784588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:14,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:14,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 25 [2023-02-13 21:59:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927092307] [2023-02-13 21:59:14,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:14,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 21:59:14,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 21:59:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:59:14,838 INFO L87 Difference]: Start difference. First operand 758 states and 981 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-13 21:59:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:16,399 INFO L93 Difference]: Finished difference Result 1141 states and 1474 transitions. [2023-02-13 21:59:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-13 21:59:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 74 [2023-02-13 21:59:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:16,402 INFO L225 Difference]: With dead ends: 1141 [2023-02-13 21:59:16,403 INFO L226 Difference]: Without dead ends: 1035 [2023-02-13 21:59:16,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2023-02-13 21:59:16,403 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 343 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 823 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:59:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-02-13 21:59:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 760. [2023-02-13 21:59:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 736 states have (on average 1.28125) internal successors, (943), 739 states have internal predecessors, (943), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 21:59:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 973 transitions. [2023-02-13 21:59:16,816 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 973 transitions. Word has length 74 [2023-02-13 21:59:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:16,817 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 973 transitions. [2023-02-13 21:59:16,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-13 21:59:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 973 transitions. [2023-02-13 21:59:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-13 21:59:16,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:16,818 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:16,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-13 21:59:17,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-13 21:59:17,024 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash 894264333, now seen corresponding path program 13 times [2023-02-13 21:59:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:17,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550860967] [2023-02-13 21:59:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-13 21:59:17,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550860967] [2023-02-13 21:59:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550860967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:17,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516272867] [2023-02-13 21:59:17,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 21:59:17,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:17,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:17,331 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:17,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-13 21:59:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-13 21:59:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-13 21:59:17,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-13 21:59:17,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516272867] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:17,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:17,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 33 [2023-02-13 21:59:17,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464271463] [2023-02-13 21:59:17,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:17,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-13 21:59:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-13 21:59:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 21:59:17,889 INFO L87 Difference]: Start difference. First operand 760 states and 973 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:59:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:21,205 INFO L93 Difference]: Finished difference Result 2724 states and 3534 transitions. [2023-02-13 21:59:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-13 21:59:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-02-13 21:59:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:21,210 INFO L225 Difference]: With dead ends: 2724 [2023-02-13 21:59:21,210 INFO L226 Difference]: Without dead ends: 2256 [2023-02-13 21:59:21,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=524, Invalid=3636, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 21:59:21,211 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1643 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:21,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2791 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-13 21:59:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-02-13 21:59:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 834. [2023-02-13 21:59:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 810 states have (on average 1.2938271604938272) internal successors, (1048), 813 states have internal predecessors, (1048), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 21:59:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1078 transitions. [2023-02-13 21:59:21,664 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1078 transitions. Word has length 71 [2023-02-13 21:59:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:21,665 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1078 transitions. [2023-02-13 21:59:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:59:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1078 transitions. [2023-02-13 21:59:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-13 21:59:21,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:21,666 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:21,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-13 21:59:21,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-13 21:59:21,871 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1854811415, now seen corresponding path program 1 times [2023-02-13 21:59:21,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:21,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021399420] [2023-02-13 21:59:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:21,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:22,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-13 21:59:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021399420] [2023-02-13 21:59:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021399420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260591987] [2023-02-13 21:59:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:22,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:22,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:22,061 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:22,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-13 21:59:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-13 21:59:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-13 21:59:22,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-13 21:59:22,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260591987] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:22,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:22,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2023-02-13 21:59:22,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689702173] [2023-02-13 21:59:22,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:22,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-13 21:59:22,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-13 21:59:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 21:59:22,603 INFO L87 Difference]: Start difference. First operand 834 states and 1078 transitions. Second operand has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:59:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:59:24,095 INFO L93 Difference]: Finished difference Result 1285 states and 1643 transitions. [2023-02-13 21:59:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-13 21:59:24,096 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-02-13 21:59:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:59:24,101 INFO L225 Difference]: With dead ends: 1285 [2023-02-13 21:59:24,101 INFO L226 Difference]: Without dead ends: 977 [2023-02-13 21:59:24,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-02-13 21:59:24,105 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 114 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:59:24,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1804 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:59:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-02-13 21:59:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 812. [2023-02-13 21:59:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 788 states have (on average 1.2931472081218274) internal successors, (1019), 791 states have internal predecessors, (1019), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-13 21:59:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1049 transitions. [2023-02-13 21:59:24,590 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1049 transitions. Word has length 71 [2023-02-13 21:59:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:59:24,590 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1049 transitions. [2023-02-13 21:59:24,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:59:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1049 transitions. [2023-02-13 21:59:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-13 21:59:24,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:59:24,592 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:59:24,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-13 21:59:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-13 21:59:24,792 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:59:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:59:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1292302041, now seen corresponding path program 4 times [2023-02-13 21:59:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:59:24,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454902551] [2023-02-13 21:59:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:59:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:59:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-13 21:59:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:25,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-13 21:59:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:59:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-13 21:59:25,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:59:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454902551] [2023-02-13 21:59:25,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454902551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:59:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169679298] [2023-02-13 21:59:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:59:25,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:59:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:59:25,599 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:59:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-13 21:59:25,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:59:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:59:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-13 21:59:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:59:26,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 21:59:26,793 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-13 21:59:26,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2023-02-13 21:59:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 74 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-13 21:59:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:59:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-13 21:59:27,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169679298] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:59:27,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:59:27,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 16] total 56 [2023-02-13 21:59:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259396893] [2023-02-13 21:59:27,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:59:27,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-13 21:59:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:59:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-13 21:59:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2023-02-13 21:59:27,590 INFO L87 Difference]: Start difference. First operand 812 states and 1049 transitions. Second operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)