./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:48:57,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:48:57,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:48:57,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:48:57,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:48:57,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:48:57,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:48:57,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:48:57,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:48:57,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:48:57,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:48:57,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:48:57,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:48:57,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:48:57,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:48:57,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:48:57,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:48:57,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:48:57,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:48:57,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:48:57,203 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:48:57,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:48:57,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:48:57,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:48:57,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:48:57,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:48:57,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:48:57,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:48:57,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:48:57,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:48:57,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:48:57,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:48:57,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:48:57,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:48:57,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:48:57,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:48:57,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:48:57,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:48:57,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:48:57,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:48:57,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:48:57,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:48:57,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 22:48:57,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:48:57,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:48:57,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:48:57,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:48:57,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:48:57,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:48:57,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:48:57,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:48:57,255 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:48:57,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:48:57,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 22:48:57,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:48:57,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:48:57,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:48:57,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:48:57,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:48:57,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:48:57,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:48:57,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:48:57,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:48:57,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:48:57,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:48:57,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:48:57,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:48:57,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:48:57,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 22:48:57,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 22:48:57,259 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:48:57,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:48:57,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:48:57,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2022-07-19 22:48:57,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:48:57,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:48:57,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:48:57,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:48:57,523 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:48:57,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-19 22:48:57,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d404cd/f93734ef3ea2460680d64a7f225820f4/FLAGebe3298cf [2022-07-19 22:48:58,179 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:48:58,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-19 22:48:58,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d404cd/f93734ef3ea2460680d64a7f225820f4/FLAGebe3298cf [2022-07-19 22:48:58,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a12d404cd/f93734ef3ea2460680d64a7f225820f4 [2022-07-19 22:48:58,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:48:58,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:48:58,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:48:58,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:48:58,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:48:58,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:48:58" (1/1) ... [2022-07-19 22:48:58,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5445b29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:58, skipping insertion in model container [2022-07-19 22:48:58,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:48:58" (1/1) ... [2022-07-19 22:48:58,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:48:58,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:48:59,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-07-19 22:48:59,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:48:59,561 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 22:48:59,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-07-19 22:48:59,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:48:59,875 INFO L208 MainTranslator]: Completed translation [2022-07-19 22:48:59,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59 WrapperNode [2022-07-19 22:48:59,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 22:48:59,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 22:48:59,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 22:48:59,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 22:48:59,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:48:59,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,097 INFO L137 Inliner]: procedures = 191, calls = 1268, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3442 [2022-07-19 22:49:00,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 22:49:00,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 22:49:00,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 22:49:00,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 22:49:00,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 22:49:00,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 22:49:00,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 22:49:00,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 22:49:00,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (1/1) ... [2022-07-19 22:49:00,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:49:00,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:49:00,368 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) [2022-07-19 22:49:00,379 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 [2022-07-19 22:49:00,413 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-19 22:49:00,413 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-19 22:49:00,413 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-19 22:49:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-19 22:49:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-19 22:49:00,414 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-19 22:49:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 22:49:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 22:49:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 22:49:00,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 22:49:00,415 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-19 22:49:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-19 22:49:00,415 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-19 22:49:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-19 22:49:00,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-19 22:49:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-19 22:49:00,415 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-19 22:49:00,416 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-19 22:49:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-19 22:49:00,416 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-19 22:49:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-19 22:49:00,416 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-19 22:49:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-19 22:49:00,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-19 22:49:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-19 22:49:00,417 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-19 22:49:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-07-19 22:49:00,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-07-19 22:49:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-19 22:49:00,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-19 22:49:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-19 22:49:00,418 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-19 22:49:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-19 22:49:00,418 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-19 22:49:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-19 22:49:00,418 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-19 22:49:00,418 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-19 22:49:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-19 22:49:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 22:49:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-19 22:49:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-19 22:49:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-19 22:49:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-19 22:49:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-19 22:49:00,420 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-19 22:49:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-19 22:49:00,420 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-19 22:49:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-19 22:49:00,420 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-19 22:49:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-07-19 22:49:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-07-19 22:49:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-19 22:49:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-19 22:49:00,421 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-19 22:49:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-19 22:49:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 22:49:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-19 22:49:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-19 22:49:00,423 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-19 22:49:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-19 22:49:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-19 22:49:00,424 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-19 22:49:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-19 22:49:00,424 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-19 22:49:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-19 22:49:00,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-19 22:49:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 22:49:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-19 22:49:00,425 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-19 22:49:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-19 22:49:00,425 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-19 22:49:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 22:49:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 22:49:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-19 22:49:00,426 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-19 22:49:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-19 22:49:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-19 22:49:00,426 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-19 22:49:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-19 22:49:00,427 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-19 22:49:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 22:49:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-19 22:49:00,427 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-19 22:49:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-19 22:49:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-19 22:49:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-19 22:49:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-19 22:49:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-19 22:49:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-19 22:49:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-19 22:49:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-19 22:49:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-19 22:49:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-19 22:49:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-19 22:49:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-19 22:49:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-19 22:49:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-19 22:49:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-19 22:49:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-19 22:49:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-19 22:49:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-19 22:49:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 22:49:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 22:49:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-19 22:49:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-19 22:49:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-19 22:49:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-19 22:49:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-19 22:49:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-19 22:49:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-19 22:49:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-19 22:49:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-19 22:49:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-19 22:49:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-19 22:49:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-19 22:49:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-19 22:49:00,434 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-19 22:49:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-19 22:49:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-19 22:49:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-19 22:49:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-19 22:49:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-19 22:49:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-19 22:49:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-19 22:49:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-19 22:49:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-19 22:49:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-19 22:49:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-19 22:49:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-19 22:49:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-19 22:49:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-19 22:49:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-19 22:49:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-19 22:49:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-19 22:49:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-19 22:49:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 22:49:00,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-07-19 22:49:00,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-19 22:49:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-19 22:49:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-19 22:49:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 22:49:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 22:49:00,444 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-19 22:49:00,444 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-19 22:49:00,938 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 22:49:00,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 22:49:15,328 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 22:49:15,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 22:49:15,356 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 22:49:15,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:49:15 BoogieIcfgContainer [2022-07-19 22:49:15,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 22:49:15,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 22:49:15,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 22:49:15,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 22:49:15,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:48:58" (1/3) ... [2022-07-19 22:49:15,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207d67a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:49:15, skipping insertion in model container [2022-07-19 22:49:15,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:59" (2/3) ... [2022-07-19 22:49:15,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207d67a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:49:15, skipping insertion in model container [2022-07-19 22:49:15,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:49:15" (3/3) ... [2022-07-19 22:49:15,369 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-19 22:49:15,381 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 22:49:15,381 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 22:49:15,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 22:49:15,473 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c8efce5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63f272d0 [2022-07-19 22:49:15,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 22:49:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-07-19 22:49:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 22:49:15,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:15,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:15,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1087819150, now seen corresponding path program 1 times [2022-07-19 22:49:15,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785136471] [2022-07-19 22:49:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:16,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:16,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785136471] [2022-07-19 22:49:16,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785136471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:16,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:16,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153298376] [2022-07-19 22:49:16,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:16,181 INFO L87 Difference]: Start difference. First operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:18,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:23,214 INFO L93 Difference]: Finished difference Result 4165 states and 6365 transitions. [2022-07-19 22:49:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17 [2022-07-19 22:49:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:23,251 INFO L225 Difference]: With dead ends: 4165 [2022-07-19 22:49:23,252 INFO L226 Difference]: Without dead ends: 2887 [2022-07-19 22:49:23,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:23,267 INFO L413 NwaCegarLoop]: 2056 mSDtfsCounter, 3067 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 922 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 4247 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:23,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 4247 Invalid, 2316 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [922 Valid, 1393 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-07-19 22:49:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-19 22:49:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2330. [2022-07-19 22:49:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1616 states have (on average 1.3545792079207921) internal successors, (2189), 1674 states have internal predecessors, (2189), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-07-19 22:49:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3366 transitions. [2022-07-19 22:49:23,451 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3366 transitions. Word has length 17 [2022-07-19 22:49:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:23,451 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3366 transitions. [2022-07-19 22:49:23,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3366 transitions. [2022-07-19 22:49:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 22:49:23,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:23,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 22:49:23,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash 636307650, now seen corresponding path program 1 times [2022-07-19 22:49:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:23,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305941277] [2022-07-19 22:49:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:23,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:23,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:23,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305941277] [2022-07-19 22:49:23,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305941277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:23,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:23,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294105912] [2022-07-19 22:49:23,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:23,749 INFO L87 Difference]: Start difference. First operand 2330 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:25,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:31,014 INFO L93 Difference]: Finished difference Result 6873 states and 10148 transitions. [2022-07-19 22:49:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 18 [2022-07-19 22:49:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:31,050 INFO L225 Difference]: With dead ends: 6873 [2022-07-19 22:49:31,050 INFO L226 Difference]: Without dead ends: 5734 [2022-07-19 22:49:31,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:31,064 INFO L413 NwaCegarLoop]: 3009 mSDtfsCounter, 2517 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 769 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 5470 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:31,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 5470 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1425 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-07-19 22:49:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2022-07-19 22:49:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4620. [2022-07-19 22:49:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3209 states have (on average 1.3549392334060455) internal successors, (4348), 3319 states have internal predecessors, (4348), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-07-19 22:49:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6678 transitions. [2022-07-19 22:49:31,272 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6678 transitions. Word has length 18 [2022-07-19 22:49:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:31,273 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6678 transitions. [2022-07-19 22:49:31,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6678 transitions. [2022-07-19 22:49:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 22:49:31,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:31,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:31,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 22:49:31,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 312341314, now seen corresponding path program 1 times [2022-07-19 22:49:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688114385] [2022-07-19 22:49:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:31,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:49:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:49:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:31,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:31,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688114385] [2022-07-19 22:49:31,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688114385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:31,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:31,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157050679] [2022-07-19 22:49:31,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:31,553 INFO L87 Difference]: Start difference. First operand 4620 states and 6678 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 22:49:33,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:38,980 INFO L93 Difference]: Finished difference Result 12536 states and 18549 transitions. [2022-07-19 22:49:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-19 22:49:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:39,048 INFO L225 Difference]: With dead ends: 12536 [2022-07-19 22:49:39,049 INFO L226 Difference]: Without dead ends: 11382 [2022-07-19 22:49:39,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:39,063 INFO L413 NwaCegarLoop]: 2291 mSDtfsCounter, 2930 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 928 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3221 SdHoareTripleChecker+Valid, 4280 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3221 Valid, 4280 Invalid, 2343 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [928 Valid, 1414 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-07-19 22:49:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-07-19 22:49:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 8047. [2022-07-19 22:49:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8047 states, 5595 states have (on average 1.3549597855227882) internal successors, (7581), 5785 states have internal predecessors, (7581), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-07-19 22:49:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8047 states to 8047 states and 11633 transitions. [2022-07-19 22:49:39,499 INFO L78 Accepts]: Start accepts. Automaton has 8047 states and 11633 transitions. Word has length 36 [2022-07-19 22:49:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:39,500 INFO L495 AbstractCegarLoop]: Abstraction has 8047 states and 11633 transitions. [2022-07-19 22:49:39,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 22:49:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 8047 states and 11633 transitions. [2022-07-19 22:49:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 22:49:39,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:39,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:39,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 22:49:39,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1062377866, now seen corresponding path program 1 times [2022-07-19 22:49:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225134946] [2022-07-19 22:49:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:39,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:40,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:49:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:49:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:40,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225134946] [2022-07-19 22:49:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225134946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:40,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:49:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300663249] [2022-07-19 22:49:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:40,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:49:40,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:49:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:49:40,427 INFO L87 Difference]: Start difference. First operand 8047 states and 11633 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 22:49:42,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:07,558 INFO L93 Difference]: Finished difference Result 23274 states and 34407 transitions. [2022-07-19 22:50:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 22:50:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-19 22:50:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:07,655 INFO L225 Difference]: With dead ends: 23274 [2022-07-19 22:50:07,655 INFO L226 Difference]: Without dead ends: 17598 [2022-07-19 22:50:07,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-19 22:50:07,684 INFO L413 NwaCegarLoop]: 2560 mSDtfsCounter, 3598 mSDsluCounter, 19720 mSDsCounter, 0 mSdLazyCounter, 13141 mSolverCounterSat, 1517 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 22280 SdHoareTripleChecker+Invalid, 14659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 13141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:07,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3897 Valid, 22280 Invalid, 14659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 13141 Invalid, 1 Unknown, 0 Unchecked, 25.7s Time] [2022-07-19 22:50:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2022-07-19 22:50:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 11508. [2022-07-19 22:50:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 7999 states have (on average 1.354544318039755) internal successors, (10835), 8269 states have internal predecessors, (10835), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-07-19 22:50:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 16633 transitions. [2022-07-19 22:50:08,298 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 16633 transitions. Word has length 38 [2022-07-19 22:50:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:08,299 INFO L495 AbstractCegarLoop]: Abstraction has 11508 states and 16633 transitions. [2022-07-19 22:50:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 22:50:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 16633 transitions. [2022-07-19 22:50:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 22:50:08,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:08,303 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:50:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 22:50:08,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -479641513, now seen corresponding path program 1 times [2022-07-19 22:50:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261865809] [2022-07-19 22:50:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:50:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:50:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:50:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261865809] [2022-07-19 22:50:09,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261865809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:50:09,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:50:09,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-19 22:50:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933168059] [2022-07-19 22:50:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:50:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:50:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:50:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:50:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:50:09,909 INFO L87 Difference]: Start difference. First operand 11508 states and 16633 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 22:50:11,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:41,273 INFO L93 Difference]: Finished difference Result 18438 states and 27352 transitions. [2022-07-19 22:50:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 22:50:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-07-19 22:50:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:41,349 INFO L225 Difference]: With dead ends: 18438 [2022-07-19 22:50:41,350 INFO L226 Difference]: Without dead ends: 17321 [2022-07-19 22:50:41,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 22:50:41,363 INFO L413 NwaCegarLoop]: 2202 mSDtfsCounter, 4361 mSDsluCounter, 17876 mSDsCounter, 0 mSdLazyCounter, 14133 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4647 SdHoareTripleChecker+Valid, 20078 SdHoareTripleChecker+Invalid, 16045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 14133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:41,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4647 Valid, 20078 Invalid, 16045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 14133 Invalid, 1 Unknown, 0 Unchecked, 29.3s Time] [2022-07-19 22:50:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17321 states. [2022-07-19 22:50:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17321 to 10399. [2022-07-19 22:50:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7231 states have (on average 1.3536163739455125) internal successors, (9788), 7475 states have internal predecessors, (9788), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-07-19 22:50:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 15016 transitions. [2022-07-19 22:50:42,154 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 15016 transitions. Word has length 45 [2022-07-19 22:50:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:42,155 INFO L495 AbstractCegarLoop]: Abstraction has 10399 states and 15016 transitions. [2022-07-19 22:50:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 22:50:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 15016 transitions. [2022-07-19 22:50:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 22:50:42,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:42,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:50:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 22:50:42,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 80113123, now seen corresponding path program 1 times [2022-07-19 22:50:42,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:42,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322884209] [2022-07-19 22:50:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:42,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:50:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:50:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:50:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:50:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:42,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322884209] [2022-07-19 22:50:42,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322884209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:50:42,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:50:42,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:50:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994313787] [2022-07-19 22:50:42,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:50:42,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:50:42,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:50:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:50:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:50:42,452 INFO L87 Difference]: Start difference. First operand 10399 states and 15016 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:50:44,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:46,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:51,653 INFO L93 Difference]: Finished difference Result 15673 states and 23232 transitions. [2022-07-19 22:50:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:50:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-07-19 22:50:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:51,734 INFO L225 Difference]: With dead ends: 15673 [2022-07-19 22:50:51,735 INFO L226 Difference]: Without dead ends: 15652 [2022-07-19 22:50:51,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:50:51,746 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 2419 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 670 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 5758 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:51,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2705 Valid, 5758 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-07-19 22:50:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2022-07-19 22:50:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 8137. [2022-07-19 22:50:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 5661 states have (on average 1.3511747041158806) internal successors, (7649), 5853 states have internal predecessors, (7649), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-19 22:50:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11731 transitions. [2022-07-19 22:50:52,423 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11731 transitions. Word has length 52 [2022-07-19 22:50:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:52,423 INFO L495 AbstractCegarLoop]: Abstraction has 8137 states and 11731 transitions. [2022-07-19 22:50:52,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:50:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11731 transitions. [2022-07-19 22:50:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 22:50:52,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:52,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:50:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 22:50:52,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash 139061074, now seen corresponding path program 1 times [2022-07-19 22:50:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407854117] [2022-07-19 22:50:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:52,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:52,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:52,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:50:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 22:50:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:53,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:53,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 22:50:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:53,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:50:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 22:50:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407854117] [2022-07-19 22:50:53,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407854117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:50:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970646860] [2022-07-19 22:50:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:53,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:50:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:50:53,156 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) [2022-07-19 22:50:53,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 22:51:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 22:51:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:51:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:51:01,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:51:01,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970646860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:01,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:51:01,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 14 [2022-07-19 22:51:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741879447] [2022-07-19 22:51:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 22:51:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:01,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 22:51:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:51:01,499 INFO L87 Difference]: Start difference. First operand 8137 states and 11731 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:51:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:02,530 INFO L93 Difference]: Finished difference Result 10382 states and 14988 transitions. [2022-07-19 22:51:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 22:51:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-07-19 22:51:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:02,552 INFO L225 Difference]: With dead ends: 10382 [2022-07-19 22:51:02,553 INFO L226 Difference]: Without dead ends: 5817 [2022-07-19 22:51:02,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-07-19 22:51:02,567 INFO L413 NwaCegarLoop]: 1709 mSDtfsCounter, 261 mSDsluCounter, 9857 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 11566 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:02,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 11566 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 22:51:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2022-07-19 22:51:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5809. [2022-07-19 22:51:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4038 states have (on average 1.3506686478454681) internal successors, (5454), 4173 states have internal predecessors, (5454), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-07-19 22:51:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8374 transitions. [2022-07-19 22:51:03,036 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8374 transitions. Word has length 53 [2022-07-19 22:51:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:03,037 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8374 transitions. [2022-07-19 22:51:03,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-19 22:51:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8374 transitions. [2022-07-19 22:51:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 22:51:03,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:03,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:03,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 22:51:03,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:51:03,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:03,268 INFO L85 PathProgramCache]: Analyzing trace with hash 762935669, now seen corresponding path program 1 times [2022-07-19 22:51:03,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023741783] [2022-07-19 22:51:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:51:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:51:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:51:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023741783] [2022-07-19 22:51:03,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023741783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:03,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:03,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 22:51:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038233453] [2022-07-19 22:51:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:03,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:51:03,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:51:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:51:03,720 INFO L87 Difference]: Start difference. First operand 5809 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:05,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:07,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:23,808 INFO L93 Difference]: Finished difference Result 9365 states and 13991 transitions. [2022-07-19 22:51:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 22:51:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-07-19 22:51:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:23,844 INFO L225 Difference]: With dead ends: 9365 [2022-07-19 22:51:23,845 INFO L226 Difference]: Without dead ends: 8228 [2022-07-19 22:51:23,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 22:51:23,880 INFO L413 NwaCegarLoop]: 2313 mSDtfsCounter, 3172 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 7850 mSolverCounterSat, 1826 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 9678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1826 IncrementalHoareTripleChecker+Valid, 7850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:23,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 6168 Invalid, 9678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1826 Valid, 7850 Invalid, 2 Unknown, 0 Unchecked, 19.2s Time] [2022-07-19 22:51:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2022-07-19 22:51:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 5798. [2022-07-19 22:51:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 4032 states have (on average 1.3504464285714286) internal successors, (5445), 4165 states have internal predecessors, (5445), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-19 22:51:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 8356 transitions. [2022-07-19 22:51:24,371 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 8356 transitions. Word has length 64 [2022-07-19 22:51:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:24,371 INFO L495 AbstractCegarLoop]: Abstraction has 5798 states and 8356 transitions. [2022-07-19 22:51:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 8356 transitions. [2022-07-19 22:51:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 22:51:24,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:24,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:24,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 22:51:24,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1307494641, now seen corresponding path program 1 times [2022-07-19 22:51:24,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:24,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83099014] [2022-07-19 22:51:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:24,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:51:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:51:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83099014] [2022-07-19 22:51:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83099014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:24,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:24,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 22:51:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982262299] [2022-07-19 22:51:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:24,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:51:24,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:51:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 22:51:24,630 INFO L87 Difference]: Start difference. First operand 5798 states and 8356 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 22:51:26,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:31,895 INFO L93 Difference]: Finished difference Result 7437 states and 11043 transitions. [2022-07-19 22:51:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:51:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-07-19 22:51:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:31,914 INFO L225 Difference]: With dead ends: 7437 [2022-07-19 22:51:31,915 INFO L226 Difference]: Without dead ends: 7432 [2022-07-19 22:51:31,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:51:31,917 INFO L413 NwaCegarLoop]: 2049 mSDtfsCounter, 1378 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 710 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 6269 SdHoareTripleChecker+Invalid, 3136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:31,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 6269 Invalid, 3136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2425 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-07-19 22:51:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-07-19 22:51:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 5792. [2022-07-19 22:51:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 4027 states have (on average 1.3498882542835857) internal successors, (5436), 4159 states have internal predecessors, (5436), 1456 states have call successors, (1456), 313 states have call predecessors, (1456), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-19 22:51:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8346 transitions. [2022-07-19 22:51:32,517 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8346 transitions. Word has length 63 [2022-07-19 22:51:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:32,518 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 8346 transitions. [2022-07-19 22:51:32,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 22:51:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8346 transitions. [2022-07-19 22:51:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 22:51:32,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:32,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:32,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 22:51:32,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash -384487029, now seen corresponding path program 1 times [2022-07-19 22:51:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:32,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917678345] [2022-07-19 22:51:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:32,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:51:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:51:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 22:51:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917678345] [2022-07-19 22:51:32,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917678345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:51:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035457599] [2022-07-19 22:51:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:51:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:51:32,961 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) [2022-07-19 22:51:32,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 22:51:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 22:51:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:51:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:51:34,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:51:34,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035457599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:34,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:51:34,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-19 22:51:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813903693] [2022-07-19 22:51:34,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:34,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:51:34,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:51:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:51:34,069 INFO L87 Difference]: Start difference. First operand 5792 states and 8346 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:34,771 INFO L93 Difference]: Finished difference Result 7744 states and 11292 transitions. [2022-07-19 22:51:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:51:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-19 22:51:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:34,783 INFO L225 Difference]: With dead ends: 7744 [2022-07-19 22:51:34,783 INFO L226 Difference]: Without dead ends: 4324 [2022-07-19 22:51:34,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:51:34,790 INFO L413 NwaCegarLoop]: 2070 mSDtfsCounter, 962 mSDsluCounter, 7466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 9536 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:34,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 9536 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:51:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-07-19 22:51:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3544. [2022-07-19 22:51:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2468 states have (on average 1.342382495948136) internal successors, (3313), 2546 states have internal predecessors, (3313), 880 states have call successors, (880), 198 states have call predecessors, (880), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-07-19 22:51:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5072 transitions. [2022-07-19 22:51:35,142 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5072 transitions. Word has length 66 [2022-07-19 22:51:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:35,143 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5072 transitions. [2022-07-19 22:51:35,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5072 transitions. [2022-07-19 22:51:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 22:51:35,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:35,144 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:35,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 22:51:35,350 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,SelfDestructingSolverStorable9 [2022-07-19 22:51:35,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2013478679, now seen corresponding path program 1 times [2022-07-19 22:51:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:35,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982753693] [2022-07-19 22:51:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:51:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:51:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:51:35,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982753693] [2022-07-19 22:51:35,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982753693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:35,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:35,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:51:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789963830] [2022-07-19 22:51:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:51:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:51:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:51:35,682 INFO L87 Difference]: Start difference. First operand 3544 states and 5072 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:37,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:45,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:45,267 INFO L93 Difference]: Finished difference Result 6888 states and 10119 transitions. [2022-07-19 22:51:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:51:45,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-07-19 22:51:45,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:45,312 INFO L225 Difference]: With dead ends: 6888 [2022-07-19 22:51:45,312 INFO L226 Difference]: Without dead ends: 4620 [2022-07-19 22:51:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:51:45,317 INFO L413 NwaCegarLoop]: 2454 mSDtfsCounter, 1607 mSDsluCounter, 6820 mSDsCounter, 0 mSdLazyCounter, 3633 mSolverCounterSat, 814 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 9274 SdHoareTripleChecker+Invalid, 4448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3633 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:45,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 9274 Invalid, 4448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3633 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-07-19 22:51:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2022-07-19 22:51:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 3525. [2022-07-19 22:51:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2456 states have (on average 1.3424267100977199) internal successors, (3297), 2533 states have internal predecessors, (3297), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2022-07-19 22:51:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5047 transitions. [2022-07-19 22:51:45,566 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5047 transitions. Word has length 69 [2022-07-19 22:51:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:45,566 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5047 transitions. [2022-07-19 22:51:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5047 transitions. [2022-07-19 22:51:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 22:51:45,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:45,568 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 22:51:45,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1690739862, now seen corresponding path program 1 times [2022-07-19 22:51:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:45,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040866467] [2022-07-19 22:51:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:45,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:45,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:45,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:45,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:51:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:51:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:46,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:51:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:46,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-19 22:51:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 22:51:46,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:46,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040866467] [2022-07-19 22:51:46,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040866467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:46,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:46,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:51:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751338479] [2022-07-19 22:51:46,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:46,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:51:46,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:51:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:51:46,145 INFO L87 Difference]: Start difference. First operand 3525 states and 5047 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 22:51:48,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:50,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:18,986 INFO L93 Difference]: Finished difference Result 6571 states and 9626 transitions. [2022-07-19 22:52:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:52:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-07-19 22:52:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:18,997 INFO L225 Difference]: With dead ends: 6571 [2022-07-19 22:52:18,998 INFO L226 Difference]: Without dead ends: 4321 [2022-07-19 22:52:19,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:52:19,004 INFO L413 NwaCegarLoop]: 1595 mSDtfsCounter, 2088 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 14270 mSolverCounterSat, 851 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2328 SdHoareTripleChecker+Valid, 5383 SdHoareTripleChecker+Invalid, 15123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 14270 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:19,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2328 Valid, 5383 Invalid, 15123 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 14270 Invalid, 2 Unknown, 0 Unchecked, 31.9s Time] [2022-07-19 22:52:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2022-07-19 22:52:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3495. [2022-07-19 22:52:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2434 states have (on average 1.3447000821692687) internal successors, (3273), 2511 states have internal predecessors, (3273), 871 states have call successors, (871), 190 states have call predecessors, (871), 189 states have return successors, (871), 859 states have call predecessors, (871), 868 states have call successors, (871) [2022-07-19 22:52:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5015 transitions. [2022-07-19 22:52:19,307 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5015 transitions. Word has length 71 [2022-07-19 22:52:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:19,307 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5015 transitions. [2022-07-19 22:52:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 22:52:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5015 transitions. [2022-07-19 22:52:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 22:52:19,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:19,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:52:19,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 22:52:19,309 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1250189697, now seen corresponding path program 1 times [2022-07-19 22:52:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281400085] [2022-07-19 22:52:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:52:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 22:52:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 22:52:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:52:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281400085] [2022-07-19 22:52:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281400085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:19,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:19,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 22:52:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735849303] [2022-07-19 22:52:19,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 22:52:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 22:52:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:52:19,593 INFO L87 Difference]: Start difference. First operand 3495 states and 5015 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 22:52:21,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:23,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:25,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:36,922 INFO L93 Difference]: Finished difference Result 5712 states and 8436 transitions. [2022-07-19 22:52:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 22:52:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2022-07-19 22:52:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:36,942 INFO L225 Difference]: With dead ends: 5712 [2022-07-19 22:52:36,942 INFO L226 Difference]: Without dead ends: 5697 [2022-07-19 22:52:36,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 22:52:36,944 INFO L413 NwaCegarLoop]: 2105 mSDtfsCounter, 4628 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 1976 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4864 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 5365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1976 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:36,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4864 Valid, 3181 Invalid, 5365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1976 Valid, 3386 Invalid, 3 Unknown, 0 Unchecked, 16.6s Time] [2022-07-19 22:52:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2022-07-19 22:52:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 2372. [2022-07-19 22:52:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1655 states have (on average 1.3371601208459214) internal successors, (2213), 1706 states have internal predecessors, (2213), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-19 22:52:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3385 transitions. [2022-07-19 22:52:37,221 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3385 transitions. Word has length 79 [2022-07-19 22:52:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:37,222 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3385 transitions. [2022-07-19 22:52:37,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 22:52:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3385 transitions. [2022-07-19 22:52:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 22:52:37,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:37,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:52:37,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 22:52:37,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1557420679, now seen corresponding path program 1 times [2022-07-19 22:52:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:37,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453926123] [2022-07-19 22:52:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 22:52:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 22:52:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 22:52:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453926123] [2022-07-19 22:52:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453926123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:37,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 22:52:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494271457] [2022-07-19 22:52:37,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 22:52:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 22:52:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 22:52:37,772 INFO L87 Difference]: Start difference. First operand 2372 states and 3385 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:52:39,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:49,499 INFO L93 Difference]: Finished difference Result 4297 states and 6333 transitions. [2022-07-19 22:52:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 22:52:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-07-19 22:52:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:49,510 INFO L225 Difference]: With dead ends: 4297 [2022-07-19 22:52:49,510 INFO L226 Difference]: Without dead ends: 3184 [2022-07-19 22:52:49,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:52:49,515 INFO L413 NwaCegarLoop]: 2085 mSDtfsCounter, 1919 mSDsluCounter, 10415 mSDsCounter, 0 mSdLazyCounter, 5501 mSolverCounterSat, 999 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2107 SdHoareTripleChecker+Valid, 12500 SdHoareTripleChecker+Invalid, 6501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 5501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:49,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2107 Valid, 12500 Invalid, 6501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 5501 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2022-07-19 22:52:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-07-19 22:52:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2372. [2022-07-19 22:52:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1655 states have (on average 1.33595166163142) internal successors, (2211), 1706 states have internal predecessors, (2211), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-19 22:52:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3383 transitions. [2022-07-19 22:52:49,764 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3383 transitions. Word has length 77 [2022-07-19 22:52:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:49,764 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3383 transitions. [2022-07-19 22:52:49,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:52:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3383 transitions. [2022-07-19 22:52:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 22:52:49,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:49,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:52:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 22:52:49,766 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash 221854498, now seen corresponding path program 1 times [2022-07-19 22:52:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:49,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526165923] [2022-07-19 22:52:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 22:52:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 22:52:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 22:52:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526165923] [2022-07-19 22:52:49,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526165923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:49,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:49,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:52:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771714817] [2022-07-19 22:52:49,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:49,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:52:49,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:52:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:52:49,976 INFO L87 Difference]: Start difference. First operand 2372 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 22:52:52,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []