./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 23:40:58,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 23:40:58,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 23:40:58,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 23:40:58,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 23:40:58,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 23:40:58,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 23:40:58,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 23:40:58,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 23:40:58,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 23:40:58,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 23:40:58,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 23:40:58,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 23:40:58,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 23:40:58,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 23:40:58,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 23:40:58,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 23:40:58,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 23:40:58,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 23:40:58,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 23:40:58,243 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 23:40:58,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 23:40:58,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 23:40:58,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 23:40:58,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 23:40:58,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 23:40:58,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 23:40:58,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 23:40:58,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 23:40:58,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 23:40:58,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 23:40:58,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 23:40:58,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 23:40:58,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 23:40:58,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 23:40:58,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 23:40:58,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 23:40:58,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 23:40:58,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 23:40:58,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 23:40:58,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 23:40:58,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 23:40:58,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-22 23:40:58,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 23:40:58,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 23:40:58,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 23:40:58,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 23:40:58,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 23:40:58,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 23:40:58,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 23:40:58,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 23:40:58,275 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 23:40:58,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 23:40:58,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 23:40:58,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 23:40:58,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 23:40:58,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 23:40:58,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 23:40:58,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 23:40:58,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 23:40:58,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 23:40:58,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 23:40:58,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 23:40:58,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 23:40:58,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 23:40:58,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 23:40:58,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 23:40:58,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 23:40:58,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2022-07-22 23:40:58,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 23:40:58,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 23:40:58,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 23:40:58,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 23:40:58,484 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 23:40:58,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-07-22 23:40:58,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6399edb5/e202b0a1c86045d6a637cc65265bf29d/FLAGc70c98dee [2022-07-22 23:40:59,099 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 23:40:59,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-07-22 23:40:59,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6399edb5/e202b0a1c86045d6a637cc65265bf29d/FLAGc70c98dee [2022-07-22 23:40:59,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6399edb5/e202b0a1c86045d6a637cc65265bf29d [2022-07-22 23:40:59,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 23:40:59,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 23:40:59,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 23:40:59,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 23:40:59,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 23:40:59,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:40:59" (1/1) ... [2022-07-22 23:40:59,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc13549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:40:59, skipping insertion in model container [2022-07-22 23:40:59,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:40:59" (1/1) ... [2022-07-22 23:40:59,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 23:40:59,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 23:41:00,464 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-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-07-22 23:41:00,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 23:41:00,942 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 23:41:01,048 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-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-07-22 23:41:01,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 23:41:01,191 INFO L208 MainTranslator]: Completed translation [2022-07-22 23:41:01,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01 WrapperNode [2022-07-22 23:41:01,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 23:41:01,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 23:41:01,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 23:41:01,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 23:41:01,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,325 INFO L137 Inliner]: procedures = 169, calls = 721, calls flagged for inlining = 77, calls inlined = 77, statements flattened = 2029 [2022-07-22 23:41:01,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 23:41:01,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 23:41:01,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 23:41:01,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 23:41:01,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 23:41:01,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 23:41:01,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 23:41:01,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 23:41:01,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (1/1) ... [2022-07-22 23:41:01,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 23:41:01,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:01,485 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) [2022-07-22 23:41:01,486 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 [2022-07-22 23:41:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-07-22 23:41:01,508 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-07-22 23:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-22 23:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2022-07-22 23:41:01,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2022-07-22 23:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2022-07-22 23:41:01,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2022-07-22 23:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2022-07-22 23:41:01,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2022-07-22 23:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2022-07-22 23:41:01,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2022-07-22 23:41:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-22 23:41:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-22 23:41:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-22 23:41:01,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-22 23:41:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 23:41:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-07-22 23:41:01,529 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-07-22 23:41:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2022-07-22 23:41:01,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2022-07-22 23:41:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-07-22 23:41:01,529 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-07-22 23:41:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-07-22 23:41:01,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-07-22 23:41:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2022-07-22 23:41:01,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2022-07-22 23:41:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-07-22 23:41:01,530 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-07-22 23:41:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-22 23:41:01,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-22 23:41:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-22 23:41:01,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-22 23:41:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-07-22 23:41:01,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-07-22 23:41:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-07-22 23:41:01,531 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-07-22 23:41:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-07-22 23:41:01,531 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-07-22 23:41:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-22 23:41:01,531 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-22 23:41:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-07-22 23:41:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-07-22 23:41:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 23:41:01,532 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-22 23:41:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-22 23:41:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-22 23:41:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-22 23:41:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 23:41:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 23:41:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-07-22 23:41:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-07-22 23:41:01,533 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2022-07-22 23:41:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2022-07-22 23:41:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 23:41:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-07-22 23:41:01,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-07-22 23:41:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-07-22 23:41:01,535 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-07-22 23:41:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 23:41:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-07-22 23:41:01,537 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-07-22 23:41:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-07-22 23:41:01,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-07-22 23:41:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 23:41:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 23:41:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2022-07-22 23:41:01,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2022-07-22 23:41:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-07-22 23:41:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-07-22 23:41:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-07-22 23:41:01,538 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-07-22 23:41:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-07-22 23:41:01,539 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-07-22 23:41:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 23:41:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2022-07-22 23:41:01,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2022-07-22 23:41:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-07-22 23:41:01,539 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-07-22 23:41:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-07-22 23:41:01,540 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-07-22 23:41:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2022-07-22 23:41:01,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2022-07-22 23:41:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-07-22 23:41:01,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-07-22 23:41:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 23:41:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-07-22 23:41:01,540 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-07-22 23:41:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-22 23:41:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2022-07-22 23:41:01,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2022-07-22 23:41:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-07-22 23:41:01,542 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-07-22 23:41:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-07-22 23:41:01,542 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-07-22 23:41:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-07-22 23:41:01,542 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-07-22 23:41:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-07-22 23:41:01,543 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-07-22 23:41:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-07-22 23:41:01,543 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-07-22 23:41:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-07-22 23:41:01,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-07-22 23:41:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-07-22 23:41:01,544 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-07-22 23:41:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 23:41:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-07-22 23:41:01,544 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-07-22 23:41:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-22 23:41:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-22 23:41:01,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-22 23:41:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 23:41:01,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 23:41:01,921 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 23:41:01,925 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 23:41:02,039 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-22 23:41:02,465 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-07-22 23:41:03,918 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 23:41:03,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 23:41:03,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 23:41:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:03 BoogieIcfgContainer [2022-07-22 23:41:03,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 23:41:03,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 23:41:03,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 23:41:03,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 23:41:03,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:40:59" (1/3) ... [2022-07-22 23:41:03,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a06dbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:41:03, skipping insertion in model container [2022-07-22 23:41:03,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:01" (2/3) ... [2022-07-22 23:41:03,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a06dbe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:41:03, skipping insertion in model container [2022-07-22 23:41:03,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:03" (3/3) ... [2022-07-22 23:41:03,934 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-07-22 23:41:03,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 23:41:03,944 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 23:41:03,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 23:41:03,993 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@2e8c7710, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4dcec261 [2022-07-22 23:41:03,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 23:41:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 673 states, 490 states have (on average 1.3510204081632653) internal successors, (662), 514 states have internal predecessors, (662), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2022-07-22 23:41:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 23:41:04,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:04,010 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] [2022-07-22 23:41:04,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash 585131753, now seen corresponding path program 1 times [2022-07-22 23:41:04,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:04,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012946968] [2022-07-22 23:41:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:04,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:04,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 23:41:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:04,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012946968] [2022-07-22 23:41:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012946968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:04,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:04,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:04,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657297997] [2022-07-22 23:41:04,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:04,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:04,406 INFO L87 Difference]: Start difference. First operand has 673 states, 490 states have (on average 1.3510204081632653) internal successors, (662), 514 states have internal predecessors, (662), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 23:41:07,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:41:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:07,971 INFO L93 Difference]: Finished difference Result 2125 states and 3041 transitions. [2022-07-22 23:41:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 23:41:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-22 23:41:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:07,988 INFO L225 Difference]: With dead ends: 2125 [2022-07-22 23:41:07,989 INFO L226 Difference]: Without dead ends: 1433 [2022-07-22 23:41:07,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:07,999 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 1298 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:07,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 2015 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 23:41:08,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-07-22 23:41:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1283. [2022-07-22 23:41:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 943 states have (on average 1.3160127253446448) internal successors, (1241), 971 states have internal predecessors, (1241), 249 states have call successors, (249), 91 states have call predecessors, (249), 90 states have return successors, (244), 234 states have call predecessors, (244), 244 states have call successors, (244) [2022-07-22 23:41:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1734 transitions. [2022-07-22 23:41:08,088 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1734 transitions. Word has length 28 [2022-07-22 23:41:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:08,089 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 1734 transitions. [2022-07-22 23:41:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 23:41:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1734 transitions. [2022-07-22 23:41:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 23:41:08,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:08,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:08,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 23:41:08,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1772394292, now seen corresponding path program 1 times [2022-07-22 23:41:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:08,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099211076] [2022-07-22 23:41:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:08,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:08,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:08,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:08,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099211076] [2022-07-22 23:41:08,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099211076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:08,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:08,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640311008] [2022-07-22 23:41:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:08,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:08,254 INFO L87 Difference]: Start difference. First operand 1283 states and 1734 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:11,806 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 [] [2022-07-22 23:41:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:12,723 INFO L93 Difference]: Finished difference Result 4134 states and 5797 transitions. [2022-07-22 23:41:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 23:41:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-07-22 23:41:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:12,736 INFO L225 Difference]: With dead ends: 4134 [2022-07-22 23:41:12,736 INFO L226 Difference]: Without dead ends: 2858 [2022-07-22 23:41:12,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:12,741 INFO L413 NwaCegarLoop]: 1055 mSDtfsCounter, 1308 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 404 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:12,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 2134 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 711 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 23:41:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2022-07-22 23:41:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2652. [2022-07-22 23:41:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1952 states have (on average 1.3165983606557377) internal successors, (2570), 2016 states have internal predecessors, (2570), 505 states have call successors, (505), 181 states have call predecessors, (505), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2022-07-22 23:41:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3651 transitions. [2022-07-22 23:41:12,817 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3651 transitions. Word has length 38 [2022-07-22 23:41:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:12,817 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 3651 transitions. [2022-07-22 23:41:12,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3651 transitions. [2022-07-22 23:41:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 23:41:12,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:12,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:12,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 23:41:12,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -890663808, now seen corresponding path program 1 times [2022-07-22 23:41:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887079742] [2022-07-22 23:41:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:12,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:12,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887079742] [2022-07-22 23:41:12,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887079742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516892610] [2022-07-22 23:41:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:12,946 INFO L87 Difference]: Start difference. First operand 2652 states and 3651 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:14,483 INFO L93 Difference]: Finished difference Result 2850 states and 3986 transitions. [2022-07-22 23:41:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:41:14,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-22 23:41:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:14,496 INFO L225 Difference]: With dead ends: 2850 [2022-07-22 23:41:14,497 INFO L226 Difference]: Without dead ends: 2847 [2022-07-22 23:41:14,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:14,501 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 1057 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:14,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 1207 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 23:41:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2022-07-22 23:41:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2651. [2022-07-22 23:41:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1952 states have (on average 1.3160860655737705) internal successors, (2569), 2015 states have internal predecessors, (2569), 504 states have call successors, (504), 181 states have call predecessors, (504), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2022-07-22 23:41:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3649 transitions. [2022-07-22 23:41:14,601 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3649 transitions. Word has length 39 [2022-07-22 23:41:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:14,601 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 3649 transitions. [2022-07-22 23:41:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3649 transitions. [2022-07-22 23:41:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 23:41:14,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:14,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 23:41:14,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1841081417, now seen corresponding path program 1 times [2022-07-22 23:41:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:14,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992241596] [2022-07-22 23:41:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:14,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:14,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:14,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992241596] [2022-07-22 23:41:14,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992241596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:14,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:14,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754605880] [2022-07-22 23:41:14,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:14,758 INFO L87 Difference]: Start difference. First operand 2651 states and 3649 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:16,622 INFO L93 Difference]: Finished difference Result 2849 states and 3984 transitions. [2022-07-22 23:41:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:41:16,622 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-22 23:41:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:16,633 INFO L225 Difference]: With dead ends: 2849 [2022-07-22 23:41:16,633 INFO L226 Difference]: Without dead ends: 2846 [2022-07-22 23:41:16,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:16,652 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 1054 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:16,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1206 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 23:41:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2022-07-22 23:41:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2650. [2022-07-22 23:41:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2650 states, 1952 states have (on average 1.3155737704918034) internal successors, (2568), 2014 states have internal predecessors, (2568), 503 states have call successors, (503), 181 states have call predecessors, (503), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2022-07-22 23:41:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3647 transitions. [2022-07-22 23:41:16,743 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3647 transitions. Word has length 40 [2022-07-22 23:41:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:16,744 INFO L495 AbstractCegarLoop]: Abstraction has 2650 states and 3647 transitions. [2022-07-22 23:41:16,744 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3647 transitions. [2022-07-22 23:41:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 23:41:16,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:16,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 23:41:16,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1239251357, now seen corresponding path program 1 times [2022-07-22 23:41:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:16,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380857504] [2022-07-22 23:41:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:16,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:16,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:16,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380857504] [2022-07-22 23:41:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380857504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:16,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:16,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815515810] [2022-07-22 23:41:16,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:16,885 INFO L87 Difference]: Start difference. First operand 2650 states and 3647 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:18,595 INFO L93 Difference]: Finished difference Result 2848 states and 3982 transitions. [2022-07-22 23:41:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:41:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-07-22 23:41:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:18,607 INFO L225 Difference]: With dead ends: 2848 [2022-07-22 23:41:18,607 INFO L226 Difference]: Without dead ends: 2845 [2022-07-22 23:41:18,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:18,610 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 1051 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:18,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1203 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 23:41:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-07-22 23:41:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2649. [2022-07-22 23:41:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 1952 states have (on average 1.315061475409836) internal successors, (2567), 2013 states have internal predecessors, (2567), 502 states have call successors, (502), 181 states have call predecessors, (502), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2022-07-22 23:41:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3645 transitions. [2022-07-22 23:41:18,691 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3645 transitions. Word has length 41 [2022-07-22 23:41:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:18,692 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 3645 transitions. [2022-07-22 23:41:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3645 transitions. [2022-07-22 23:41:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 23:41:18,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:18,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:18,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 23:41:18,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash 237616186, now seen corresponding path program 1 times [2022-07-22 23:41:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:18,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612437415] [2022-07-22 23:41:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:18,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612437415] [2022-07-22 23:41:18,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612437415] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:18,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:18,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 23:41:18,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238982727] [2022-07-22 23:41:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:18,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:18,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 23:41:18,801 INFO L87 Difference]: Start difference. First operand 2649 states and 3645 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:20,186 INFO L93 Difference]: Finished difference Result 2847 states and 3980 transitions. [2022-07-22 23:41:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:41:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-22 23:41:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:20,198 INFO L225 Difference]: With dead ends: 2847 [2022-07-22 23:41:20,198 INFO L226 Difference]: Without dead ends: 2835 [2022-07-22 23:41:20,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 23:41:20,200 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 1048 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:20,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 1200 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 23:41:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-07-22 23:41:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2639. [2022-07-22 23:41:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 1943 states have (on average 1.314462171899125) internal successors, (2554), 2003 states have internal predecessors, (2554), 501 states have call successors, (501), 181 states have call predecessors, (501), 194 states have return successors, (576), 488 states have call predecessors, (576), 500 states have call successors, (576) [2022-07-22 23:41:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 3631 transitions. [2022-07-22 23:41:20,283 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 3631 transitions. Word has length 42 [2022-07-22 23:41:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:20,284 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 3631 transitions. [2022-07-22 23:41:20,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 23:41:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 3631 transitions. [2022-07-22 23:41:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 23:41:20,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:20,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:20,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 23:41:20,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1248888818, now seen corresponding path program 1 times [2022-07-22 23:41:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953843575] [2022-07-22 23:41:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 23:41:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 23:41:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-22 23:41:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-22 23:41:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 23:41:20,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953843575] [2022-07-22 23:41:20,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953843575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:20,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:20,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 23:41:20,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060420388] [2022-07-22 23:41:20,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:20,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 23:41:20,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 23:41:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 23:41:20,456 INFO L87 Difference]: Start difference. First operand 2639 states and 3631 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 23:41:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:21,618 INFO L93 Difference]: Finished difference Result 6410 states and 8815 transitions. [2022-07-22 23:41:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 23:41:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-07-22 23:41:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:21,635 INFO L225 Difference]: With dead ends: 6410 [2022-07-22 23:41:21,635 INFO L226 Difference]: Without dead ends: 3778 [2022-07-22 23:41:21,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-07-22 23:41:21,673 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 1146 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:21,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1969 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 23:41:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-07-22 23:41:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3412. [2022-07-22 23:41:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 2508 states have (on average 1.2934609250398723) internal successors, (3244), 2574 states have internal predecessors, (3244), 624 states have call successors, (624), 252 states have call predecessors, (624), 279 states have return successors, (737), 617 states have call predecessors, (737), 623 states have call successors, (737) [2022-07-22 23:41:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 4605 transitions. [2022-07-22 23:41:21,813 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 4605 transitions. Word has length 85 [2022-07-22 23:41:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:21,813 INFO L495 AbstractCegarLoop]: Abstraction has 3412 states and 4605 transitions. [2022-07-22 23:41:21,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 23:41:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 4605 transitions. [2022-07-22 23:41:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 23:41:21,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:21,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 23:41:21,817 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash 187651659, now seen corresponding path program 1 times [2022-07-22 23:41:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:21,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896323628] [2022-07-22 23:41:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 23:41:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:41:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-22 23:41:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 23:41:21,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:21,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896323628] [2022-07-22 23:41:21,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896323628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:21,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:21,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 23:41:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389207244] [2022-07-22 23:41:21,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:21,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 23:41:21,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 23:41:21,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 23:41:21,964 INFO L87 Difference]: Start difference. First operand 3412 states and 4605 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 23:41:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:25,494 INFO L93 Difference]: Finished difference Result 8028 states and 10877 transitions. [2022-07-22 23:41:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 23:41:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 101 [2022-07-22 23:41:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:25,513 INFO L225 Difference]: With dead ends: 8028 [2022-07-22 23:41:25,514 INFO L226 Difference]: Without dead ends: 4630 [2022-07-22 23:41:25,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-07-22 23:41:25,523 INFO L413 NwaCegarLoop]: 1045 mSDtfsCounter, 747 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:25,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 3121 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 23:41:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2022-07-22 23:41:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 4206. [2022-07-22 23:41:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 3102 states have (on average 1.2823984526112187) internal successors, (3978), 3174 states have internal predecessors, (3978), 746 states have call successors, (746), 322 states have call predecessors, (746), 357 states have return successors, (879), 741 states have call predecessors, (879), 745 states have call successors, (879) [2022-07-22 23:41:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 5603 transitions. [2022-07-22 23:41:25,665 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 5603 transitions. Word has length 101 [2022-07-22 23:41:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:25,666 INFO L495 AbstractCegarLoop]: Abstraction has 4206 states and 5603 transitions. [2022-07-22 23:41:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 23:41:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 5603 transitions. [2022-07-22 23:41:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 23:41:25,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:25,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:25,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 23:41:25,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1026312929, now seen corresponding path program 1 times [2022-07-22 23:41:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118954956] [2022-07-22 23:41:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 23:41:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 23:41:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 23:41:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 23:41:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:41:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 23:41:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-22 23:41:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-22 23:41:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 23:41:25,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:25,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118954956] [2022-07-22 23:41:25,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118954956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:25,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:25,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 23:41:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971290988] [2022-07-22 23:41:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 23:41:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 23:41:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:41:25,917 INFO L87 Difference]: Start difference. First operand 4206 states and 5603 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:41:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:31,650 INFO L93 Difference]: Finished difference Result 12216 states and 16857 transitions. [2022-07-22 23:41:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 23:41:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2022-07-22 23:41:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:31,680 INFO L225 Difference]: With dead ends: 12216 [2022-07-22 23:41:31,680 INFO L226 Difference]: Without dead ends: 8024 [2022-07-22 23:41:31,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-22 23:41:31,692 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 2162 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2253 SdHoareTripleChecker+Valid, 3809 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:31,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2253 Valid, 3809 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 23:41:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8024 states. [2022-07-22 23:41:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8024 to 7028. [2022-07-22 23:41:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7028 states, 5205 states have (on average 1.3037463976945245) internal successors, (6786), 5381 states have internal predecessors, (6786), 1224 states have call successors, (1224), 491 states have call predecessors, (1224), 598 states have return successors, (1611), 1243 states have call predecessors, (1611), 1223 states have call successors, (1611) [2022-07-22 23:41:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7028 states to 7028 states and 9621 transitions. [2022-07-22 23:41:31,965 INFO L78 Accepts]: Start accepts. Automaton has 7028 states and 9621 transitions. Word has length 116 [2022-07-22 23:41:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:31,965 INFO L495 AbstractCegarLoop]: Abstraction has 7028 states and 9621 transitions. [2022-07-22 23:41:31,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 7 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:41:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7028 states and 9621 transitions. [2022-07-22 23:41:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 23:41:31,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:31,970 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:31,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 23:41:31,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -982390427, now seen corresponding path program 1 times [2022-07-22 23:41:31,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:31,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879078448] [2022-07-22 23:41:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-22 23:41:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-22 23:41:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-22 23:41:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 23:41:32,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:32,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879078448] [2022-07-22 23:41:32,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879078448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:41:32,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910682807] [2022-07-22 23:41:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:32,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:32,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:32,162 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) [2022-07-22 23:41:32,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 23:41:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 23:41:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:41:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 23:41:32,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:41:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910682807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:32,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:41:32,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 23:41:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937711245] [2022-07-22 23:41:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:32,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 23:41:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 23:41:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:41:32,633 INFO L87 Difference]: Start difference. First operand 7028 states and 9621 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 23:41:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:33,011 INFO L93 Difference]: Finished difference Result 17818 states and 24314 transitions. [2022-07-22 23:41:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 23:41:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2022-07-22 23:41:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:33,039 INFO L225 Difference]: With dead ends: 17818 [2022-07-22 23:41:33,039 INFO L226 Difference]: Without dead ends: 10808 [2022-07-22 23:41:33,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:41:33,053 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 702 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:33,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1680 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 23:41:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10808 states. [2022-07-22 23:41:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10808 to 10800. [2022-07-22 23:41:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10800 states, 8023 states have (on average 1.3096098716190951) internal successors, (10507), 8347 states have internal predecessors, (10507), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2022-07-22 23:41:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10800 states to 10800 states and 14690 transitions. [2022-07-22 23:41:33,427 INFO L78 Accepts]: Start accepts. Automaton has 10800 states and 14690 transitions. Word has length 113 [2022-07-22 23:41:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:33,428 INFO L495 AbstractCegarLoop]: Abstraction has 10800 states and 14690 transitions. [2022-07-22 23:41:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 23:41:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10800 states and 14690 transitions. [2022-07-22 23:41:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 23:41:33,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:33,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:33,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 23:41:33,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 23:41:33,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -210210510, now seen corresponding path program 1 times [2022-07-22 23:41:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:33,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341930697] [2022-07-22 23:41:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:41:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:41:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:41:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:41:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 23:41:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:41:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-22 23:41:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-22 23:41:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 23:41:33,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341930697] [2022-07-22 23:41:33,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341930697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:33,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:41:33,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 23:41:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647061449] [2022-07-22 23:41:33,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 23:41:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 23:41:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:41:33,847 INFO L87 Difference]: Start difference. First operand 10800 states and 14690 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-22 23:41:38,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:41:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:38,730 INFO L93 Difference]: Finished difference Result 23368 states and 32291 transitions. [2022-07-22 23:41:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 23:41:38,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 132 [2022-07-22 23:41:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:38,771 INFO L225 Difference]: With dead ends: 23368 [2022-07-22 23:41:38,772 INFO L226 Difference]: Without dead ends: 12586 [2022-07-22 23:41:38,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:41:38,796 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 635 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:38,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 2601 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1201 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-22 23:41:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2022-07-22 23:41:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 10816. [2022-07-22 23:41:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10816 states, 8039 states have (on average 1.308993655927354) internal successors, (10523), 8363 states have internal predecessors, (10523), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2022-07-22 23:41:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10816 states to 10816 states and 14706 transitions. [2022-07-22 23:41:39,198 INFO L78 Accepts]: Start accepts. Automaton has 10816 states and 14706 transitions. Word has length 132 [2022-07-22 23:41:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:39,199 INFO L495 AbstractCegarLoop]: Abstraction has 10816 states and 14706 transitions. [2022-07-22 23:41:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-22 23:41:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 10816 states and 14706 transitions. [2022-07-22 23:41:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 23:41:39,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:39,205 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 23:41:39,205 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1829690478, now seen corresponding path program 1 times [2022-07-22 23:41:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:39,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747316441] [2022-07-22 23:41:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:41:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:41:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:41:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:41:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 23:41:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:41:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 23:41:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 23:41:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 23:41:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747316441] [2022-07-22 23:41:39,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747316441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:41:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46075309] [2022-07-22 23:41:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:39,395 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) [2022-07-22 23:41:39,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 23:41:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 23:41:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:41:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 23:41:40,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:41:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 23:41:40,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46075309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:41:40,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:41:40,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2022-07-22 23:41:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979155170] [2022-07-22 23:41:40,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:41:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 23:41:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 23:41:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:41:40,087 INFO L87 Difference]: Start difference. First operand 10816 states and 14706 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:41:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:44,202 INFO L93 Difference]: Finished difference Result 23464 states and 32419 transitions. [2022-07-22 23:41:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 23:41:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 134 [2022-07-22 23:41:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:44,240 INFO L225 Difference]: With dead ends: 23464 [2022-07-22 23:41:44,240 INFO L226 Difference]: Without dead ends: 12666 [2022-07-22 23:41:44,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:41:44,265 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 1084 mSDsluCounter, 3316 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:44,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 4124 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-22 23:41:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2022-07-22 23:41:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 10912. [2022-07-22 23:41:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10912 states, 8135 states have (on average 1.3053472649047326) internal successors, (10619), 8459 states have internal predecessors, (10619), 1764 states have call successors, (1764), 813 states have call predecessors, (1764), 1012 states have return successors, (2419), 1807 states have call predecessors, (2419), 1763 states have call successors, (2419) [2022-07-22 23:41:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10912 states to 10912 states and 14802 transitions. [2022-07-22 23:41:44,746 INFO L78 Accepts]: Start accepts. Automaton has 10912 states and 14802 transitions. Word has length 134 [2022-07-22 23:41:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:44,747 INFO L495 AbstractCegarLoop]: Abstraction has 10912 states and 14802 transitions. [2022-07-22 23:41:44,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:41:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10912 states and 14802 transitions. [2022-07-22 23:41:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-22 23:41:44,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:44,757 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:44,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 23:41:44,978 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,SelfDestructingSolverStorable11 [2022-07-22 23:41:44,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:44,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1425592176, now seen corresponding path program 1 times [2022-07-22 23:41:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:44,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011064185] [2022-07-22 23:41:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:41:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:41:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 23:41:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 23:41:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-22 23:41:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 23:41:45,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011064185] [2022-07-22 23:41:45,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011064185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:41:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557626131] [2022-07-22 23:41:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:45,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:45,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:41:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 23:41:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 23:41:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:41:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 23:41:45,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:41:45,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557626131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:45,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:41:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2022-07-22 23:41:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626870499] [2022-07-22 23:41:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:41:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:41:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:41:45,751 INFO L87 Difference]: Start difference. First operand 10912 states and 14802 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 23:41:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:47,180 INFO L93 Difference]: Finished difference Result 32702 states and 44367 transitions. [2022-07-22 23:41:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:41:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 138 [2022-07-22 23:41:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:47,352 INFO L225 Difference]: With dead ends: 32702 [2022-07-22 23:41:47,352 INFO L226 Difference]: Without dead ends: 32694 [2022-07-22 23:41:47,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:41:47,365 INFO L413 NwaCegarLoop]: 1310 mSDtfsCounter, 2073 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:47,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 2789 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 23:41:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32694 states. [2022-07-22 23:41:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32694 to 32660. [2022-07-22 23:41:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32660 states, 24343 states have (on average 1.3057141683440825) internal successors, (31785), 25331 states have internal predecessors, (31785), 5284 states have call successors, (5284), 2433 states have call predecessors, (5284), 3032 states have return successors, (7251), 5399 states have call predecessors, (7251), 5283 states have call successors, (7251) [2022-07-22 23:41:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32660 states to 32660 states and 44320 transitions. [2022-07-22 23:41:48,567 INFO L78 Accepts]: Start accepts. Automaton has 32660 states and 44320 transitions. Word has length 138 [2022-07-22 23:41:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:48,567 INFO L495 AbstractCegarLoop]: Abstraction has 32660 states and 44320 transitions. [2022-07-22 23:41:48,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 23:41:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 32660 states and 44320 transitions. [2022-07-22 23:41:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 23:41:48,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:48,584 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:48,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 23:41:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:48,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1442412384, now seen corresponding path program 1 times [2022-07-22 23:41:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:48,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580161264] [2022-07-22 23:41:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:41:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:41:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:41:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:41:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:48,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 23:41:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:41:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 23:41:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-22 23:41:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 23:41:49,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580161264] [2022-07-22 23:41:49,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580161264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:41:49,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821532642] [2022-07-22 23:41:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:49,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:49,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:41:49,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 23:41:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 23:41:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:41:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 23:41:49,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:41:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 23:41:49,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821532642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:41:49,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:41:49,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-07-22 23:41:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008852788] [2022-07-22 23:41:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:41:49,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 23:41:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 23:41:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-07-22 23:41:49,625 INFO L87 Difference]: Start difference. First operand 32660 states and 44320 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:41:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:55,123 INFO L93 Difference]: Finished difference Result 71136 states and 98127 transitions. [2022-07-22 23:41:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 23:41:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 140 [2022-07-22 23:41:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:55,247 INFO L225 Difference]: With dead ends: 71136 [2022-07-22 23:41:55,248 INFO L226 Difference]: Without dead ends: 38494 [2022-07-22 23:41:55,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-07-22 23:41:55,314 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 894 mSDsluCounter, 3597 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 4405 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:55,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 4405 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 23:41:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38494 states. [2022-07-22 23:41:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38494 to 33236. [2022-07-22 23:41:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33236 states, 24919 states have (on average 1.2986476182832376) internal successors, (32361), 25907 states have internal predecessors, (32361), 5284 states have call successors, (5284), 2433 states have call predecessors, (5284), 3032 states have return successors, (7251), 5399 states have call predecessors, (7251), 5283 states have call successors, (7251) [2022-07-22 23:41:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33236 states to 33236 states and 44896 transitions. [2022-07-22 23:41:56,634 INFO L78 Accepts]: Start accepts. Automaton has 33236 states and 44896 transitions. Word has length 140 [2022-07-22 23:41:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:56,635 INFO L495 AbstractCegarLoop]: Abstraction has 33236 states and 44896 transitions. [2022-07-22 23:41:56,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 13 states have internal predecessors, (121), 2 states have call successors, (30), 7 states have call predecessors, (30), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:41:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33236 states and 44896 transitions. [2022-07-22 23:41:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 23:41:56,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:56,657 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:56,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 23:41:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:56,875 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1257587451, now seen corresponding path program 1 times [2022-07-22 23:41:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990621461] [2022-07-22 23:41:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:56,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:41:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:41:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 23:41:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 23:41:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:41:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:41:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-22 23:41:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-22 23:41:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-22 23:41:57,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:41:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990621461] [2022-07-22 23:41:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990621461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:41:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42408614] [2022-07-22 23:41:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:57,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:41:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:41:57,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:41:57,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 23:41:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 23:41:57,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:41:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 23:41:57,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:41:57,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42408614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:41:57,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:41:57,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-07-22 23:41:57,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037313080] [2022-07-22 23:41:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:41:57,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 23:41:57,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:41:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 23:41:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:41:57,842 INFO L87 Difference]: Start difference. First operand 33236 states and 44896 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 23:41:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:41:58,635 INFO L93 Difference]: Finished difference Result 51074 states and 68893 transitions. [2022-07-22 23:41:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 23:41:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 148 [2022-07-22 23:41:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:41:58,688 INFO L225 Difference]: With dead ends: 51074 [2022-07-22 23:41:58,688 INFO L226 Difference]: Without dead ends: 17796 [2022-07-22 23:41:58,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:41:58,744 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 761 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:41:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1296 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 23:41:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17796 states. [2022-07-22 23:41:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17796 to 17752. [2022-07-22 23:41:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17752 states, 13308 states have (on average 1.286819957920048) internal successors, (17125), 13813 states have internal predecessors, (17125), 2815 states have call successors, (2815), 1317 states have call predecessors, (2815), 1628 states have return successors, (3828), 2873 states have call predecessors, (3828), 2814 states have call successors, (3828) [2022-07-22 23:41:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17752 states to 17752 states and 23768 transitions. [2022-07-22 23:41:59,604 INFO L78 Accepts]: Start accepts. Automaton has 17752 states and 23768 transitions. Word has length 148 [2022-07-22 23:41:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:41:59,605 INFO L495 AbstractCegarLoop]: Abstraction has 17752 states and 23768 transitions. [2022-07-22 23:41:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 23:41:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 17752 states and 23768 transitions. [2022-07-22 23:41:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 23:41:59,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:41:59,620 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:41:59,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 23:41:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 23:41:59,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:41:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:41:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash 907067735, now seen corresponding path program 1 times [2022-07-22 23:41:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:41:59,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69482142] [2022-07-22 23:41:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:41:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:41:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:41:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:41:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:41:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:41:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:41:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:41:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:41:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 23:42:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 23:42:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:42:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-22 23:42:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 23:42:00,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69482142] [2022-07-22 23:42:00,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69482142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:00,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901022599] [2022-07-22 23:42:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:00,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:00,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:00,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 23:42:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 23:42:00,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 23:42:00,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:42:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901022599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:00,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:42:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-07-22 23:42:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854404421] [2022-07-22 23:42:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 23:42:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 23:42:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:42:00,589 INFO L87 Difference]: Start difference. First operand 17752 states and 23768 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-22 23:42:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:01,487 INFO L93 Difference]: Finished difference Result 34068 states and 45773 transitions. [2022-07-22 23:42:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 23:42:01,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 150 [2022-07-22 23:42:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:01,543 INFO L225 Difference]: With dead ends: 34068 [2022-07-22 23:42:01,544 INFO L226 Difference]: Without dead ends: 17760 [2022-07-22 23:42:01,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:42:01,579 INFO L413 NwaCegarLoop]: 1416 mSDtfsCounter, 706 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:01,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 2115 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 23:42:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17760 states. [2022-07-22 23:42:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17760 to 17752. [2022-07-22 23:42:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17752 states, 13308 states have (on average 1.2835136759843704) internal successors, (17081), 13813 states have internal predecessors, (17081), 2815 states have call successors, (2815), 1317 states have call predecessors, (2815), 1628 states have return successors, (3828), 2873 states have call predecessors, (3828), 2814 states have call successors, (3828) [2022-07-22 23:42:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17752 states to 17752 states and 23724 transitions. [2022-07-22 23:42:02,315 INFO L78 Accepts]: Start accepts. Automaton has 17752 states and 23724 transitions. Word has length 150 [2022-07-22 23:42:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:02,316 INFO L495 AbstractCegarLoop]: Abstraction has 17752 states and 23724 transitions. [2022-07-22 23:42:02,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-07-22 23:42:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 17752 states and 23724 transitions. [2022-07-22 23:42:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 23:42:02,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:02,331 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:02,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 23:42:02,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 23:42:02,548 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 969107349, now seen corresponding path program 1 times [2022-07-22 23:42:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:02,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930655970] [2022-07-22 23:42:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 23:42:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 23:42:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:42:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-22 23:42:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 23:42:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:02,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930655970] [2022-07-22 23:42:02,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930655970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:02,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:42:02,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 23:42:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438494919] [2022-07-22 23:42:02,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 23:42:02,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 23:42:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 23:42:02,834 INFO L87 Difference]: Start difference. First operand 17752 states and 23724 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 23:42:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:04,665 INFO L93 Difference]: Finished difference Result 37024 states and 49924 transitions. [2022-07-22 23:42:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 23:42:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 150 [2022-07-22 23:42:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:04,737 INFO L225 Difference]: With dead ends: 37024 [2022-07-22 23:42:04,737 INFO L226 Difference]: Without dead ends: 19290 [2022-07-22 23:42:04,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:42:04,772 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 1024 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:04,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 3157 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 23:42:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19290 states. [2022-07-22 23:42:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19290 to 17899. [2022-07-22 23:42:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17899 states, 13413 states have (on average 1.281294266756132) internal successors, (17186), 13918 states have internal predecessors, (17186), 2836 states have call successors, (2836), 1317 states have call predecessors, (2836), 1649 states have return successors, (3963), 2915 states have call predecessors, (3963), 2835 states have call successors, (3963) [2022-07-22 23:42:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17899 states to 17899 states and 23985 transitions. [2022-07-22 23:42:05,507 INFO L78 Accepts]: Start accepts. Automaton has 17899 states and 23985 transitions. Word has length 150 [2022-07-22 23:42:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:05,508 INFO L495 AbstractCegarLoop]: Abstraction has 17899 states and 23985 transitions. [2022-07-22 23:42:05,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 4 states have internal predecessors, (106), 3 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 23:42:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17899 states and 23985 transitions. [2022-07-22 23:42:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 23:42:05,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:05,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 23:42:05,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1277023387, now seen corresponding path program 1 times [2022-07-22 23:42:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:05,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328257470] [2022-07-22 23:42:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 23:42:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 23:42:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-22 23:42:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 23:42:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:05,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328257470] [2022-07-22 23:42:05,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328257470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:05,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:42:05,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 23:42:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435055234] [2022-07-22 23:42:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 23:42:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 23:42:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 23:42:05,759 INFO L87 Difference]: Start difference. First operand 17899 states and 23985 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:09,793 INFO L93 Difference]: Finished difference Result 37213 states and 50311 transitions. [2022-07-22 23:42:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 23:42:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 156 [2022-07-22 23:42:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:09,855 INFO L225 Difference]: With dead ends: 37213 [2022-07-22 23:42:09,855 INFO L226 Difference]: Without dead ends: 19332 [2022-07-22 23:42:09,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:42:09,895 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 507 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:09,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 2998 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-22 23:42:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19332 states. [2022-07-22 23:42:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19332 to 17941. [2022-07-22 23:42:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17941 states, 13455 states have (on average 1.2804162021553327) internal successors, (17228), 13960 states have internal predecessors, (17228), 2836 states have call successors, (2836), 1317 states have call predecessors, (2836), 1649 states have return successors, (3963), 2915 states have call predecessors, (3963), 2835 states have call successors, (3963) [2022-07-22 23:42:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17941 states to 17941 states and 24027 transitions. [2022-07-22 23:42:10,571 INFO L78 Accepts]: Start accepts. Automaton has 17941 states and 24027 transitions. Word has length 156 [2022-07-22 23:42:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 17941 states and 24027 transitions. [2022-07-22 23:42:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 17941 states and 24027 transitions. [2022-07-22 23:42:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-22 23:42:10,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:10,584 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 23:42:10,585 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash -366564478, now seen corresponding path program 1 times [2022-07-22 23:42:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:10,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517923346] [2022-07-22 23:42:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:42:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:42:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:42:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:42:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 23:42:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:42:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 23:42:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 23:42:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-22 23:42:10,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:10,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517923346] [2022-07-22 23:42:10,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517923346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160991466] [2022-07-22 23:42:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:10,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:10,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 23:42:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 23:42:11,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-22 23:42:11,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:42:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160991466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:11,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:42:11,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2022-07-22 23:42:11,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411113012] [2022-07-22 23:42:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:11,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 23:42:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 23:42:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-07-22 23:42:11,614 INFO L87 Difference]: Start difference. First operand 17941 states and 24027 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 10 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-07-22 23:42:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:15,879 INFO L93 Difference]: Finished difference Result 48183 states and 65037 transitions. [2022-07-22 23:42:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 23:42:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 10 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 158 [2022-07-22 23:42:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:15,977 INFO L225 Difference]: With dead ends: 48183 [2022-07-22 23:42:15,977 INFO L226 Difference]: Without dead ends: 30220 [2022-07-22 23:42:16,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 23:42:16,028 INFO L413 NwaCegarLoop]: 1267 mSDtfsCounter, 2581 mSDsluCounter, 8911 mSDsCounter, 0 mSdLazyCounter, 2834 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 10178 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:16,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2626 Valid, 10178 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2834 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 23:42:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30220 states. [2022-07-22 23:42:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30220 to 24838. [2022-07-22 23:42:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24838 states, 18702 states have (on average 1.279114533205005) internal successors, (23922), 19329 states have internal predecessors, (23922), 3874 states have call successors, (3874), 1908 states have call predecessors, (3874), 2261 states have return successors, (5100), 3930 states have call predecessors, (5100), 3873 states have call successors, (5100) [2022-07-22 23:42:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24838 states to 24838 states and 32896 transitions. [2022-07-22 23:42:17,151 INFO L78 Accepts]: Start accepts. Automaton has 24838 states and 32896 transitions. Word has length 158 [2022-07-22 23:42:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:17,151 INFO L495 AbstractCegarLoop]: Abstraction has 24838 states and 32896 transitions. [2022-07-22 23:42:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 10 states have internal predecessors, (89), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-07-22 23:42:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24838 states and 32896 transitions. [2022-07-22 23:42:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-22 23:42:17,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:17,163 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:17,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 23:42:17,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:17,364 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 543401993, now seen corresponding path program 1 times [2022-07-22 23:42:17,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841935965] [2022-07-22 23:42:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:17,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 23:42:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 23:42:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-22 23:42:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 23:42:17,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:17,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841935965] [2022-07-22 23:42:17,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841935965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:17,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 23:42:17,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 23:42:17,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769417710] [2022-07-22 23:42:17,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:17,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 23:42:17,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 23:42:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 23:42:17,666 INFO L87 Difference]: Start difference. First operand 24838 states and 32896 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:23,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:42:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:24,068 INFO L93 Difference]: Finished difference Result 52132 states and 69777 transitions. [2022-07-22 23:42:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 23:42:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 157 [2022-07-22 23:42:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:24,157 INFO L225 Difference]: With dead ends: 52132 [2022-07-22 23:42:24,158 INFO L226 Difference]: Without dead ends: 27312 [2022-07-22 23:42:24,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 23:42:24,214 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 512 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:24,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 2985 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-22 23:42:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27312 states. [2022-07-22 23:42:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27312 to 24883. [2022-07-22 23:42:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24883 states, 18747 states have (on average 1.2784445511281806) internal successors, (23967), 19374 states have internal predecessors, (23967), 3874 states have call successors, (3874), 1908 states have call predecessors, (3874), 2261 states have return successors, (5100), 3930 states have call predecessors, (5100), 3873 states have call successors, (5100) [2022-07-22 23:42:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24883 states to 24883 states and 32941 transitions. [2022-07-22 23:42:25,294 INFO L78 Accepts]: Start accepts. Automaton has 24883 states and 32941 transitions. Word has length 157 [2022-07-22 23:42:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 24883 states and 32941 transitions. [2022-07-22 23:42:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24883 states and 32941 transitions. [2022-07-22 23:42:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-22 23:42:25,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:25,306 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 23:42:25,306 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -477869803, now seen corresponding path program 1 times [2022-07-22 23:42:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:25,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919861812] [2022-07-22 23:42:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-22 23:42:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-07-22 23:42:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 23:42:25,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919861812] [2022-07-22 23:42:25,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919861812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012591031] [2022-07-22 23:42:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:25,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:25,678 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:25,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 23:42:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 23:42:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 23:42:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:42:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 23:42:26,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012591031] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:26,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:42:26,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2022-07-22 23:42:26,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074574628] [2022-07-22 23:42:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:42:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:42:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:42:26,356 INFO L87 Difference]: Start difference. First operand 24883 states and 32941 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:27,315 INFO L93 Difference]: Finished difference Result 49793 states and 66129 transitions. [2022-07-22 23:42:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:42:27,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 158 [2022-07-22 23:42:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:27,393 INFO L225 Difference]: With dead ends: 49793 [2022-07-22 23:42:27,393 INFO L226 Difference]: Without dead ends: 24928 [2022-07-22 23:42:27,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:42:27,444 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 10 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:27,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1742 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 23:42:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24928 states. [2022-07-22 23:42:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24928 to 24928. [2022-07-22 23:42:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24928 states, 18792 states have (on average 1.2777777777777777) internal successors, (24012), 19419 states have internal predecessors, (24012), 3874 states have call successors, (3874), 1908 states have call predecessors, (3874), 2261 states have return successors, (5100), 3930 states have call predecessors, (5100), 3873 states have call successors, (5100) [2022-07-22 23:42:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24928 states to 24928 states and 32986 transitions. [2022-07-22 23:42:28,478 INFO L78 Accepts]: Start accepts. Automaton has 24928 states and 32986 transitions. Word has length 158 [2022-07-22 23:42:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:28,479 INFO L495 AbstractCegarLoop]: Abstraction has 24928 states and 32986 transitions. [2022-07-22 23:42:28,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-22 23:42:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24928 states and 32986 transitions. [2022-07-22 23:42:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-22 23:42:28,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:28,492 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:28,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 23:42:28,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 23:42:28,693 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1014328261, now seen corresponding path program 1 times [2022-07-22 23:42:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294217890] [2022-07-22 23:42:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:28,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 23:42:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 23:42:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 23:42:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 23:42:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294217890] [2022-07-22 23:42:29,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294217890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091842481] [2022-07-22 23:42:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:29,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:29,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:29,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 23:42:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:29,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 23:42:29,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:29,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-22 23:42:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 23:42:29,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:42:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 23:42:29,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091842481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:42:29,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:42:29,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-07-22 23:42:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710695780] [2022-07-22 23:42:29,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:42:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 23:42:29,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:29,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 23:42:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-22 23:42:29,845 INFO L87 Difference]: Start difference. First operand 24928 states and 32986 transitions. Second operand has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 10 states have internal predecessors, (150), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-22 23:42:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:32,994 INFO L93 Difference]: Finished difference Result 52357 states and 70047 transitions. [2022-07-22 23:42:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 23:42:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 10 states have internal predecessors, (150), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 159 [2022-07-22 23:42:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:33,082 INFO L225 Difference]: With dead ends: 52357 [2022-07-22 23:42:33,082 INFO L226 Difference]: Without dead ends: 27447 [2022-07-22 23:42:33,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-22 23:42:33,134 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 533 mSDsluCounter, 3870 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:33,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 4682 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 23:42:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27447 states. [2022-07-22 23:42:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27447 to 25018. [2022-07-22 23:42:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25018 states, 18882 states have (on average 1.2764537654909438) internal successors, (24102), 19509 states have internal predecessors, (24102), 3874 states have call successors, (3874), 1908 states have call predecessors, (3874), 2261 states have return successors, (5100), 3930 states have call predecessors, (5100), 3873 states have call successors, (5100) [2022-07-22 23:42:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25018 states to 25018 states and 33076 transitions. [2022-07-22 23:42:34,397 INFO L78 Accepts]: Start accepts. Automaton has 25018 states and 33076 transitions. Word has length 159 [2022-07-22 23:42:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:34,397 INFO L495 AbstractCegarLoop]: Abstraction has 25018 states and 33076 transitions. [2022-07-22 23:42:34,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.714285714285714) internal successors, (150), 10 states have internal predecessors, (150), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-22 23:42:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25018 states and 33076 transitions. [2022-07-22 23:42:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-22 23:42:34,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:34,410 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:34,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 23:42:34,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:34,614 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 719205257, now seen corresponding path program 2 times [2022-07-22 23:42:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:34,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340328762] [2022-07-22 23:42:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 23:42:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-22 23:42:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-22 23:42:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 23:42:34,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340328762] [2022-07-22 23:42:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340328762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706948914] [2022-07-22 23:42:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 23:42:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:34,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:34,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 23:42:35,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 23:42:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 23:42:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 23:42:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-22 23:42:35,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:42:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 23:42:36,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706948914] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:42:36,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:42:36,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 15 [2022-07-22 23:42:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055031524] [2022-07-22 23:42:36,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:42:36,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 23:42:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 23:42:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-22 23:42:36,033 INFO L87 Difference]: Start difference. First operand 25018 states and 33076 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 11 states have internal predecessors, (148), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-22 23:42:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:40,284 INFO L93 Difference]: Finished difference Result 53437 states and 71601 transitions. [2022-07-22 23:42:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 23:42:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 11 states have internal predecessors, (148), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 161 [2022-07-22 23:42:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:40,376 INFO L225 Difference]: With dead ends: 53437 [2022-07-22 23:42:40,376 INFO L226 Difference]: Without dead ends: 28437 [2022-07-22 23:42:40,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-07-22 23:42:40,433 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 804 mSDsluCounter, 5055 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 5873 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:40,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 5873 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 23:42:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28437 states. [2022-07-22 23:42:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28437 to 25198. [2022-07-22 23:42:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25198 states, 19062 states have (on average 1.2762039660056657) internal successors, (24327), 19689 states have internal predecessors, (24327), 3874 states have call successors, (3874), 1908 states have call predecessors, (3874), 2261 states have return successors, (5100), 3930 states have call predecessors, (5100), 3873 states have call successors, (5100) [2022-07-22 23:42:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25198 states to 25198 states and 33301 transitions. [2022-07-22 23:42:41,707 INFO L78 Accepts]: Start accepts. Automaton has 25198 states and 33301 transitions. Word has length 161 [2022-07-22 23:42:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:41,708 INFO L495 AbstractCegarLoop]: Abstraction has 25198 states and 33301 transitions. [2022-07-22 23:42:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 11 states have internal predecessors, (148), 2 states have call successors, (28), 6 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-22 23:42:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25198 states and 33301 transitions. [2022-07-22 23:42:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 23:42:41,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:41,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:41,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 23:42:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 23:42:41,935 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -629312247, now seen corresponding path program 3 times [2022-07-22 23:42:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13520686] [2022-07-22 23:42:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 23:42:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 23:42:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 23:42:42,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13520686] [2022-07-22 23:42:42,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13520686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218323019] [2022-07-22 23:42:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 23:42:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:42,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:42,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 23:42:43,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 23:42:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 23:42:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 23:42:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 23:42:43,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:42:43,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218323019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:43,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:42:43,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2022-07-22 23:42:43,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350312533] [2022-07-22 23:42:43,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:43,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 23:42:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 23:42:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-22 23:42:43,518 INFO L87 Difference]: Start difference. First operand 25198 states and 33301 transitions. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 23:42:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:47,995 INFO L93 Difference]: Finished difference Result 71413 states and 95797 transitions. [2022-07-22 23:42:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 23:42:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 163 [2022-07-22 23:42:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:48,154 INFO L225 Difference]: With dead ends: 71413 [2022-07-22 23:42:48,154 INFO L226 Difference]: Without dead ends: 48099 [2022-07-22 23:42:48,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 23:42:48,224 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 2668 mSDsluCounter, 8804 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 10077 SdHoareTripleChecker+Invalid, 3100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:48,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2683 Valid, 10077 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2751 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 23:42:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48099 states. [2022-07-22 23:42:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48099 to 35938. [2022-07-22 23:42:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35938 states, 27288 states have (on average 1.2768616241571387) internal successors, (34843), 28108 states have internal predecessors, (34843), 5509 states have call successors, (5509), 2760 states have call predecessors, (5509), 3140 states have return successors, (6876), 5516 states have call predecessors, (6876), 5508 states have call successors, (6876) [2022-07-22 23:42:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35938 states to 35938 states and 47228 transitions. [2022-07-22 23:42:50,423 INFO L78 Accepts]: Start accepts. Automaton has 35938 states and 47228 transitions. Word has length 163 [2022-07-22 23:42:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:50,423 INFO L495 AbstractCegarLoop]: Abstraction has 35938 states and 47228 transitions. [2022-07-22 23:42:50,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 5 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 23:42:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35938 states and 47228 transitions. [2022-07-22 23:42:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 23:42:50,443 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:50,443 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:50,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 23:42:50,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 23:42:50,646 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1736610279, now seen corresponding path program 1 times [2022-07-22 23:42:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:50,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981957272] [2022-07-22 23:42:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:42:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 23:42:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 23:42:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 23:42:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-22 23:42:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-22 23:42:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 23:42:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 23:42:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-07-22 23:42:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-22 23:42:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-22 23:42:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981957272] [2022-07-22 23:42:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981957272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910125973] [2022-07-22 23:42:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:50,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:50,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:50,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 23:42:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 23:42:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 23:42:51,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:42:51,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910125973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:42:51,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:42:51,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 12 [2022-07-22 23:42:51,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213224922] [2022-07-22 23:42:51,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:42:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 23:42:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 23:42:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:42:51,648 INFO L87 Difference]: Start difference. First operand 35938 states and 47228 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:42:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:42:54,453 INFO L93 Difference]: Finished difference Result 79582 states and 106219 transitions. [2022-07-22 23:42:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 23:42:54,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 179 [2022-07-22 23:42:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:42:54,566 INFO L225 Difference]: With dead ends: 79582 [2022-07-22 23:42:54,566 INFO L226 Difference]: Without dead ends: 43662 [2022-07-22 23:42:54,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:42:54,621 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 463 mSDsluCounter, 4116 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 23:42:54,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 5267 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 23:42:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43662 states. [2022-07-22 23:42:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43662 to 36136. [2022-07-22 23:42:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36136 states, 27486 states have (on average 1.274867205122608) internal successors, (35041), 28240 states have internal predecessors, (35041), 5509 states have call successors, (5509), 2760 states have call predecessors, (5509), 3140 states have return successors, (6876), 5582 states have call predecessors, (6876), 5508 states have call successors, (6876) [2022-07-22 23:42:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36136 states to 36136 states and 47426 transitions. [2022-07-22 23:42:56,658 INFO L78 Accepts]: Start accepts. Automaton has 36136 states and 47426 transitions. Word has length 179 [2022-07-22 23:42:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:42:56,659 INFO L495 AbstractCegarLoop]: Abstraction has 36136 states and 47426 transitions. [2022-07-22 23:42:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 states have internal predecessors, (103), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-22 23:42:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 36136 states and 47426 transitions. [2022-07-22 23:42:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-22 23:42:56,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:42:56,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:42:56,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 23:42:56,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 23:42:56,896 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:42:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:42:56,896 INFO L85 PathProgramCache]: Analyzing trace with hash 477329836, now seen corresponding path program 1 times [2022-07-22 23:42:56,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:42:56,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728835063] [2022-07-22 23:42:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:42:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:42:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:42:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:42:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:42:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:42:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 23:42:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:42:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:42:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-07-22 23:42:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:42:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-22 23:42:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-22 23:42:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 23:42:57,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:42:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728835063] [2022-07-22 23:42:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728835063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:42:57,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104187408] [2022-07-22 23:42:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:42:57,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:42:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:42:57,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:42:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 23:42:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:42:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 23:42:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:42:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 23:42:58,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:42:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 23:42:58,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104187408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:42:58,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:42:58,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 8] total 19 [2022-07-22 23:42:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782591488] [2022-07-22 23:42:58,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:42:58,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 23:42:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:42:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 23:42:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 23:42:58,382 INFO L87 Difference]: Start difference. First operand 36136 states and 47426 transitions. Second operand has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 14 states have internal predecessors, (169), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 23:43:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:43:04,815 INFO L93 Difference]: Finished difference Result 77260 states and 102533 transitions. [2022-07-22 23:43:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 23:43:04,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 14 states have internal predecessors, (169), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 181 [2022-07-22 23:43:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:43:04,926 INFO L225 Difference]: With dead ends: 77260 [2022-07-22 23:43:04,926 INFO L226 Difference]: Without dead ends: 40866 [2022-07-22 23:43:04,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-07-22 23:43:04,983 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 952 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 23:43:04,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 5531 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 3411 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 23:43:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40866 states. [2022-07-22 23:43:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40866 to 35110. [2022-07-22 23:43:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35110 states, 26799 states have (on average 1.2689279450725774) internal successors, (34006), 27388 states have internal predecessors, (34006), 5326 states have call successors, (5326), 2760 states have call predecessors, (5326), 2984 states have return successors, (6042), 5336 states have call predecessors, (6042), 5325 states have call successors, (6042) [2022-07-22 23:43:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35110 states to 35110 states and 45374 transitions. [2022-07-22 23:43:07,032 INFO L78 Accepts]: Start accepts. Automaton has 35110 states and 45374 transitions. Word has length 181 [2022-07-22 23:43:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:43:07,033 INFO L495 AbstractCegarLoop]: Abstraction has 35110 states and 45374 transitions. [2022-07-22 23:43:07,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.894736842105264) internal successors, (169), 14 states have internal predecessors, (169), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 23:43:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35110 states and 45374 transitions. [2022-07-22 23:43:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 23:43:07,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:43:07,051 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:43:07,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 23:43:07,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 23:43:07,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:43:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:43:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1477864991, now seen corresponding path program 2 times [2022-07-22 23:43:07,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:43:07,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868155936] [2022-07-22 23:43:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:43:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:43:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:43:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:43:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:43:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 23:43:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 23:43:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-22 23:43:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-22 23:43:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-22 23:43:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-22 23:43:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-22 23:43:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:43:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-22 23:43:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-22 23:43:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-07-22 23:43:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-22 23:43:07,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:43:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868155936] [2022-07-22 23:43:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868155936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:43:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23203109] [2022-07-22 23:43:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 23:43:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:43:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:43:07,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:43:07,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 23:43:08,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 23:43:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 23:43:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 23:43:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:43:08,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 23:43:08,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 23:43:08,712 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 23:43:08,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 23:43:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 23:43:08,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 23:43:08,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 23:43:08,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 23:43:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 23:43:08,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:43:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-22 23:43:09,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23203109] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 23:43:09,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:43:09,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 17] total 34 [2022-07-22 23:43:09,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313343995] [2022-07-22 23:43:09,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:43:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 23:43:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:43:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 23:43:09,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 23:43:09,437 INFO L87 Difference]: Start difference. First operand 35110 states and 45374 transitions. Second operand has 11 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 23:43:16,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:43:17,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:43:21,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:43:22,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 23:43:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:43:25,205 INFO L93 Difference]: Finished difference Result 105611 states and 138182 transitions. [2022-07-22 23:43:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 23:43:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 185 [2022-07-22 23:43:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:43:25,428 INFO L225 Difference]: With dead ends: 105611 [2022-07-22 23:43:25,429 INFO L226 Difference]: Without dead ends: 70499 [2022-07-22 23:43:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 23:43:25,508 INFO L413 NwaCegarLoop]: 1120 mSDtfsCounter, 2874 mSDsluCounter, 4135 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 733 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2943 SdHoareTripleChecker+Valid, 5255 SdHoareTripleChecker+Invalid, 3795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-07-22 23:43:25,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2943 Valid, 5255 Invalid, 3795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 3061 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2022-07-22 23:43:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70499 states. [2022-07-22 23:43:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70499 to 39998. [2022-07-22 23:43:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39998 states, 30532 states have (on average 1.2665072710598717) internal successors, (38669), 31194 states have internal predecessors, (38669), 6106 states have call successors, (6106), 3123 states have call predecessors, (6106), 3359 states have return successors, (6921), 6094 states have call predecessors, (6921), 6105 states have call successors, (6921) [2022-07-22 23:43:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39998 states to 39998 states and 51696 transitions. [2022-07-22 23:43:28,625 INFO L78 Accepts]: Start accepts. Automaton has 39998 states and 51696 transitions. Word has length 185 [2022-07-22 23:43:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:43:28,626 INFO L495 AbstractCegarLoop]: Abstraction has 39998 states and 51696 transitions. [2022-07-22 23:43:28,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 23:43:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 39998 states and 51696 transitions. [2022-07-22 23:43:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 23:43:28,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:43:28,646 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:43:28,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 23:43:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:43:28,853 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:43:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:43:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1339784126, now seen corresponding path program 2 times [2022-07-22 23:43:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:43:28,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384896735] [2022-07-22 23:43:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:43:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:43:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:43:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:43:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:43:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:43:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:43:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 23:43:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-22 23:43:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:43:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-22 23:43:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-07-22 23:43:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 23:43:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 23:43:29,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:43:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384896735] [2022-07-22 23:43:29,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384896735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:43:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002662968] [2022-07-22 23:43:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 23:43:29,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:43:29,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:43:29,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:43:29,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 23:43:30,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 23:43:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 23:43:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2290 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 23:43:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:43:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 23:43:30,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:43:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-22 23:43:31,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002662968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 23:43:31,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 23:43:31,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2022-07-22 23:43:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829189243] [2022-07-22 23:43:31,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 23:43:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 23:43:31,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:43:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 23:43:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-07-22 23:43:31,101 INFO L87 Difference]: Start difference. First operand 39998 states and 51696 transitions. Second operand has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 22 states have internal predecessors, (178), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 23:43:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:43:41,766 INFO L93 Difference]: Finished difference Result 86721 states and 113803 transitions. [2022-07-22 23:43:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 23:43:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 22 states have internal predecessors, (178), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 184 [2022-07-22 23:43:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:43:41,901 INFO L225 Difference]: With dead ends: 86721 [2022-07-22 23:43:41,901 INFO L226 Difference]: Without dead ends: 46093 [2022-07-22 23:43:41,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 23:43:41,973 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 926 mSDsluCounter, 8225 mSDsCounter, 0 mSdLazyCounter, 5977 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 9025 SdHoareTripleChecker+Invalid, 6584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 5977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-22 23:43:41,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 9025 Invalid, 6584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 5977 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-07-22 23:43:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46093 states. [2022-07-22 23:43:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46093 to 40403. [2022-07-22 23:43:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40403 states, 30937 states have (on average 1.26301839221644) internal successors, (39074), 31599 states have internal predecessors, (39074), 6106 states have call successors, (6106), 3123 states have call predecessors, (6106), 3359 states have return successors, (6921), 6094 states have call predecessors, (6921), 6105 states have call successors, (6921) [2022-07-22 23:43:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40403 states to 40403 states and 52101 transitions. [2022-07-22 23:43:44,944 INFO L78 Accepts]: Start accepts. Automaton has 40403 states and 52101 transitions. Word has length 184 [2022-07-22 23:43:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:43:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 40403 states and 52101 transitions. [2022-07-22 23:43:44,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.592592592592593) internal successors, (178), 22 states have internal predecessors, (178), 2 states have call successors, (37), 7 states have call predecessors, (37), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-22 23:43:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 40403 states and 52101 transitions. [2022-07-22 23:43:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-22 23:43:44,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:43:44,966 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:43:44,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 23:43:45,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 23:43:45,166 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:43:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:43:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash 332153516, now seen corresponding path program 3 times [2022-07-22 23:43:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:43:45,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230225483] [2022-07-22 23:43:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:43:45,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:43:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:43:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:43:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:43:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:43:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:43:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:45,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 23:43:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-22 23:43:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:43:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:43:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-22 23:43:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:43:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-22 23:43:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-07-22 23:43:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:43:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 23:43:46,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:43:46,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230225483] [2022-07-22 23:43:46,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230225483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:43:46,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555832943] [2022-07-22 23:43:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 23:43:46,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:43:46,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:43:46,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:43:46,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 23:43:47,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 23:43:47,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 23:43:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 2044 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 23:43:47,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:43:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-22 23:43:48,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 23:43:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 23:43:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555832943] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 23:43:48,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 23:43:48,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17, 16] total 39 [2022-07-22 23:43:48,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983891605] [2022-07-22 23:43:48,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:43:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 23:43:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:43:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 23:43:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 23:43:48,964 INFO L87 Difference]: Start difference. First operand 40403 states and 52101 transitions. Second operand has 11 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 23:43:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:43:55,861 INFO L93 Difference]: Finished difference Result 98079 states and 127084 transitions. [2022-07-22 23:43:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 23:43:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 189 [2022-07-22 23:43:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:43:56,050 INFO L225 Difference]: With dead ends: 98079 [2022-07-22 23:43:56,051 INFO L226 Difference]: Without dead ends: 60448 [2022-07-22 23:43:56,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 23:43:56,131 INFO L413 NwaCegarLoop]: 1074 mSDtfsCounter, 2012 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 2679 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 4547 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:43:56,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2053 Valid, 4547 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2679 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 23:43:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60448 states. [2022-07-22 23:43:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60448 to 48228. [2022-07-22 23:43:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48228 states, 36926 states have (on average 1.2633374857823756) internal successors, (46650), 37720 states have internal predecessors, (46650), 7327 states have call successors, (7327), 3720 states have call predecessors, (7327), 3974 states have return successors, (8271), 7279 states have call predecessors, (8271), 7326 states have call successors, (8271) [2022-07-22 23:43:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48228 states to 48228 states and 62248 transitions. [2022-07-22 23:43:59,925 INFO L78 Accepts]: Start accepts. Automaton has 48228 states and 62248 transitions. Word has length 189 [2022-07-22 23:43:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:43:59,925 INFO L495 AbstractCegarLoop]: Abstraction has 48228 states and 62248 transitions. [2022-07-22 23:43:59,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-22 23:43:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48228 states and 62248 transitions. [2022-07-22 23:43:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-22 23:43:59,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:43:59,948 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:43:59,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 23:44:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 23:44:00,149 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:44:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:44:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1543204880, now seen corresponding path program 1 times [2022-07-22 23:44:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:44:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261843609] [2022-07-22 23:44:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:44:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:44:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:44:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:44:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:44:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:44:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 23:44:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 23:44:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-22 23:44:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:44:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 23:44:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-22 23:44:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:44:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 23:44:00,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:44:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261843609] [2022-07-22 23:44:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261843609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:44:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793562605] [2022-07-22 23:44:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:00,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:44:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:44:00,567 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:44:00,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 23:44:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 23:44:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:44:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-22 23:44:01,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:44:01,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793562605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:44:01,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:44:01,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-07-22 23:44:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134744] [2022-07-22 23:44:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:44:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 23:44:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:44:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 23:44:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:44:01,743 INFO L87 Difference]: Start difference. First operand 48228 states and 62248 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-07-22 23:44:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:44:06,274 INFO L93 Difference]: Finished difference Result 112093 states and 145084 transitions. [2022-07-22 23:44:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 23:44:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 190 [2022-07-22 23:44:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:44:06,479 INFO L225 Difference]: With dead ends: 112093 [2022-07-22 23:44:06,480 INFO L226 Difference]: Without dead ends: 63883 [2022-07-22 23:44:06,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:44:06,571 INFO L413 NwaCegarLoop]: 1013 mSDtfsCounter, 758 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:44:06,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1758 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 23:44:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63883 states. [2022-07-22 23:44:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63883 to 58863. [2022-07-22 23:44:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58863 states, 45241 states have (on average 1.2777790057691032) internal successors, (57808), 46294 states have internal predecessors, (57808), 8726 states have call successors, (8726), 4588 states have call predecessors, (8726), 4895 states have return successors, (9785), 8636 states have call predecessors, (9785), 8725 states have call successors, (9785) [2022-07-22 23:44:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58863 states to 58863 states and 76319 transitions. [2022-07-22 23:44:11,177 INFO L78 Accepts]: Start accepts. Automaton has 58863 states and 76319 transitions. Word has length 190 [2022-07-22 23:44:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:44:11,177 INFO L495 AbstractCegarLoop]: Abstraction has 58863 states and 76319 transitions. [2022-07-22 23:44:11,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-07-22 23:44:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 58863 states and 76319 transitions. [2022-07-22 23:44:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-22 23:44:11,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:44:11,206 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:44:11,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 23:44:11,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:44:11,419 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:44:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:44:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 960995746, now seen corresponding path program 1 times [2022-07-22 23:44:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:44:11,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618140494] [2022-07-22 23:44:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:44:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:44:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:44:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:44:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:44:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:44:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 23:44:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 23:44:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-22 23:44:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:44:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-22 23:44:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-22 23:44:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-07-22 23:44:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 23:44:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-22 23:44:11,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:44:11,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618140494] [2022-07-22 23:44:11,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618140494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:44:11,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395886420] [2022-07-22 23:44:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:44:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:44:11,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:44:11,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 23:44:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 23:44:12,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:44:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 23:44:13,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:44:13,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395886420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:44:13,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:44:13,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-07-22 23:44:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946825499] [2022-07-22 23:44:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:44:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 23:44:13,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:44:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 23:44:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:44:13,096 INFO L87 Difference]: Start difference. First operand 58863 states and 76319 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-22 23:44:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:44:17,275 INFO L93 Difference]: Finished difference Result 105246 states and 136504 transitions. [2022-07-22 23:44:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 23:44:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 205 [2022-07-22 23:44:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:44:17,398 INFO L225 Difference]: With dead ends: 105246 [2022-07-22 23:44:17,398 INFO L226 Difference]: Without dead ends: 47531 [2022-07-22 23:44:17,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-07-22 23:44:17,487 INFO L413 NwaCegarLoop]: 1071 mSDtfsCounter, 1434 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 23:44:17,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 1270 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 23:44:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47531 states. [2022-07-22 23:44:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47531 to 47092. [2022-07-22 23:44:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47092 states, 36525 states have (on average 1.276769336071184) internal successors, (46634), 37307 states have internal predecessors, (46634), 6719 states have call successors, (6719), 3599 states have call predecessors, (6719), 3847 states have return successors, (7564), 6677 states have call predecessors, (7564), 6718 states have call successors, (7564) [2022-07-22 23:44:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47092 states to 47092 states and 60917 transitions. [2022-07-22 23:44:21,130 INFO L78 Accepts]: Start accepts. Automaton has 47092 states and 60917 transitions. Word has length 205 [2022-07-22 23:44:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 23:44:21,130 INFO L495 AbstractCegarLoop]: Abstraction has 47092 states and 60917 transitions. [2022-07-22 23:44:21,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-22 23:44:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 47092 states and 60917 transitions. [2022-07-22 23:44:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-22 23:44:21,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 23:44:21,160 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 23:44:21,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 23:44:21,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:44:21,383 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 23:44:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 23:44:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1824957565, now seen corresponding path program 1 times [2022-07-22 23:44:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 23:44:21,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386078108] [2022-07-22 23:44:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:21,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 23:44:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 23:44:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 23:44:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 23:44:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 23:44:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 23:44:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 23:44:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-22 23:44:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 23:44:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 23:44:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-22 23:44:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-22 23:44:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-22 23:44:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-07-22 23:44:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-22 23:44:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 23:44:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-07-22 23:44:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-07-22 23:44:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 23:44:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 23:44:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386078108] [2022-07-22 23:44:21,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386078108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 23:44:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603617493] [2022-07-22 23:44:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 23:44:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 23:44:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 23:44:21,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 23:44:21,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 23:44:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 23:44:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 23:44:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 23:44:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 23:44:23,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 23:44:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603617493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 23:44:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 23:44:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2022-07-22 23:44:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268221829] [2022-07-22 23:44:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 23:44:23,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 23:44:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 23:44:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 23:44:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:44:23,052 INFO L87 Difference]: Start difference. First operand 47092 states and 60917 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-22 23:44:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 23:44:27,163 INFO L93 Difference]: Finished difference Result 106500 states and 140278 transitions. [2022-07-22 23:44:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 23:44:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 222 [2022-07-22 23:44:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 23:44:27,382 INFO L225 Difference]: With dead ends: 106500 [2022-07-22 23:44:27,382 INFO L226 Difference]: Without dead ends: 61255 [2022-07-22 23:44:27,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-22 23:44:27,474 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 234 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 23:44:27,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 2113 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 23:44:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61255 states.