./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 23:19:40,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 23:19:40,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 23:19:40,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 23:19:40,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 23:19:40,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 23:19:40,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 23:19:40,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 23:19:40,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 23:19:40,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 23:19:40,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 23:19:40,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 23:19:40,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 23:19:40,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 23:19:40,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 23:19:40,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 23:19:40,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 23:19:40,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 23:19:40,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 23:19:40,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 23:19:40,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 23:19:40,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 23:19:40,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 23:19:40,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 23:19:40,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 23:19:40,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 23:19:40,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 23:19:40,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 23:19:40,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 23:19:40,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 23:19:40,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 23:19:40,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 23:19:40,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 23:19:40,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 23:19:40,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 23:19:40,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 23:19:40,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 23:19:40,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 23:19:40,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 23:19:40,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 23:19:40,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 23:19:40,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 23:19:40,476 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 23:19:40,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 23:19:40,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 23:19:40,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 23:19:40,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 23:19:40,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 23:19:40,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 23:19:40,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 23:19:40,478 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 23:19:40,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 23:19:40,478 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 23:19:40,479 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 23:19:40,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 23:19:40,480 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 23:19:40,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 23:19:40,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 23:19:40,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 23:19:40,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:19:40,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 23:19:40,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 23:19:40,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 23:19:40,482 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 23:19:40,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 23:19:40,482 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 23:19:40,482 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2023-02-17 23:19:40,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 23:19:40,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 23:19:40,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 23:19:40,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 23:19:40,669 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 23:19:40,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-17 23:19:41,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 23:19:41,860 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 23:19:41,860 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-17 23:19:41,867 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf81471aa/3963152f4f3f4c50b4b8703d9109c7dc/FLAGf14d37ce0 [2023-02-17 23:19:41,876 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf81471aa/3963152f4f3f4c50b4b8703d9109c7dc [2023-02-17 23:19:41,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 23:19:41,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 23:19:41,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 23:19:41,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 23:19:41,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 23:19:41,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:19:41" (1/1) ... [2023-02-17 23:19:41,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbcec11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:41, skipping insertion in model container [2023-02-17 23:19:41,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:19:41" (1/1) ... [2023-02-17 23:19:41,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 23:19:41,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 23:19:42,138 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2023-02-17 23:19:42,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:19:42,149 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 23:19:42,172 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2023-02-17 23:19:42,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:19:42,213 INFO L208 MainTranslator]: Completed translation [2023-02-17 23:19:42,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42 WrapperNode [2023-02-17 23:19:42,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 23:19:42,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 23:19:42,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 23:19:42,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 23:19:42,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,244 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2023-02-17 23:19:42,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 23:19:42,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 23:19:42,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 23:19:42,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 23:19:42,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,262 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 23:19:42,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 23:19:42,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 23:19:42,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 23:19:42,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (1/1) ... [2023-02-17 23:19:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:19:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:19:42,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 23:19:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 23:19:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 23:19:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 23:19:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-17 23:19:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-17 23:19:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 23:19:42,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 23:19:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 23:19:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 23:19:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 23:19:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 23:19:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 23:19:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 23:19:42,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 23:19:42,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 23:19:42,386 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 23:19:42,387 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 23:19:42,604 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 23:19:42,608 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 23:19:42,609 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 23:19:42,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:19:42 BoogieIcfgContainer [2023-02-17 23:19:42,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 23:19:42,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 23:19:42,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 23:19:42,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 23:19:42,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 11:19:41" (1/3) ... [2023-02-17 23:19:42,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608919b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:19:42, skipping insertion in model container [2023-02-17 23:19:42,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:19:42" (2/3) ... [2023-02-17 23:19:42,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608919b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:19:42, skipping insertion in model container [2023-02-17 23:19:42,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:19:42" (3/3) ... [2023-02-17 23:19:42,616 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2023-02-17 23:19:42,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 23:19:42,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 23:19:42,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 23:19:42,691 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25d2be22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 23:19:42,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 23:19:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 23:19:42,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:42,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:42,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 308507763, now seen corresponding path program 1 times [2023-02-17 23:19:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:42,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209939654] [2023-02-17 23:19:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:42,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 23:19:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:19:42,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209939654] [2023-02-17 23:19:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209939654] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:19:42,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:19:42,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 23:19:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860292661] [2023-02-17 23:19:42,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:19:42,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 23:19:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 23:19:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:19:42,954 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 23:19:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:42,995 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2023-02-17 23:19:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 23:19:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-17 23:19:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:43,001 INFO L225 Difference]: With dead ends: 57 [2023-02-17 23:19:43,001 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 23:19:43,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:19:43,005 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:43,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:19:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 23:19:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-17 23:19:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-17 23:19:43,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2023-02-17 23:19:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:43,029 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-17 23:19:43,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 23:19:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-17 23:19:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 23:19:43,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:43,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 23:19:43,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:43,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2109805219, now seen corresponding path program 1 times [2023-02-17 23:19:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:43,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992716242] [2023-02-17 23:19:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 23:19:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:19:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992716242] [2023-02-17 23:19:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992716242] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:19:43,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:19:43,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 23:19:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630362840] [2023-02-17 23:19:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:19:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 23:19:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 23:19:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:19:43,208 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 23:19:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:43,254 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-02-17 23:19:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 23:19:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-17 23:19:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:43,257 INFO L225 Difference]: With dead ends: 50 [2023-02-17 23:19:43,258 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 23:19:43,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:19:43,260 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:43,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 70 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:19:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 23:19:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-02-17 23:19:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-17 23:19:43,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2023-02-17 23:19:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:43,271 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-17 23:19:43,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 23:19:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-17 23:19:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 23:19:43,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:43,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:43,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 23:19:43,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash 493100305, now seen corresponding path program 1 times [2023-02-17 23:19:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121338864] [2023-02-17 23:19:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:43,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-17 23:19:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:19:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121338864] [2023-02-17 23:19:43,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121338864] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:19:43,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:19:43,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 23:19:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390754727] [2023-02-17 23:19:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:19:43,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 23:19:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 23:19:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:19:43,417 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:43,461 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-02-17 23:19:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 23:19:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-17 23:19:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:43,462 INFO L225 Difference]: With dead ends: 55 [2023-02-17 23:19:43,463 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 23:19:43,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:19:43,465 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:43,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 69 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:19:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 23:19:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-02-17 23:19:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:19:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-17 23:19:43,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2023-02-17 23:19:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-17 23:19:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-17 23:19:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 23:19:43,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:43,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:43,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 23:19:43,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1095247597, now seen corresponding path program 1 times [2023-02-17 23:19:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049687077] [2023-02-17 23:19:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-17 23:19:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:19:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049687077] [2023-02-17 23:19:43,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049687077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:43,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013620983] [2023-02-17 23:19:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:43,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:19:43,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:19:43,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 23:19:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 23:19:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:19:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:19:43,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:19:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:19:43,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013620983] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:19:43,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:19:43,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-17 23:19:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47713860] [2023-02-17 23:19:43,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:19:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 23:19:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 23:19:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 23:19:43,757 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 23:19:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:43,789 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-02-17 23:19:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 23:19:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-02-17 23:19:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:43,790 INFO L225 Difference]: With dead ends: 51 [2023-02-17 23:19:43,790 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 23:19:43,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 23:19:43,792 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:43,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:19:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 23:19:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 23:19:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:19:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-17 23:19:43,795 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2023-02-17 23:19:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:43,796 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-17 23:19:43,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 23:19:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-17 23:19:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 23:19:43,797 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:43,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:43,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 23:19:44,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:44,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -292922041, now seen corresponding path program 1 times [2023-02-17 23:19:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:44,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000860717] [2023-02-17 23:19:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 23:19:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 23:19:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 23:19:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:44,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000860717] [2023-02-17 23:19:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000860717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:19:44,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:19:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 23:19:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169725248] [2023-02-17 23:19:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:19:44,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 23:19:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 23:19:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-17 23:19:44,292 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:44,374 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-02-17 23:19:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 23:19:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-02-17 23:19:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:44,376 INFO L225 Difference]: With dead ends: 45 [2023-02-17 23:19:44,376 INFO L226 Difference]: Without dead ends: 42 [2023-02-17 23:19:44,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-02-17 23:19:44,377 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 130 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 23:19:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-17 23:19:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-17 23:19:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:19:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-02-17 23:19:44,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2023-02-17 23:19:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:44,382 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-02-17 23:19:44,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 23:19:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-02-17 23:19:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 23:19:44,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:44,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:19:44,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 23:19:44,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash -292920367, now seen corresponding path program 1 times [2023-02-17 23:19:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458966210] [2023-02-17 23:19:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 23:19:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 23:19:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:19:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:44,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458966210] [2023-02-17 23:19:44,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458966210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261498072] [2023-02-17 23:19:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:44,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:19:44,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:19:44,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 23:19:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 23:19:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:19:45,058 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-17 23:19:45,093 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= |node_create_~temp~0#1.base| (+ (- 1) |c_#StackHeapBarrier|)) (exists ((v_ArrVal_652 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_652))))) is different from true [2023-02-17 23:19:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:45,113 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2023-02-17 23:19:45,132 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2023-02-17 23:19:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-02-17 23:19:45,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:19:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261498072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:45,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 23:19:45,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2023-02-17 23:19:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577285289] [2023-02-17 23:19:45,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 23:19:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 23:19:45,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 23:19:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=565, Unknown=6, NotChecked=48, Total=702 [2023-02-17 23:19:45,197 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 23:19:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:45,444 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-02-17 23:19:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 23:19:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-02-17 23:19:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:45,445 INFO L225 Difference]: With dead ends: 58 [2023-02-17 23:19:45,445 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 23:19:45,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=891, Unknown=6, NotChecked=62, Total=1122 [2023-02-17 23:19:45,446 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:45,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 173 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 285 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2023-02-17 23:19:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 23:19:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 23:19:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:19:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-02-17 23:19:45,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 37 [2023-02-17 23:19:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:45,450 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-02-17 23:19:45,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 19 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 23:19:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-02-17 23:19:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 23:19:45,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:45,450 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 23:19:45,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 23:19:45,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 23:19:45,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1499731437, now seen corresponding path program 1 times [2023-02-17 23:19:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:45,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015760634] [2023-02-17 23:19:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:45,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:45,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 23:19:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:46,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 23:19:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 23:19:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015760634] [2023-02-17 23:19:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015760634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799317438] [2023-02-17 23:19:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:46,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:19:46,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:19:46,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 23:19:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:46,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 23:19:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:19:46,359 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2023-02-17 23:19:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:46,409 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 17 [2023-02-17 23:19:46,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:46,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 72 [2023-02-17 23:19:46,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:46,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 105 [2023-02-17 23:19:46,501 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:19:46,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 126 treesize of output 90 [2023-02-17 23:19:46,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:46,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 87 [2023-02-17 23:19:46,894 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2023-02-17 23:19:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 23:19:46,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:19:47,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799317438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:47,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 23:19:47,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2023-02-17 23:19:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998960270] [2023-02-17 23:19:47,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 23:19:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 23:19:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:19:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 23:19:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1128, Unknown=17, NotChecked=0, Total=1260 [2023-02-17 23:19:47,100 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 23:19:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:19:47,535 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-17 23:19:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 23:19:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2023-02-17 23:19:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:19:47,536 INFO L225 Difference]: With dead ends: 52 [2023-02-17 23:19:47,536 INFO L226 Difference]: Without dead ends: 49 [2023-02-17 23:19:47,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=376, Invalid=2157, Unknown=17, NotChecked=0, Total=2550 [2023-02-17 23:19:47,537 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 263 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 23:19:47,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 140 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 23:19:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-17 23:19:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2023-02-17 23:19:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 23:19:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-02-17 23:19:47,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 40 [2023-02-17 23:19:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:19:47,546 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-02-17 23:19:47,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 23:19:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-02-17 23:19:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 23:19:47,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:19:47,547 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 23:19:47,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 23:19:47,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:47,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:19:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:19:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1499729763, now seen corresponding path program 1 times [2023-02-17 23:19:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:19:47,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284999634] [2023-02-17 23:19:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:47,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:19:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 23:19:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:48,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 23:19:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-17 23:19:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 23:19:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:19:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284999634] [2023-02-17 23:19:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284999634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:19:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105104997] [2023-02-17 23:19:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:19:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:19:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:19:48,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:19:48,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 23:19:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:19:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 126 conjunts are in the unsatisfiable core [2023-02-17 23:19:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:19:49,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 23:19:49,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-02-17 23:19:49,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:49,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 23:19:49,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-02-17 23:19:49,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:49,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 81 [2023-02-17 23:19:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 23:19:49,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 23:19:49,814 INFO L350 Elim1Store]: Elim1 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 99 treesize of output 71 [2023-02-17 23:19:49,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:49,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 99 [2023-02-17 23:19:49,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-17 23:19:49,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-02-17 23:19:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:49,939 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-02-17 23:19:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:49,944 INFO L350 Elim1Store]: Elim1 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 105 treesize of output 95 [2023-02-17 23:19:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:49,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:49,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 158 [2023-02-17 23:19:49,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-17 23:19:50,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:50,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:50,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 80 [2023-02-17 23:19:50,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:50,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 154 [2023-02-17 23:19:50,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-02-17 23:19:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2023-02-17 23:19:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:19:50,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-02-17 23:19:50,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-17 23:19:50,212 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:19:50,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:19:50,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 45 case distinctions, treesize of input 533 treesize of output 722 [2023-02-17 23:19:50,372 INFO L350 Elim1Store]: Elim1 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 326 treesize of output 294