./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 574ddb4e 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-?-574ddb4 [2023-02-18 14:34:41,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 14:34:41,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 14:34:41,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 14:34:41,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 14:34:41,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 14:34:41,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 14:34:41,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 14:34:41,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 14:34:41,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 14:34:41,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 14:34:41,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 14:34:41,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 14:34:41,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 14:34:41,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 14:34:41,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 14:34:41,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 14:34:41,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 14:34:41,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 14:34:41,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 14:34:41,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 14:34:41,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 14:34:41,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 14:34:41,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 14:34:41,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 14:34:41,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 14:34:41,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 14:34:41,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 14:34:41,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 14:34:41,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 14:34:41,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 14:34:41,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 14:34:41,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 14:34:41,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 14:34:41,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 14:34:41,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 14:34:41,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 14:34:41,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 14:34:41,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 14:34:41,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 14:34:41,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 14:34:41,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 14:34:41,268 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 14:34:41,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 14:34:41,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 14:34:41,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 14:34:41,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 14:34:41,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 14:34:41,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 14:34:41,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 14:34:41,273 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 14:34:41,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 14:34:41,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 14:34:41,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 14:34:41,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 14:34:41,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 14:34:41,275 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 14:34:41,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 14:34:41,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 14:34:41,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 14:34:41,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 14:34:41,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 14:34:41,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 14:34:41,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 14:34:41,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 14:34:41,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 14:34:41,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 14:34:41,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 14:34:41,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 14:34:41,278 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 14:34:41,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 14:34:41,278 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 14:34:41,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2023-02-18 14:34:41,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 14:34:41,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 14:34:41,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 14:34:41,563 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 14:34:41,564 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 14:34:41,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-18 14:34:42,616 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 14:34:42,860 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 14:34:42,860 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2023-02-18 14:34:42,869 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1489e085c/5e4dcafced484f5eb45d99afabcee5a5/FLAG572cbfd29 [2023-02-18 14:34:42,880 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1489e085c/5e4dcafced484f5eb45d99afabcee5a5 [2023-02-18 14:34:42,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 14:34:42,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 14:34:42,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 14:34:42,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 14:34:42,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 14:34:42,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:34:42" (1/1) ... [2023-02-18 14:34:42,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d802bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:42, skipping insertion in model container [2023-02-18 14:34:42,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:34:42" (1/1) ... [2023-02-18 14:34:42,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 14:34:42,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 14:34:43,189 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2023-02-18 14:34:43,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 14:34:43,204 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 14:34:43,245 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] [2023-02-18 14:34:43,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 14:34:43,267 INFO L208 MainTranslator]: Completed translation [2023-02-18 14:34:43,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43 WrapperNode [2023-02-18 14:34:43,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 14:34:43,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 14:34:43,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 14:34:43,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 14:34:43,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,302 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2023-02-18 14:34:43,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 14:34:43,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 14:34:43,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 14:34:43,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 14:34:43,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,325 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 14:34:43,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 14:34:43,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 14:34:43,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 14:34:43,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (1/1) ... [2023-02-18 14:34:43,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 14:34:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:43,355 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) [2023-02-18 14:34:43,362 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 [2023-02-18 14:34:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 14:34:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 14:34:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-18 14:34:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-18 14:34:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 14:34:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 14:34:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 14:34:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 14:34:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 14:34:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 14:34:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 14:34:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 14:34:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 14:34:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 14:34:43,519 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 14:34:43,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 14:34:43,803 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 14:34:43,808 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 14:34:43,808 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 14:34:43,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:34:43 BoogieIcfgContainer [2023-02-18 14:34:43,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 14:34:43,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 14:34:43,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 14:34:43,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 14:34:43,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:34:42" (1/3) ... [2023-02-18 14:34:43,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f3d2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:34:43, skipping insertion in model container [2023-02-18 14:34:43,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:34:43" (2/3) ... [2023-02-18 14:34:43,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f3d2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:34:43, skipping insertion in model container [2023-02-18 14:34:43,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:34:43" (3/3) ... [2023-02-18 14:34:43,817 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2023-02-18 14:34:43,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 14:34:43,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 14:34:43,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 14:34:43,887 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;@4e1a6291, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 14:34:43,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 14:34:43,892 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) [2023-02-18 14:34:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 14:34:43,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:43,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:34:43,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 308507763, now seen corresponding path program 1 times [2023-02-18 14:34:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042793738] [2023-02-18 14:34:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 14:34:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:34:44,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042793738] [2023-02-18 14:34:44,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042793738] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:34:44,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:34:44,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 14:34:44,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143184899] [2023-02-18 14:34:44,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:34:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 14:34:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:44,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 14:34:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 14:34:44,251 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) [2023-02-18 14:34:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:44,333 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2023-02-18 14:34:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 14:34:44,335 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 [2023-02-18 14:34:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:44,343 INFO L225 Difference]: With dead ends: 57 [2023-02-18 14:34:44,343 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 14:34:44,346 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 [2023-02-18 14:34:44,350 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 14:34:44,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 14:34:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 14:34:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-18 14:34:44,388 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) [2023-02-18 14:34:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-18 14:34:44,391 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2023-02-18 14:34:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-18 14:34:44,393 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) [2023-02-18 14:34:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-18 14:34:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 14:34:44,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:44,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:34:44,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 14:34:44,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2109805219, now seen corresponding path program 1 times [2023-02-18 14:34:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:44,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362497037] [2023-02-18 14:34:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 14:34:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:34:44,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:44,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362497037] [2023-02-18 14:34:44,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362497037] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:34:44,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:34:44,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 14:34:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202840903] [2023-02-18 14:34:44,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:34:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 14:34:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 14:34:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:34:44,596 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) [2023-02-18 14:34:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:44,635 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-02-18 14:34:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 14:34:44,636 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 [2023-02-18 14:34:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:44,637 INFO L225 Difference]: With dead ends: 50 [2023-02-18 14:34:44,637 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 14:34:44,637 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 [2023-02-18 14:34:44,639 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 [2023-02-18 14:34:44,639 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] [2023-02-18 14:34:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 14:34:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-02-18 14:34:44,644 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) [2023-02-18 14:34:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-18 14:34:44,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2023-02-18 14:34:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:44,646 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-18 14:34:44,646 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) [2023-02-18 14:34:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-18 14:34:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 14:34:44,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:44,647 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] [2023-02-18 14:34:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 14:34:44,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash 493100305, now seen corresponding path program 1 times [2023-02-18 14:34:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702840677] [2023-02-18 14:34:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:44,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 14:34:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:34:44,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702840677] [2023-02-18 14:34:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702840677] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:34:44,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:34:44,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 14:34:44,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50944608] [2023-02-18 14:34:44,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:34:44,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 14:34:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 14:34:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 14:34:44,791 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) [2023-02-18 14:34:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:44,839 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-02-18 14:34:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 14:34:44,839 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 [2023-02-18 14:34:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:44,840 INFO L225 Difference]: With dead ends: 55 [2023-02-18 14:34:44,840 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 14:34:44,841 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 [2023-02-18 14:34:44,842 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 [2023-02-18 14:34:44,842 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] [2023-02-18 14:34:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 14:34:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-02-18 14:34:44,847 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) [2023-02-18 14:34:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-18 14:34:44,848 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2023-02-18 14:34:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:44,848 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-18 14:34:44,848 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) [2023-02-18 14:34:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-18 14:34:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 14:34:44,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:44,850 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] [2023-02-18 14:34:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 14:34:44,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1095247597, now seen corresponding path program 1 times [2023-02-18 14:34:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814686529] [2023-02-18 14:34:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 14:34:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:34:44,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:44,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814686529] [2023-02-18 14:34:44,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814686529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:44,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667919104] [2023-02-18 14:34:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:44,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:44,965 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) [2023-02-18 14:34:44,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 14:34:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 14:34:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:34:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:34:45,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 14:34:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:34:45,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667919104] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 14:34:45,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 14:34:45,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-18 14:34:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343498774] [2023-02-18 14:34:45,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 14:34:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 14:34:45,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 14:34:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 14:34:45,217 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) [2023-02-18 14:34:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:45,283 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-02-18 14:34:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 14:34:45,283 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 [2023-02-18 14:34:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:45,286 INFO L225 Difference]: With dead ends: 51 [2023-02-18 14:34:45,286 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 14:34:45,287 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 [2023-02-18 14:34:45,294 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 [2023-02-18 14:34:45,295 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] [2023-02-18 14:34:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 14:34:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 14:34:45,305 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) [2023-02-18 14:34:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-02-18 14:34:45,306 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2023-02-18 14:34:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:45,307 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-02-18 14:34:45,307 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) [2023-02-18 14:34:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-02-18 14:34:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 14:34:45,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:45,309 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] [2023-02-18 14:34:45,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 14:34:45,516 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 [2023-02-18 14:34:45,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash -292922041, now seen corresponding path program 1 times [2023-02-18 14:34:45,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:45,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512604293] [2023-02-18 14:34:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:45,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 14:34:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 14:34:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 14:34:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:45,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512604293] [2023-02-18 14:34:45,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512604293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 14:34:45,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 14:34:45,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 14:34:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461622264] [2023-02-18 14:34:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 14:34:45,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 14:34:45,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 14:34:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 14:34:45,848 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) [2023-02-18 14:34:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:45,939 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-02-18 14:34:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 14:34:45,940 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 [2023-02-18 14:34:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:45,941 INFO L225 Difference]: With dead ends: 45 [2023-02-18 14:34:45,941 INFO L226 Difference]: Without dead ends: 42 [2023-02-18 14:34:45,944 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 [2023-02-18 14:34:45,945 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 [2023-02-18 14:34:45,945 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] [2023-02-18 14:34:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-18 14:34:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-02-18 14:34:45,954 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) [2023-02-18 14:34:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-02-18 14:34:45,955 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2023-02-18 14:34:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:45,956 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-02-18 14:34:45,956 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) [2023-02-18 14:34:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-02-18 14:34:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 14:34:45,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:45,957 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] [2023-02-18 14:34:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 14:34:45,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -292920367, now seen corresponding path program 1 times [2023-02-18 14:34:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555713934] [2023-02-18 14:34:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:45,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:46,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 14:34:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 14:34:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:34:46,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555713934] [2023-02-18 14:34:46,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555713934] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150603226] [2023-02-18 14:34:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:46,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:46,420 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) [2023-02-18 14:34:46,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 14:34:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 14:34:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:34:46,753 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 21 treesize of output 13 [2023-02-18 14:34:46,789 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= |node_create_~temp~0#1.base| (+ |c_#StackHeapBarrier| (- 1))) (exists ((v_ArrVal_652 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_652))))) is different from true [2023-02-18 14:34:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:46,806 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 28 treesize of output 28 [2023-02-18 14:34:46,827 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 29 treesize of output 17 [2023-02-18 14:34:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-02-18 14:34:46,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 14:34:46,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150603226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:46,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 14:34:46,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2023-02-18 14:34:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579315643] [2023-02-18 14:34:46,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 14:34:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 14:34:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 14:34:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=565, Unknown=6, NotChecked=48, Total=702 [2023-02-18 14:34:46,927 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) [2023-02-18 14:34:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:47,247 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-02-18 14:34:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 14:34:47,248 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 [2023-02-18 14:34:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:47,249 INFO L225 Difference]: With dead ends: 58 [2023-02-18 14:34:47,249 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 14:34:47,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=891, Unknown=6, NotChecked=62, Total=1122 [2023-02-18 14:34:47,250 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-18 14:34:47,250 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] [2023-02-18 14:34:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 14:34:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 14:34:47,255 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) [2023-02-18 14:34:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-02-18 14:34:47,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 37 [2023-02-18 14:34:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:47,256 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-02-18 14:34:47,256 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) [2023-02-18 14:34:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-02-18 14:34:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 14:34:47,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:47,257 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] [2023-02-18 14:34:47,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 14:34:47,467 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 [2023-02-18 14:34:47,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1499731437, now seen corresponding path program 1 times [2023-02-18 14:34:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018785486] [2023-02-18 14:34:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 14:34:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 14:34:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 14:34:48,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:48,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018785486] [2023-02-18 14:34:48,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018785486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:48,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408624623] [2023-02-18 14:34:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:48,143 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) [2023-02-18 14:34:48,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 14:34:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 14:34:48,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:34:48,475 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 [2023-02-18 14:34:48,520 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_892 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_892)))) is different from true [2023-02-18 14:34:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:48,532 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 [2023-02-18 14:34:48,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:48,647 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 [2023-02-18 14:34:48,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:48,656 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 [2023-02-18 14:34:48,673 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:49,066 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 [2023-02-18 14:34:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:49,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2023-02-18 14:34:49,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:49,106 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 50 treesize of output 38 [2023-02-18 14:34:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:49,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2023-02-18 14:34:49,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:49,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-02-18 14:34:49,465 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 [2023-02-18 14:34:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-02-18 14:34:49,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 14:34:49,644 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_13| Int) (|ULTIMATE.start_dll_append_~last~0#1.offset| Int) (|ULTIMATE.start_dll_append_~last~0#1.base| Int) (v_ArrVal_896 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_13| v_ArrVal_899))) (let ((.cse0 (select .cse2 |ULTIMATE.start_dll_append_~last~0#1.base|)) (.cse1 (+ 4 |ULTIMATE.start_dll_append_~last~0#1.offset|))) (or (not (= (select .cse0 .cse1) 0)) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_13| |c_#StackHeapBarrier|)) (not (= 0 (select (select (store (store .cse2 |ULTIMATE.start_dll_append_~last~0#1.base| (store .cse0 .cse1 |v_ULTIMATE.start_dll_append_#t~ret7#1.base_13|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_13| v_ArrVal_896) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2023-02-18 14:34:49,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408624623] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:49,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 14:34:49,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2023-02-18 14:34:49,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328443456] [2023-02-18 14:34:49,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 14:34:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 14:34:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 14:34:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1091, Unknown=3, NotChecked=134, Total=1332 [2023-02-18 14:34:49,648 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 32 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 26 states have internal predecessors, (53), 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) [2023-02-18 14:34:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:50,504 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-18 14:34:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 14:34:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 26 states have internal predecessors, (53), 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 [2023-02-18 14:34:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:50,508 INFO L225 Difference]: With dead ends: 52 [2023-02-18 14:34:50,508 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 14:34:50,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=393, Invalid=2368, Unknown=3, NotChecked=206, Total=2970 [2023-02-18 14:34:50,511 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 322 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 14:34:50,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 180 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 475 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2023-02-18 14:34:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 14:34:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2023-02-18 14:34:50,519 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) [2023-02-18 14:34:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-02-18 14:34:50,520 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 40 [2023-02-18 14:34:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:50,520 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-02-18 14:34:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 26 states have internal predecessors, (53), 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) [2023-02-18 14:34:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-02-18 14:34:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 14:34:50,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:50,525 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] [2023-02-18 14:34:50,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 14:34:50,732 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 [2023-02-18 14:34:50,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:50,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1499729763, now seen corresponding path program 1 times [2023-02-18 14:34:50,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:50,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381685096] [2023-02-18 14:34:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:50,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 14:34:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:51,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 14:34:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 14:34:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:52,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381685096] [2023-02-18 14:34:52,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381685096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:52,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044389529] [2023-02-18 14:34:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:52,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:52,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:52,145 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) [2023-02-18 14:34:52,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 14:34:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 117 conjunts are in the unsatisfiable core [2023-02-18 14:34:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:34:52,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-02-18 14:34:52,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:52,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2023-02-18 14:34:52,873 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 13 treesize of output 9 [2023-02-18 14:34:52,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:52,878 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 [2023-02-18 14:34:52,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:52,924 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 93 [2023-02-18 14:34:52,930 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 [2023-02-18 14:34:52,936 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 79 treesize of output 43 [2023-02-18 14:34:53,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:53,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 130 [2023-02-18 14:34:53,176 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 9 treesize of output 3 [2023-02-18 14:34:53,182 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 7 treesize of output 3 [2023-02-18 14:34:53,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2023-02-18 14:34:53,194 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 33 treesize of output 25 [2023-02-18 14:34:53,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:53,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:53,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 178 [2023-02-18 14:34:53,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:53,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 62 [2023-02-18 14:34:53,368 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,386 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,397 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,402 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,413 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,418 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:53,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 18 treesize of output 20 [2023-02-18 14:34:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:53,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 14 treesize of output 16 [2023-02-18 14:34:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 14:34:54,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 14:34:54,449 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1151 Int) (v_ArrVal_1155 (Array Int Int)) (v_ArrVal_1154 (Array Int Int)) (v_ArrVal_1153 (Array Int Int)) (v_ArrVal_1152 (Array Int Int)) (v_ArrVal_1150 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1150) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1152) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1155) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1153) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_append_~last~0#1.offset|) v_ArrVal_1151)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2023-02-18 14:34:54,809 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| Int) (v_ArrVal_1151 Int) (v_ArrVal_1167 (Array Int Int)) (v_ArrVal_1166 (Array Int Int)) (v_ArrVal_1155 (Array Int Int)) (v_ArrVal_1165 (Array Int Int)) (v_ArrVal_1154 (Array Int Int)) (v_ArrVal_1153 (Array Int Int)) (v_ArrVal_1152 (Array Int Int)) (v_ArrVal_1150 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1165)) (.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1166))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse3 (+ 4 (select (select .cse2 |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16|))) (= (select (select (store (store (store |c_#memory_int| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1167) .cse0 v_ArrVal_1150) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1152) (select (select (store (store .cse1 .cse0 v_ArrVal_1155) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1153) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store (store .cse2 .cse0 (store (select .cse2 .cse0) .cse3 v_ArrVal_1151)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| v_ArrVal_1154) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (= 0 (select (select .cse1 .cse0) .cse3))) (not (< |v_ULTIMATE.start_dll_append_#t~ret7#1.base_16| |c_#StackHeapBarrier|)))))) is different from false [2023-02-18 14:34:54,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044389529] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:54,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 14:34:54,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2023-02-18 14:34:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674961050] [2023-02-18 14:34:54,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 14:34:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 14:34:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 14:34:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 14:34:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2298, Unknown=5, NotChecked=194, Total=2652 [2023-02-18 14:34:54,815 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 46 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 37 states have internal predecessors, (65), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 14:34:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 14:34:56,474 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-02-18 14:34:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 14:34:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 37 states have internal predecessors, (65), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-02-18 14:34:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 14:34:56,475 INFO L225 Difference]: With dead ends: 47 [2023-02-18 14:34:56,475 INFO L226 Difference]: Without dead ends: 39 [2023-02-18 14:34:56,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=406, Invalid=3629, Unknown=5, NotChecked=250, Total=4290 [2023-02-18 14:34:56,477 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 14:34:56,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 301 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 14:34:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-18 14:34:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-02-18 14:34:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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) [2023-02-18 14:34:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-02-18 14:34:56,487 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 40 [2023-02-18 14:34:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 14:34:56,487 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-02-18 14:34:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 37 states have internal predecessors, (65), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 14:34:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-02-18 14:34:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 14:34:56,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 14:34:56,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 14:34:56,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 14:34:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:56,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 14:34:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 14:34:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1422189688, now seen corresponding path program 1 times [2023-02-18 14:34:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 14:34:56,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477257573] [2023-02-18 14:34:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:56,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 14:34:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 14:34:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 14:34:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:58,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-18 14:34:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 14:34:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 14:34:58,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477257573] [2023-02-18 14:34:58,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477257573] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 14:34:58,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628677949] [2023-02-18 14:34:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 14:34:58,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 14:34:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 14:34:58,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 14:34:58,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 14:34:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 14:34:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 133 conjunts are in the unsatisfiable core [2023-02-18 14:34:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 14:34:58,921 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 [2023-02-18 14:34:59,097 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 [2023-02-18 14:34:59,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:59,204 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 [2023-02-18 14:34:59,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-18 14:34:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:59,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-02-18 14:34:59,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:59,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 92 [2023-02-18 14:34:59,323 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 18 treesize of output 20 [2023-02-18 14:34:59,327 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 78 treesize of output 42 [2023-02-18 14:34:59,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:59,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 123 [2023-02-18 14:34:59,559 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 47 treesize of output 31 [2023-02-18 14:34:59,566 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 9 treesize of output 3 [2023-02-18 14:34:59,571 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 7 treesize of output 3 [2023-02-18 14:34:59,581 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 27 treesize of output 21 [2023-02-18 14:34:59,584 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:59,586 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:59,589 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 71 treesize of output 35 [2023-02-18 14:34:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:59,750 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 [2023-02-18 14:34:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:34:59,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:59,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 175 [2023-02-18 14:34:59,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:34:59,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 62 [2023-02-18 14:34:59,791 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:59,796 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:59,805 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 14:34:59,812 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 18 treesize of output 20 [2023-02-18 14:35:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:35:00,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 43 case distinctions, treesize of input 737 treesize of output 946 [2023-02-18 14:35:00,554 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 14:35:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:35:00,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 31 case distinctions, treesize of input 401 treesize of output 745 [2023-02-18 14:35:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 14:35:00,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 602 treesize of output 577 [2023-02-18 14:35:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 14:35:00,683 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 29