./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 22:35:39,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 22:35:39,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 22:35:39,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 22:35:39,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 22:35:39,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 22:35:39,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 22:35:39,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 22:35:39,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 22:35:39,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 22:35:39,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 22:35:39,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 22:35:39,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 22:35:39,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 22:35:39,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 22:35:39,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 22:35:39,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 22:35:39,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 22:35:39,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 22:35:39,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 22:35:39,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 22:35:39,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 22:35:39,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 22:35:39,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 22:35:39,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 22:35:39,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 22:35:39,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 22:35:39,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 22:35:39,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 22:35:39,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 22:35:39,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 22:35:39,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 22:35:39,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 22:35:39,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 22:35:39,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 22:35:39,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 22:35:39,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 22:35:39,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 22:35:39,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 22:35:39,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 22:35:39,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 22:35:39,333 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 22:35:39,352 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 22:35:39,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 22:35:39,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 22:35:39,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 22:35:39,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 22:35:39,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 22:35:39,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 22:35:39,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 22:35:39,353 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 22:35:39,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 22:35:39,354 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 22:35:39,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 22:35:39,355 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 22:35:39,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 22:35:39,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 22:35:39,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 22:35:39,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 22:35:39,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:35:39,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 22:35:39,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 22:35:39,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 22:35:39,358 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 22:35:39,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2023-02-17 22:35:39,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 22:35:39,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 22:35:39,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 22:35:39,577 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 22:35:39,577 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 22:35:39,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2023-02-17 22:35:40,519 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 22:35:40,718 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 22:35:40,718 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2023-02-17 22:35:40,732 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860592ccf/8b550678973f485c94d603db25d00ffc/FLAG247142c2a [2023-02-17 22:35:40,741 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/860592ccf/8b550678973f485c94d603db25d00ffc [2023-02-17 22:35:40,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 22:35:40,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 22:35:40,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 22:35:40,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 22:35:40,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 22:35:40,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:35:40" (1/1) ... [2023-02-17 22:35:40,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516dd2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:40, skipping insertion in model container [2023-02-17 22:35:40,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 10:35:40" (1/1) ... [2023-02-17 22:35:40,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 22:35:40,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 22:35:40,953 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-properties/simple-2.i[23225,23238] [2023-02-17 22:35:40,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:35:40,966 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 22:35:40,999 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-properties/simple-2.i[23225,23238] [2023-02-17 22:35:41,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 22:35:41,066 INFO L208 MainTranslator]: Completed translation [2023-02-17 22:35:41,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41 WrapperNode [2023-02-17 22:35:41,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 22:35:41,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 22:35:41,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 22:35:41,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 22:35:41,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,103 INFO L138 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2023-02-17 22:35:41,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 22:35:41,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 22:35:41,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 22:35:41,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 22:35:41,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,118 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 22:35:41,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 22:35:41,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 22:35:41,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 22:35:41,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (1/1) ... [2023-02-17 22:35:41,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 22:35:41,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:41,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 22:35:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 22:35:41,171 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 22:35:41,171 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 22:35:41,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 22:35:41,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 22:35:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 22:35:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 22:35:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 22:35:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 22:35:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 22:35:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 22:35:41,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 22:35:41,268 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 22:35:41,269 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 22:35:41,327 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 22:35:41,404 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 22:35:41,408 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 22:35:41,408 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 22:35:41,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:35:41 BoogieIcfgContainer [2023-02-17 22:35:41,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 22:35:41,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 22:35:41,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 22:35:41,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 22:35:41,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 10:35:40" (1/3) ... [2023-02-17 22:35:41,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c5fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:35:41, skipping insertion in model container [2023-02-17 22:35:41,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 10:35:41" (2/3) ... [2023-02-17 22:35:41,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c5fbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 10:35:41, skipping insertion in model container [2023-02-17 22:35:41,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 10:35:41" (3/3) ... [2023-02-17 22:35:41,415 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-2.i [2023-02-17 22:35:41,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 22:35:41,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 22:35:41,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 22:35:41,485 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;@ad223fd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 22:35:41,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 22:35:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 22:35:41,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:41,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:41,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2081441033, now seen corresponding path program 1 times [2023-02-17 22:35:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964213685] [2023-02-17 22:35:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:41,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964213685] [2023-02-17 22:35:41,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964213685] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:35:41,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:35:41,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 22:35:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221408547] [2023-02-17 22:35:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:35:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 22:35:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 22:35:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 22:35:41,682 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:41,692 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-02-17 22:35:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 22:35:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 22:35:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:41,697 INFO L225 Difference]: With dead ends: 32 [2023-02-17 22:35:41,697 INFO L226 Difference]: Without dead ends: 14 [2023-02-17 22:35:41,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 22:35:41,701 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:41,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-17 22:35:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-17 22:35:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-17 22:35:41,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-02-17 22:35:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:41,721 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-17 22:35:41,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-17 22:35:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 22:35:41,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:41,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 22:35:41,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash -342474989, now seen corresponding path program 1 times [2023-02-17 22:35:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177146642] [2023-02-17 22:35:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:41,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177146642] [2023-02-17 22:35:41,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177146642] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 22:35:41,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 22:35:41,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 22:35:41,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497426793] [2023-02-17 22:35:41,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 22:35:41,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 22:35:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 22:35:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 22:35:41,873 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:41,912 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-02-17 22:35:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:35:41,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 22:35:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:41,914 INFO L225 Difference]: With dead ends: 29 [2023-02-17 22:35:41,914 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 22:35:41,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 22:35:41,915 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:41,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 22:35:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-17 22:35:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-17 22:35:41,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-02-17 22:35:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:41,920 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-17 22:35:41,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-17 22:35:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 22:35:41,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:41,920 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:41,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 22:35:41,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2120256963, now seen corresponding path program 1 times [2023-02-17 22:35:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:41,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201887037] [2023-02-17 22:35:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:42,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201887037] [2023-02-17 22:35:42,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201887037] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:35:42,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664270559] [2023-02-17 22:35:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:42,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:42,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:35:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 22:35:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:42,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 22:35:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:35:42,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:42,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:42,288 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 38 treesize of output 26 [2023-02-17 22:35:42,292 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 32 treesize of output 20 [2023-02-17 22:35:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:42,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:35:42,316 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 35 treesize of output 29 [2023-02-17 22:35:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:42,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664270559] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:35:42,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:35:42,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 8 [2023-02-17 22:35:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822676984] [2023-02-17 22:35:42,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:35:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 22:35:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 22:35:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-17 22:35:42,335 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:42,393 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-17 22:35:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 22:35:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 22:35:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:42,394 INFO L225 Difference]: With dead ends: 33 [2023-02-17 22:35:42,394 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 22:35:42,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-17 22:35:42,395 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:42,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 22:35:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 22:35:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-02-17 22:35:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-17 22:35:42,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-02-17 22:35:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:42,401 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-17 22:35:42,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-17 22:35:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 22:35:42,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:42,402 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:42,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 22:35:42,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:42,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2147109766, now seen corresponding path program 1 times [2023-02-17 22:35:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326416963] [2023-02-17 22:35:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:42,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:42,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326416963] [2023-02-17 22:35:42,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326416963] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:35:42,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019126101] [2023-02-17 22:35:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:42,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:42,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:35:42,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 22:35:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:42,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 22:35:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:35:42,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 22:35:42,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:42,926 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 11 treesize of output 15 [2023-02-17 22:35:42,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 22:35:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:42,950 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 21 treesize of output 20 [2023-02-17 22:35:42,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 22:35:42,984 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 15 treesize of output 7 [2023-02-17 22:35:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:35:42,992 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_118 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_118) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2023-02-17 22:35:43,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2023-02-17 22:35:43,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2023-02-17 22:35:43,043 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 9 treesize of output 7 [2023-02-17 22:35:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-17 22:35:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019126101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:35:43,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:35:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 22:35:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158108681] [2023-02-17 22:35:43,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:35:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 22:35:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 22:35:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=190, Unknown=3, NotChecked=28, Total=272 [2023-02-17 22:35:43,081 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:43,183 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-02-17 22:35:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 22:35:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 22:35:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:43,185 INFO L225 Difference]: With dead ends: 23 [2023-02-17 22:35:43,185 INFO L226 Difference]: Without dead ends: 21 [2023-02-17 22:35:43,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=284, Unknown=3, NotChecked=36, Total=420 [2023-02-17 22:35:43,186 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:43,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 46 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2023-02-17 22:35:43,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-17 22:35:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-02-17 22:35:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-17 22:35:43,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2023-02-17 22:35:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:43,189 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-17 22:35:43,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-17 22:35:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 22:35:43,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:43,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:43,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 22:35:43,395 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,SelfDestructingSolverStorable3 [2023-02-17 22:35:43,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 405712758, now seen corresponding path program 1 times [2023-02-17 22:35:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737209097] [2023-02-17 22:35:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:43,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:43,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737209097] [2023-02-17 22:35:43,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737209097] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:35:43,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831160801] [2023-02-17 22:35:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:43,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:35:43,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 22:35:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 22:35:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:35:43,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 22:35:43,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,717 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 11 treesize of output 15 [2023-02-17 22:35:43,724 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 [2023-02-17 22:35:43,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:43,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,739 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 53 treesize of output 64 [2023-02-17 22:35:43,742 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 16 treesize of output 18 [2023-02-17 22:35:43,745 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 20 treesize of output 21 [2023-02-17 22:35:43,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-17 22:35:43,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 46 [2023-02-17 22:35:43,766 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-02-17 22:35:43,785 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 15 treesize of output 7 [2023-02-17 22:35:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:43,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 22:35:43,803 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 452 treesize of output 408 [2023-02-17 22:35:43,945 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse0 (forall ((v_ArrVal_178 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) |c_ULTIMATE.start_main_~p~0#1.base|))) (.cse3 (forall ((v_ArrVal_179 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) |c_ULTIMATE.start_main_~p~0#1.offset|))) (.cse2 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) (.cse6 (forall ((v_ArrVal_178 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) |c_ULTIMATE.start_main_~p~0#1.base|))))) (and (or .cse0 (forall ((v_ArrVal_179 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) .cse2))) .cse0 (or .cse0 .cse3) .cse3 (forall ((v_ArrVal_179 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (or (= .cse4 .cse2) (= .cse4 |c_ULTIMATE.start_main_~p~0#1.offset|)))) (or (forall ((v_ArrVal_179 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (or (not (= .cse5 .cse2)) (= .cse5 |c_ULTIMATE.start_main_~p~0#1.offset|)))) .cse6) (or (forall ((v_ArrVal_179 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) .cse2))) .cse6)))) is different from false [2023-02-17 22:35:43,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-02-17 22:35:43,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-02-17 22:35:43,973 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 9 treesize of output 5 [2023-02-17 22:35:43,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 22:35:43,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-02-17 22:35:43,977 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 7 treesize of output 3 [2023-02-17 22:35:43,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 22:35:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:43,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-02-17 22:35:43,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 22:35:43,987 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:43,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-02-17 22:35:43,990 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 22:35:43,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,992 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-17 22:35:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:43,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2023-02-17 22:35:43,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:43,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2023-02-17 22:35:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:44,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:44,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 1 [2023-02-17 22:35:44,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,003 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-02-17 22:35:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:44,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-02-17 22:35:44,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2023-02-17 22:35:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:44,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2023-02-17 22:35:44,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,014 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-17 22:35:44,016 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:44,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2023-02-17 22:35:44,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-02-17 22:35:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 22:35:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 22:35:44,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-17 22:35:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-17 22:35:44,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831160801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 22:35:44,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 22:35:44,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-17 22:35:44,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013179618] [2023-02-17 22:35:44,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 22:35:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 22:35:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 22:35:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 22:35:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=174, Unknown=1, NotChecked=26, Total=240 [2023-02-17 22:35:44,055 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 22:35:44,192 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-02-17 22:35:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 22:35:44,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 22:35:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 22:35:44,193 INFO L225 Difference]: With dead ends: 34 [2023-02-17 22:35:44,193 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 22:35:44,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=334, Unknown=1, NotChecked=38, Total=462 [2023-02-17 22:35:44,193 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 22:35:44,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 61 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2023-02-17 22:35:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 22:35:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-17 22:35:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-17 22:35:44,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2023-02-17 22:35:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 22:35:44,198 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-17 22:35:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 22:35:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-02-17 22:35:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 22:35:44,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 22:35:44,198 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 22:35:44,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 22:35:44,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:44,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 22:35:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 22:35:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash 555614970, now seen corresponding path program 2 times [2023-02-17 22:35:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 22:35:44,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626572469] [2023-02-17 22:35:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 22:35:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 22:35:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 22:35:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 22:35:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 22:35:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626572469] [2023-02-17 22:35:44,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626572469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 22:35:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982349947] [2023-02-17 22:35:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 22:35:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 22:35:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 22:35:44,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 22:35:44,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 22:35:44,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 22:35:44,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 22:35:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 22:35:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 22:35:44,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 22:35:44,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,742 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 11 treesize of output 15 [2023-02-17 22:35:44,748 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 [2023-02-17 22:35:44,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 22:35:44,763 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 22:35:44,766 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 22:35:44,769 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 34 treesize of output 36 [2023-02-17 22:35:44,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 22:35:44,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 242 [2023-02-17 22:35:44,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 22:35:44,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 19 case distinctions, treesize of input 92 treesize of output 164