./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/forester-heap/dll-simple-white-blue-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 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 23:27:20,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:27:20,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:27:20,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:27:20,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:27:20,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:27:20,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:27:20,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:27:20,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:27:20,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:27:20,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:27:20,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:27:20,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:27:20,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:27:20,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:27:20,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:27:20,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:27:20,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:27:20,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:27:20,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:27:20,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:27:20,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:27:20,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:27:20,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:27:20,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:27:20,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:27:20,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:27:20,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:27:20,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:27:20,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:27:20,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:27:20,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:27:20,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:27:20,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:27:20,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:27:20,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:27:20,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:27:20,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:27:20,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:27:20,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:27:20,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:27:20,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:27:20,683 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:27:20,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:27:20,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:27:20,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:27:20,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:27:20,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:27:20,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:27:20,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:27:20,686 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:27:20,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:27:20,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:27:20,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:27:20,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:27:20,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:27:20,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:27:20,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:27:20,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:27:20,690 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:27:20,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e [2023-02-13 23:27:20,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:27:20,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:27:20,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:27:20,907 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:27:20,908 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:27:20,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-02-13 23:27:21,818 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:27:22,073 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:27:22,073 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2023-02-13 23:27:22,080 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4dfc8e3d/1c2d58d99a9f4dcd9177f84e9aa45f34/FLAG4da906523 [2023-02-13 23:27:22,092 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4dfc8e3d/1c2d58d99a9f4dcd9177f84e9aa45f34 [2023-02-13 23:27:22,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:27:22,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:27:22,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:27:22,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:27:22,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:27:22,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d01afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22, skipping insertion in model container [2023-02-13 23:27:22,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:27:22,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:27:22,320 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-02-13 23:27:22,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:27:22,334 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:27:22,373 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/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2023-02-13 23:27:22,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:27:22,392 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:27:22,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22 WrapperNode [2023-02-13 23:27:22,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:27:22,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:27:22,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:27:22,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:27:22,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,422 INFO L138 Inliner]: procedures = 119, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 118 [2023-02-13 23:27:22,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:27:22,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:27:22,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:27:22,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:27:22,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,439 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:27:22,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:27:22,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:27:22,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:27:22,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (1/1) ... [2023-02-13 23:27:22,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:27:22,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:27:22,482 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) [2023-02-13 23:27:22,505 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 [2023-02-13 23:27:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 23:27:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 23:27:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:27:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:27:22,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:27:22,632 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:27:22,646 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:27:22,841 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:27:22,845 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:27:22,845 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-13 23:27:22,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:27:22 BoogieIcfgContainer [2023-02-13 23:27:22,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:27:22,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:27:22,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:27:22,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:27:22,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:27:22" (1/3) ... [2023-02-13 23:27:22,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fadf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:27:22, skipping insertion in model container [2023-02-13 23:27:22,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:27:22" (2/3) ... [2023-02-13 23:27:22,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44fadf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:27:22, skipping insertion in model container [2023-02-13 23:27:22,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:27:22" (3/3) ... [2023-02-13 23:27:22,852 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2023-02-13 23:27:22,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:27:22,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:27:22,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:27:22,902 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;@f13a23e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:27:22,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:27:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.72) internal successors, (43), 26 states have internal predecessors, (43), 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) [2023-02-13 23:27:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-13 23:27:22,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:22,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:22,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -893663255, now seen corresponding path program 1 times [2023-02-13 23:27:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:22,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745648636] [2023-02-13 23:27:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:23,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:23,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745648636] [2023-02-13 23:27:23,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745648636] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:27:23,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:27:23,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 23:27:23,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611782260] [2023-02-13 23:27:23,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 23:27:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 23:27:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 23:27:23,188 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.72) internal successors, (43), 26 states have internal predecessors, (43), 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-02-13 23:27:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:23,201 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2023-02-13 23:27:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 23:27:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-02-13 23:27:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:23,207 INFO L225 Difference]: With dead ends: 49 [2023-02-13 23:27:23,207 INFO L226 Difference]: Without dead ends: 20 [2023-02-13 23:27:23,209 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 [2023-02-13 23:27:23,211 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2023-02-13 23:27:23,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:27:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-13 23:27:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-13 23:27:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2023-02-13 23:27:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-02-13 23:27:23,231 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2023-02-13 23:27:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:23,231 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-02-13 23:27:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-02-13 23:27:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-02-13 23:27:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-13 23:27:23,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:23,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:27:23,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1702731784, now seen corresponding path program 1 times [2023-02-13 23:27:23,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138052187] [2023-02-13 23:27:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138052187] [2023-02-13 23:27:23,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138052187] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:27:23,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:27:23,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-13 23:27:23,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258826938] [2023-02-13 23:27:23,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:23,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:27:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:27:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:27:23,661 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-02-13 23:27:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:23,835 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-02-13 23:27:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:27:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2023-02-13 23:27:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:23,838 INFO L225 Difference]: With dead ends: 52 [2023-02-13 23:27:23,838 INFO L226 Difference]: Without dead ends: 50 [2023-02-13 23:27:23,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:27:23,842 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:23,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:27:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-13 23:27:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 30. [2023-02-13 23:27:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 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) [2023-02-13 23:27:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-02-13 23:27:23,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 13 [2023-02-13 23:27:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:23,854 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-02-13 23:27:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-02-13 23:27:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-02-13 23:27:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-13 23:27:23,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:23,855 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:23,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 23:27:23,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:23,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1560423741, now seen corresponding path program 1 times [2023-02-13 23:27:23,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087525989] [2023-02-13 23:27:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087525989] [2023-02-13 23:27:24,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087525989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:27:24,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575663828] [2023-02-13 23:27:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:24,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:27:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:27:24,186 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) [2023-02-13 23:27:24,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:27:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-13 23:27:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:27:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:24,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-02-13 23:27:24,382 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 [2023-02-13 23:27:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:24,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 23:27:24,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575663828] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:27:24,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 23:27:24,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-02-13 23:27:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103973339] [2023-02-13 23:27:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:27:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:27:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:27:24,399 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2023-02-13 23:27:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:24,472 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-02-13 23:27:24,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 23:27:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) Word has length 15 [2023-02-13 23:27:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:24,474 INFO L225 Difference]: With dead ends: 47 [2023-02-13 23:27:24,474 INFO L226 Difference]: Without dead ends: 39 [2023-02-13 23:27:24,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-13 23:27:24,478 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:24,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:27:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-13 23:27:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-02-13 23:27:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2023-02-13 23:27:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-13 23:27:24,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 15 [2023-02-13 23:27:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:24,487 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-13 23:27:24,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2023-02-13 23:27:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-13 23:27:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-13 23:27:24,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:24,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:24,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 23:27:24,693 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 [2023-02-13 23:27:24,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 813148851, now seen corresponding path program 1 times [2023-02-13 23:27:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724231602] [2023-02-13 23:27:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724231602] [2023-02-13 23:27:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724231602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:27:25,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191531126] [2023-02-13 23:27:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:25,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:27:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:27:25,231 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) [2023-02-13 23:27:25,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:27:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-13 23:27:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:27:25,350 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 [2023-02-13 23:27:25,354 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 [2023-02-13 23:27:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:25,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2023-02-13 23:27:25,408 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 0 case distinctions, treesize of input 24 treesize of output 24 [2023-02-13 23:27:25,413 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 63 treesize of output 39 [2023-02-13 23:27:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:25,429 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-02-13 23:27:25,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 74 [2023-02-13 23:27:25,435 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 43 treesize of output 35 [2023-02-13 23:27:25,450 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-13 23:27:25,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-13 23:27:25,467 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-13 23:27:25,467 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 2 case distinctions, treesize of input 26 treesize of output 5 [2023-02-13 23:27:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:25,506 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 16 treesize of output 17 [2023-02-13 23:27:25,515 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-02-13 23:27:25,515 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-02-13 23:27:25,526 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-13 23:27:25,526 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 15 treesize of output 15 [2023-02-13 23:27:25,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:25,531 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 16 treesize of output 17 [2023-02-13 23:27:25,579 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 27 treesize of output 15 [2023-02-13 23:27:25,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-13 23:27:25,602 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 [2023-02-13 23:27:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:25,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:27:25,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:25,689 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 42 treesize of output 43 [2023-02-13 23:27:25,692 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 103 treesize of output 79 [2023-02-13 23:27:25,696 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 63 treesize of output 61 [2023-02-13 23:27:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:25,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191531126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:27:25,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:27:25,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-02-13 23:27:25,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196898741] [2023-02-13 23:27:25,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:27:25,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 23:27:25,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 23:27:25,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-13 23:27:25,856 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-02-13 23:27:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:26,256 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2023-02-13 23:27:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 23:27:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 15 [2023-02-13 23:27:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:26,257 INFO L225 Difference]: With dead ends: 70 [2023-02-13 23:27:26,257 INFO L226 Difference]: Without dead ends: 68 [2023-02-13 23:27:26,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2023-02-13 23:27:26,258 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:26,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 167 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 23:27:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-13 23:27:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2023-02-13 23:27:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 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) [2023-02-13 23:27:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2023-02-13 23:27:26,265 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 15 [2023-02-13 23:27:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:26,265 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2023-02-13 23:27:26,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-02-13 23:27:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2023-02-13 23:27:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:27:26,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:26,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:26,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 23:27:26,473 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 [2023-02-13 23:27:26,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1794219288, now seen corresponding path program 1 times [2023-02-13 23:27:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104456057] [2023-02-13 23:27:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104456057] [2023-02-13 23:27:26,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104456057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:27:26,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409736984] [2023-02-13 23:27:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:26,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:27:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:27:26,682 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) [2023-02-13 23:27:26,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:27:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-13 23:27:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:27:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-02-13 23:27:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-02-13 23:27:26,772 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 [2023-02-13 23:27:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2023-02-13 23:27:26,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2023-02-13 23:27:26,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:26,815 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 [2023-02-13 23:27:26,821 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-13 23:27:26,821 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 15 treesize of output 15 [2023-02-13 23:27:26,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-13 23:27:26,990 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-13 23:27:26,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 42 [2023-02-13 23:27:26,998 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-13 23:27:26,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2023-02-13 23:27:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:27,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:27:27,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:27,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2023-02-13 23:27:27,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:27,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2023-02-13 23:27:27,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 23:27:27,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 23:27:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409736984] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-13 23:27:27,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-13 23:27:27,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 16 [2023-02-13 23:27:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371595029] [2023-02-13 23:27:27,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 23:27:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 23:27:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-13 23:27:27,331 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-02-13 23:27:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:29,132 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2023-02-13 23:27:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 23:27:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2023-02-13 23:27:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:29,133 INFO L225 Difference]: With dead ends: 65 [2023-02-13 23:27:29,133 INFO L226 Difference]: Without dead ends: 52 [2023-02-13 23:27:29,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-02-13 23:27:29,134 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:29,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 2 Unknown, 0 Unchecked, 1.5s Time] [2023-02-13 23:27:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-13 23:27:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2023-02-13 23:27:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2023-02-13 23:27:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-13 23:27:29,141 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 16 [2023-02-13 23:27:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:29,141 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-13 23:27:29,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-02-13 23:27:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-13 23:27:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 23:27:29,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:29,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:29,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 23:27:29,347 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 [2023-02-13 23:27:29,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash -732499728, now seen corresponding path program 1 times [2023-02-13 23:27:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664751759] [2023-02-13 23:27:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:29,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664751759] [2023-02-13 23:27:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664751759] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:27:29,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:27:29,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:27:29,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023526257] [2023-02-13 23:27:29,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:27:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:27:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:27:29,417 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2023-02-13 23:27:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:29,488 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2023-02-13 23:27:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:27:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) Word has length 17 [2023-02-13 23:27:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:29,489 INFO L225 Difference]: With dead ends: 65 [2023-02-13 23:27:29,489 INFO L226 Difference]: Without dead ends: 56 [2023-02-13 23:27:29,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:27:29,490 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:29,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 65 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:27:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-13 23:27:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2023-02-13 23:27:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 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) [2023-02-13 23:27:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-02-13 23:27:29,495 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2023-02-13 23:27:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:29,495 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-02-13 23:27:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2023-02-13 23:27:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-02-13 23:27:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 23:27:29,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:29,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:29,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 23:27:29,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1541846354, now seen corresponding path program 1 times [2023-02-13 23:27:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446003113] [2023-02-13 23:27:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446003113] [2023-02-13 23:27:29,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446003113] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:27:29,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:27:29,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-13 23:27:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58556309] [2023-02-13 23:27:29,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:27:29,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 23:27:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:27:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 23:27:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:27:29,616 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2023-02-13 23:27:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:27:29,740 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-13 23:27:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:27:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) Word has length 17 [2023-02-13 23:27:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:27:29,741 INFO L225 Difference]: With dead ends: 88 [2023-02-13 23:27:29,741 INFO L226 Difference]: Without dead ends: 67 [2023-02-13 23:27:29,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:27:29,742 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:27:29,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:27:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-13 23:27:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2023-02-13 23:27:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 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) [2023-02-13 23:27:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-02-13 23:27:29,747 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 17 [2023-02-13 23:27:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:27:29,747 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-02-13 23:27:29,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2023-02-13 23:27:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-02-13 23:27:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-13 23:27:29,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:27:29,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:27:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-13 23:27:29,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:27:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:27:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash 919934077, now seen corresponding path program 1 times [2023-02-13 23:27:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:27:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798898884] [2023-02-13 23:27:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:27:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:27:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798898884] [2023-02-13 23:27:30,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798898884] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:27:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284129993] [2023-02-13 23:27:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:27:30,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:27:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:27:30,443 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) [2023-02-13 23:27:30,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:27:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:27:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-13 23:27:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:27:30,567 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 [2023-02-13 23:27:30,585 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 0 case distinctions, treesize of input 141 treesize of output 108 [2023-02-13 23:27:30,616 INFO L321 Elim1Store]: treesize reduction 67, result has 20.2 percent of original size [2023-02-13 23:27:30,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 272 [2023-02-13 23:27:30,621 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 0 case distinctions, treesize of input 198 treesize of output 157 [2023-02-13 23:27:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,642 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-02-13 23:27:30,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 178 [2023-02-13 23:27:30,647 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 219 treesize of output 199 [2023-02-13 23:27:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 102 [2023-02-13 23:27:30,675 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2023-02-13 23:27:30,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2023-02-13 23:27:30,691 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-02-13 23:27:30,691 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 2 case distinctions, treesize of input 46 treesize of output 9 [2023-02-13 23:27:30,722 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-02-13 23:27:30,722 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 2 case distinctions, treesize of input 46 treesize of output 9 [2023-02-13 23:27:30,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2023-02-13 23:27:30,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,855 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 107 treesize of output 99 [2023-02-13 23:27:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,861 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 79 treesize of output 73 [2023-02-13 23:27:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,868 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 77 treesize of output 71 [2023-02-13 23:27:30,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,879 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-02-13 23:27:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-02-13 23:27:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-02-13 23:27:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-13 23:27:30,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 35 [2023-02-13 23:27:31,144 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 23:27:31,146 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-13 23:27:31,146 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 117 treesize of output 64 [2023-02-13 23:27:31,151 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-13 23:27:31,151 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2023-02-13 23:27:31,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-13 23:27:31,197 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-13 23:27:31,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 22 [2023-02-13 23:27:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:27:31,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:27:31,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2023-02-13 23:27:31,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2023-02-13 23:27:31,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,548 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 244 treesize of output 196 [2023-02-13 23:27:31,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,577 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 2817 treesize of output 2372 [2023-02-13 23:27:31,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,590 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 2346 treesize of output 1746 [2023-02-13 23:27:31,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,635 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 19008 treesize of output 17207 [2023-02-13 23:27:31,709 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 16737 treesize of output 15545 [2023-02-13 23:27:31,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:31,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 15612 treesize of output 10330 [2023-02-13 23:27:32,310 INFO L321 Elim1Store]: treesize reduction 726, result has 13.6 percent of original size [2023-02-13 23:27:32,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 34 case distinctions, treesize of input 12806 treesize of output 12458 [2023-02-13 23:27:33,451 INFO L321 Elim1Store]: treesize reduction 1171, result has 10.1 percent of original size [2023-02-13 23:27:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 56 case distinctions, treesize of input 74769 treesize of output 73753 [2023-02-13 23:27:34,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:34,974 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 73597 treesize of output 70339 [2023-02-13 23:27:35,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:27:35,755 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 70436 treesize of output 66132 [2023-02-13 23:27:36,521 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 66038 treesize of output 64406 [2023-02-13 23:27:36,910 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 64406 treesize of output 63638 [2023-02-13 23:27:37,280 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 63742 treesize of output 62696 [2023-02-13 23:27:37,666 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 62718 treesize of output 60552 [2023-02-13 23:27:39,589 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 57 treesize of output 45 [2023-02-13 23:29:08,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 23:29:08,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2023-02-13 23:29:09,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-13 23:29:09,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 953 treesize of output 943 [2023-02-13 23:29:29,954 INFO L321 Elim1Store]: treesize reduction 300, result has 24.2 percent of original size [2023-02-13 23:29:29,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 290738 treesize of output 288236 [2023-02-13 23:29:44,580 WARN L233 SmtUtils]: Spent 14.58s on a formula simplification. DAG size of input: 15071 DAG size of output: 14974 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)