./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sina3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/array-fpi/sina3.c -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 2aebf3cfbf85ca5d76e40b9ce94a108ab82985532ad1ea09b88a009b3e11ff5a --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:34:57,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:34:57,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:34:57,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:34:57,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:34:57,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:34:57,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:34:57,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:34:57,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:34:57,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:34:57,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:34:57,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:34:57,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:34:57,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:34:57,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:34:57,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:34:57,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:34:57,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:34:57,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:34:57,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:34:57,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:34:57,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:34:57,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:34:57,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:34:57,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:34:57,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:34:57,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:34:57,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:34:57,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:34:57,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:34:57,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:34:57,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:34:57,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:34:57,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:34:57,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:34:57,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:34:57,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:34:57,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:34:57,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:34:57,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:34:57,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:34:57,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:34:57,766 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:34:57,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:34:57,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:34:57,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:34:57,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:34:57,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:34:57,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:34:57,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:34:57,768 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:34:57,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:34:57,769 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:34:57,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:34:57,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:34:57,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:34:57,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:34:57,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:34:57,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:34:57,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:34:57,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:34:57,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:34:57,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:34:57,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:34:57,772 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:34:57,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2aebf3cfbf85ca5d76e40b9ce94a108ab82985532ad1ea09b88a009b3e11ff5a [2023-02-16 00:34:57,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:34:57,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:34:57,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:34:57,985 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:34:57,985 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:34:57,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sina3.c [2023-02-16 00:34:58,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:34:59,014 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:34:59,015 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina3.c [2023-02-16 00:34:59,019 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59ca893c/2a4b2bfc7c174ca78486777b43fa08c8/FLAGd5661e610 [2023-02-16 00:34:59,031 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e59ca893c/2a4b2bfc7c174ca78486777b43fa08c8 [2023-02-16 00:34:59,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:34:59,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:34:59,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:34:59,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:34:59,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:34:59,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d15e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59, skipping insertion in model container [2023-02-16 00:34:59,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:34:59,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:34:59,149 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/array-fpi/sina3.c[588,601] [2023-02-16 00:34:59,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:34:59,170 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:34:59,178 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/array-fpi/sina3.c[588,601] [2023-02-16 00:34:59,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:34:59,192 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:34:59,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59 WrapperNode [2023-02-16 00:34:59,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:34:59,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:34:59,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:34:59,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:34:59,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,214 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 104 [2023-02-16 00:34:59,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:34:59,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:34:59,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:34:59,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:34:59,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:34:59,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:34:59,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:34:59,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:34:59,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (1/1) ... [2023-02-16 00:34:59,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:34:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:34:59,251 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) [2023-02-16 00:34:59,253 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 [2023-02-16 00:34:59,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:34:59,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:34:59,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:34:59,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:34:59,337 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:34:59,339 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:34:59,498 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:34:59,503 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:34:59,503 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-16 00:34:59,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:34:59 BoogieIcfgContainer [2023-02-16 00:34:59,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:34:59,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:34:59,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:34:59,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:34:59,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:34:59" (1/3) ... [2023-02-16 00:34:59,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a520007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:34:59, skipping insertion in model container [2023-02-16 00:34:59,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:34:59" (2/3) ... [2023-02-16 00:34:59,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a520007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:34:59, skipping insertion in model container [2023-02-16 00:34:59,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:34:59" (3/3) ... [2023-02-16 00:34:59,512 INFO L112 eAbstractionObserver]: Analyzing ICFG sina3.c [2023-02-16 00:34:59,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:34:59,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:34:59,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:34:59,573 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;@64b97087, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:34:59,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:34:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) [2023-02-16 00:34:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:34:59,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:34:59,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:34:59,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:34:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:34:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2023-02-16 00:34:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:34:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55412630] [2023-02-16 00:34:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:34:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:34:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:34:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:34:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:34:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55412630] [2023-02-16 00:34:59,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55412630] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:34:59,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:34:59,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:34:59,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565532976] [2023-02-16 00:34:59,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:34:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:34:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:34:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:34:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:34:59,728 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) [2023-02-16 00:34:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:34:59,741 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2023-02-16 00:34:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:34:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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 [2023-02-16 00:34:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:34:59,747 INFO L225 Difference]: With dead ends: 50 [2023-02-16 00:34:59,747 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 00:34:59,750 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 [2023-02-16 00:34:59,753 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-16 00:34:59,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:34:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 00:34:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-16 00:34:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-02-16 00:34:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-16 00:34:59,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2023-02-16 00:34:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:34:59,773 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-16 00:34:59,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) [2023-02-16 00:34:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-16 00:34:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:34:59,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:34:59,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:34:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:34:59,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:34:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:34:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2023-02-16 00:34:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:34:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341951115] [2023-02-16 00:34:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:34:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:34:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:34:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:34:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:34:59,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341951115] [2023-02-16 00:34:59,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341951115] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:34:59,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:34:59,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:34:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286927788] [2023-02-16 00:34:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:34:59,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:34:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:34:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:34:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:34:59,872 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-02-16 00:34:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:34:59,915 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2023-02-16 00:34:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:34:59,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2023-02-16 00:34:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:34:59,917 INFO L225 Difference]: With dead ends: 53 [2023-02-16 00:34:59,917 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 00:34:59,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:34:59,918 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:34:59,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:34:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 00:34:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-02-16 00:34:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2023-02-16 00:34:59,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-16 00:34:59,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2023-02-16 00:34:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:34:59,933 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-16 00:34:59,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-02-16 00:34:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-16 00:34:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 00:34:59,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:34:59,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:34:59,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:34:59,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:34:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:34:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2023-02-16 00:34:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:34:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252966420] [2023-02-16 00:34:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:34:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:35:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:35:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:35:01,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:35:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252966420] [2023-02-16 00:35:01,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252966420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:35:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385135656] [2023-02-16 00:35:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:35:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:35:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:35:01,490 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) [2023-02-16 00:35:01,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:35:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:35:01,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-16 00:35:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:35:01,630 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:35:01,630 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 23 treesize of output 19 [2023-02-16 00:35:01,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 00:35:01,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-16 00:35:01,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-02-16 00:35:01,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2023-02-16 00:35:02,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2023-02-16 00:35:02,145 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 00:35:02,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 46 treesize of output 30 [2023-02-16 00:35:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:35:02,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:35:02,480 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:35:02,480 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:35:02,482 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:35:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:35:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385135656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:35:02,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:35:02,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-16 00:35:02,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559055107] [2023-02-16 00:35:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:35:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 00:35:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:35:02,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 00:35:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 00:35:02,500 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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) [2023-02-16 00:35:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:35:03,640 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2023-02-16 00:35:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 00:35:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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) Word has length 24 [2023-02-16 00:35:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:35:03,641 INFO L225 Difference]: With dead ends: 79 [2023-02-16 00:35:03,641 INFO L226 Difference]: Without dead ends: 77 [2023-02-16 00:35:03,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=2399, Unknown=0, NotChecked=0, Total=2862 [2023-02-16 00:35:03,643 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 157 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:35:03,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 162 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 00:35:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-16 00:35:03,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2023-02-16 00:35:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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) [2023-02-16 00:35:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-16 00:35:03,650 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 24 [2023-02-16 00:35:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:35:03,650 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-16 00:35:03,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 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) [2023-02-16 00:35:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-16 00:35:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 00:35:03,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:35:03,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:35:03,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:35:03,857 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 [2023-02-16 00:35:03,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:35:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:35:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash 924425184, now seen corresponding path program 2 times [2023-02-16 00:35:03,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:35:03,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995349109] [2023-02-16 00:35:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:35:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:35:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:35:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:35:03,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:35:03,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995349109] [2023-02-16 00:35:03,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995349109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:35:03,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913677898] [2023-02-16 00:35:03,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:35:03,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:35:03,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:35:03,925 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) [2023-02-16 00:35:03,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:35:03,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:35:03,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:35:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:35:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:35:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:35:04,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:35:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:35:04,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913677898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:35:04,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:35:04,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 00:35:04,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709258665] [2023-02-16 00:35:04,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:35:04,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 00:35:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:35:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 00:35:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:35:04,062 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-02-16 00:35:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:35:04,273 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2023-02-16 00:35:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 00:35:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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 26 [2023-02-16 00:35:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:35:04,275 INFO L225 Difference]: With dead ends: 99 [2023-02-16 00:35:04,275 INFO L226 Difference]: Without dead ends: 51 [2023-02-16 00:35:04,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-02-16 00:35:04,281 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:35:04,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 94 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:35:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-16 00:35:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2023-02-16 00:35:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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) [2023-02-16 00:35:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-02-16 00:35:04,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2023-02-16 00:35:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:35:04,299 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-02-16 00:35:04,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-02-16 00:35:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-02-16 00:35:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 00:35:04,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:35:04,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:35:04,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 00:35:04,513 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 [2023-02-16 00:35:04,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:35:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:35:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash -826292134, now seen corresponding path program 3 times [2023-02-16 00:35:04,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:35:04,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44204399] [2023-02-16 00:35:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:35:04,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:35:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:35:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:35:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:35:06,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44204399] [2023-02-16 00:35:06,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44204399] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:35:06,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635502846] [2023-02-16 00:35:06,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:35:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:35:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:35:06,565 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) [2023-02-16 00:35:06,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:35:06,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 00:35:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:35:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-16 00:35:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:35:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:06,636 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:35:06,636 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 28 treesize of output 24 [2023-02-16 00:35:06,646 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 11 treesize of output 7 [2023-02-16 00:35:06,684 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 23 treesize of output 22 [2023-02-16 00:35:06,786 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-02-16 00:35:06,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-02-16 00:35:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:06,986 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-16 00:35:06,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2023-02-16 00:35:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,115 INFO L321 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2023-02-16 00:35:07,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 62 [2023-02-16 00:35:07,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:35:07,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,405 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-16 00:35:07,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 55 [2023-02-16 00:35:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:35:07,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2023-02-16 00:35:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2023-02-16 00:35:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:07,887 INFO L321 Elim1Store]: treesize reduction 70, result has 38.6 percent of original size [2023-02-16 00:35:07,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 78 [2023-02-16 00:35:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:35:08,226 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 00:35:08,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 50 treesize of output 34 [2023-02-16 00:35:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:35:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:36:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:36:02,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635502846] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:36:02,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:36:02,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2023-02-16 00:36:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127111224] [2023-02-16 00:36:02,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:36:02,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-16 00:36:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:36:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-16 00:36:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=3937, Unknown=17, NotChecked=0, Total=4422 [2023-02-16 00:36:02,571 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 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) [2023-02-16 00:36:47,242 WARN L233 SmtUtils]: Spent 33.24s on a formula simplification. DAG size of input: 133 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:36:49,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:36:51,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:36:53,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:36:55,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:36:58,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:00,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:02,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:04,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:27,409 WARN L233 SmtUtils]: Spent 12.40s on a formula simplification. DAG size of input: 109 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:37:37,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:39,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:41,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:37:43,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:39:08,708 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 136 DAG size of output: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)