./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/tree-4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/heap-manipulation/tree-4.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 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:31:08,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:31:08,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:31:08,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:31:08,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:31:08,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:31:08,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:31:08,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:31:08,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:31:08,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:31:08,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:31:08,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:31:08,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:31:08,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:31:08,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:31:08,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:31:08,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:31:08,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:31:08,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:31:08,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:31:08,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:31:08,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:31:08,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:31:08,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:31:08,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:31:08,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:31:08,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:31:08,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:31:08,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:31:08,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:31:08,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:31:08,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:31:08,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:31:08,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:31:08,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:31:08,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:31:08,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:31:08,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:31:08,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:31:08,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:31:08,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:31:08,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:31:08,979 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:31:08,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:31:08,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:31:08,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:31:08,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:31:08,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:31:08,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:31:08,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:31:08,982 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:31:08,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:31:08,983 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:31:08,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:31:08,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:31:08,984 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:31:08,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:31:08,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:31:08,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:31:08,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:31:08,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:31:08,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:31:08,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:31:08,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:31:08,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:31:08,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:31:08,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:31:08,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:31:08,987 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:31:08,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:31:08,987 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:31:08,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e [2023-02-15 10:31:09,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:31:09,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:31:09,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:31:09,194 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:31:09,194 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:31:09,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-4.i [2023-02-15 10:31:10,085 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:31:10,280 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:31:10,281 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-4.i [2023-02-15 10:31:10,289 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ceefe43/03b7d651d11342fc82635b5d4a574095/FLAG3d68b54a8 [2023-02-15 10:31:10,305 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ceefe43/03b7d651d11342fc82635b5d4a574095 [2023-02-15 10:31:10,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:31:10,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:31:10,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:31:10,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:31:10,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:31:10,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c340e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10, skipping insertion in model container [2023-02-15 10:31:10,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:31:10,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:31:10,553 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/heap-manipulation/tree-4.i[22626,22639] [2023-02-15 10:31:10,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:31:10,592 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:31:10,621 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/heap-manipulation/tree-4.i[22626,22639] [2023-02-15 10:31:10,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:31:10,645 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:31:10,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10 WrapperNode [2023-02-15 10:31:10,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:31:10,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:31:10,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:31:10,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:31:10,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,672 INFO L138 Inliner]: procedures = 122, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2023-02-15 10:31:10,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:31:10,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:31:10,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:31:10,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:31:10,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:31:10,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:31:10,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:31:10,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:31:10,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (1/1) ... [2023-02-15 10:31:10,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:31:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:31:10,742 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) [2023-02-15 10:31:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:31:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-15 10:31:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-15 10:31:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:31:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:31:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:31:10,758 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 [2023-02-15 10:31:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:31:10,901 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:31:10,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:31:11,150 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:31:11,154 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:31:11,159 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-15 10:31:11,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:31:11 BoogieIcfgContainer [2023-02-15 10:31:11,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:31:11,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:31:11,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:31:11,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:31:11,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:31:10" (1/3) ... [2023-02-15 10:31:11,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2591f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:31:11, skipping insertion in model container [2023-02-15 10:31:11,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:10" (2/3) ... [2023-02-15 10:31:11,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2591f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:31:11, skipping insertion in model container [2023-02-15 10:31:11,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:31:11" (3/3) ... [2023-02-15 10:31:11,166 INFO L112 eAbstractionObserver]: Analyzing ICFG tree-4.i [2023-02-15 10:31:11,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:31:11,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:31:11,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:31:11,209 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;@5d1be3da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:31:11,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:31:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 40 states have (on average 1.725) internal successors, (69), 44 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:31:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:31:11,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:11,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:11,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:11,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1979325632, now seen corresponding path program 1 times [2023-02-15 10:31:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:11,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696924689] [2023-02-15 10:31:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696924689] [2023-02-15 10:31:11,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696924689] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:11,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:11,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:31:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324243508] [2023-02-15 10:31:11,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:11,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:31:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:31:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:31:11,343 INFO L87 Difference]: Start difference. First operand has 46 states, 40 states have (on average 1.725) internal successors, (69), 44 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:11,361 INFO L93 Difference]: Finished difference Result 88 states and 147 transitions. [2023-02-15 10:31:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:31:11,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:31:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:11,366 INFO L225 Difference]: With dead ends: 88 [2023-02-15 10:31:11,367 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 10:31:11,369 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 [2023-02-15 10:31:11,374 INFO L413 NwaCegarLoop]: 56 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, 56 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 [2023-02-15 10:31:11,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:31:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 10:31:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 10:31:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-02-15 10:31:11,397 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2023-02-15 10:31:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:11,397 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-02-15 10:31:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-02-15 10:31:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:31:11,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:11,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:11,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:31:11,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1335578817, now seen corresponding path program 1 times [2023-02-15 10:31:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218937685] [2023-02-15 10:31:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218937685] [2023-02-15 10:31:11,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218937685] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:11,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:11,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:31:11,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624989782] [2023-02-15 10:31:11,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:31:11,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:31:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:11,465 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:11,505 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-02-15 10:31:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:31:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 10:31:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:11,508 INFO L225 Difference]: With dead ends: 57 [2023-02-15 10:31:11,508 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 10:31:11,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:11,514 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:11,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:31:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 10:31:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-15 10:31:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-02-15 10:31:11,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 12 [2023-02-15 10:31:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:11,524 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-02-15 10:31:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-02-15 10:31:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:31:11,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:11,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:11,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:31:11,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2144925443, now seen corresponding path program 1 times [2023-02-15 10:31:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:11,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403984614] [2023-02-15 10:31:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403984614] [2023-02-15 10:31:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403984614] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:11,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:11,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:31:11,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983556793] [2023-02-15 10:31:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:31:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:31:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:31:11,662 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:11,718 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2023-02-15 10:31:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:31:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 10:31:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:11,719 INFO L225 Difference]: With dead ends: 73 [2023-02-15 10:31:11,719 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 10:31:11,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:31:11,720 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:11,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:31:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 10:31:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-02-15 10:31:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-02-15 10:31:11,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 12 [2023-02-15 10:31:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:11,725 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-02-15 10:31:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-02-15 10:31:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 10:31:11,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:11,726 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 10:31:11,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1456438760, now seen corresponding path program 1 times [2023-02-15 10:31:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25963021] [2023-02-15 10:31:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:11,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25963021] [2023-02-15 10:31:11,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25963021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:11,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:11,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:31:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158411578] [2023-02-15 10:31:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:11,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:31:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:31:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:11,802 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:11,845 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-02-15 10:31:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:31:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 10:31:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:11,846 INFO L225 Difference]: With dead ends: 59 [2023-02-15 10:31:11,847 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 10:31:11,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:11,848 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:11,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:31:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 10:31:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-02-15 10:31:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-15 10:31:11,852 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 18 [2023-02-15 10:31:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:11,852 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-15 10:31:11,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-15 10:31:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:31:11,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:11,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:31:11,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -53531200, now seen corresponding path program 1 times [2023-02-15 10:31:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225893326] [2023-02-15 10:31:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:31:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225893326] [2023-02-15 10:31:12,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225893326] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:12,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:12,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:31:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688893843] [2023-02-15 10:31:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:31:12,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:31:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:31:12,162 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:12,288 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-02-15 10:31:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:31:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 10:31:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:12,289 INFO L225 Difference]: With dead ends: 80 [2023-02-15 10:31:12,289 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 10:31:12,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:31:12,291 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:12,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 83 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:31:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 10:31:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2023-02-15 10:31:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-02-15 10:31:12,295 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2023-02-15 10:31:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:12,295 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-02-15 10:31:12,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-02-15 10:31:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 10:31:12,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:12,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:12,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 10:31:12,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2012239088, now seen corresponding path program 1 times [2023-02-15 10:31:12,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:12,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340451846] [2023-02-15 10:31:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:16,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340451846] [2023-02-15 10:31:16,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340451846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:31:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303838015] [2023-02-15 10:31:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:16,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:31:16,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:31:16,465 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) [2023-02-15 10:31:16,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:31:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:16,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 89 conjunts are in the unsatisfiable core [2023-02-15 10:31:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:16,696 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 [2023-02-15 10:31:16,805 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 [2023-02-15 10:31:16,814 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 10:31:16,815 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 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-15 10:31:16,943 INFO L321 Elim1Store]: treesize reduction 152, result has 10.1 percent of original size [2023-02-15 10:31:16,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 448 treesize of output 368 [2023-02-15 10:31:17,063 INFO L321 Elim1Store]: treesize reduction 292, result has 14.6 percent of original size [2023-02-15 10:31:17,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 467 treesize of output 682 [2023-02-15 10:31:17,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:31:17,084 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 221 treesize of output 193 [2023-02-15 10:31:17,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 459 treesize of output 439 [2023-02-15 10:31:17,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 35 treesize of output 7 [2023-02-15 10:31:17,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 35 treesize of output 7 [2023-02-15 10:31:17,428 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 1636 treesize of output 1542 [2023-02-15 10:31:17,800 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2023-02-15 10:31:17,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 10:31:18,006 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no need to replace index at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructDerEnabler(DerPreprocessor.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-02-15 10:31:18,010 INFO L158 Benchmark]: Toolchain (without parser) took 7701.48ms. Allocated memory was 178.3MB in the beginning and 423.6MB in the end (delta: 245.4MB). Free memory was 147.9MB in the beginning and 220.8MB in the end (delta: -72.9MB). Peak memory consumption was 173.3MB. Max. memory is 16.1GB. [2023-02-15 10:31:18,010 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 10:31:18,010 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.99ms. Allocated memory is still 178.3MB. Free memory was 147.3MB in the beginning and 130.5MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-02-15 10:31:18,011 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.85ms. Allocated memory is still 178.3MB. Free memory was 130.5MB in the beginning and 127.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 10:31:18,011 INFO L158 Benchmark]: Boogie Preprocessor took 33.34ms. Allocated memory is still 178.3MB. Free memory was 127.7MB in the beginning and 126.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 10:31:18,011 INFO L158 Benchmark]: RCFGBuilder took 453.83ms. Allocated memory is still 178.3MB. Free memory was 126.3MB in the beginning and 133.5MB in the end (delta: -7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 10:31:18,011 INFO L158 Benchmark]: TraceAbstraction took 6846.54ms. Allocated memory was 178.3MB in the beginning and 423.6MB in the end (delta: 245.4MB). Free memory was 132.7MB in the beginning and 220.8MB in the end (delta: -88.1MB). Peak memory consumption was 160.3MB. Max. memory is 16.1GB. [2023-02-15 10:31:18,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 90.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.99ms. Allocated memory is still 178.3MB. Free memory was 147.3MB in the beginning and 130.5MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.85ms. Allocated memory is still 178.3MB. Free memory was 130.5MB in the beginning and 127.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.34ms. Allocated memory is still 178.3MB. Free memory was 127.7MB in the beginning and 126.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 453.83ms. Allocated memory is still 178.3MB. Free memory was 126.3MB in the beginning and 133.5MB in the end (delta: -7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6846.54ms. Allocated memory was 178.3MB in the beginning and 423.6MB in the end (delta: 245.4MB). Free memory was 132.7MB in the beginning and 220.8MB in the end (delta: -88.1MB). Peak memory consumption was 160.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no need to replace index de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no need to replace index: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-02-15 10:31:18,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/heap-manipulation/tree-4.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:31:19,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:31:19,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:31:19,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:31:19,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:31:19,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:31:19,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:31:19,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:31:19,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:31:19,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:31:19,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:31:19,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:31:19,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:31:19,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:31:19,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:31:19,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:31:19,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:31:19,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:31:19,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:31:19,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:31:19,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:31:19,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:31:19,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:31:19,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:31:19,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:31:19,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:31:19,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:31:19,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:31:19,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:31:19,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:31:19,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:31:19,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:31:19,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:31:19,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:31:19,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:31:19,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:31:19,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:31:19,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:31:19,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:31:19,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:31:19,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:31:19,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 10:31:19,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:31:19,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:31:19,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:31:19,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:31:19,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:31:19,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:31:19,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:31:19,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:31:19,867 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:31:19,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 10:31:19,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 10:31:19,869 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 10:31:19,869 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:31:19,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:31:19,869 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:31:19,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:31:19,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:31:19,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:31:19,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:31:19,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:31:19,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:31:19,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:31:19,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:31:19,872 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 10:31:19,872 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:31:19,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cf6e13715dcd5309cb599b4358d41a64464f02c52b3716bc554a9d0e833f5e [2023-02-15 10:31:20,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:31:20,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:31:20,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:31:20,133 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:31:20,134 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:31:20,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-4.i [2023-02-15 10:31:21,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:31:21,286 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:31:21,286 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-4.i [2023-02-15 10:31:21,298 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4bfe5c77/94894a91da834187bdacd25405cd8cf5/FLAGd066ccea4 [2023-02-15 10:31:21,311 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4bfe5c77/94894a91da834187bdacd25405cd8cf5 [2023-02-15 10:31:21,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:31:21,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:31:21,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:31:21,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:31:21,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:31:21,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f739b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21, skipping insertion in model container [2023-02-15 10:31:21,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:31:21,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:31:21,573 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/heap-manipulation/tree-4.i[22626,22639] [2023-02-15 10:31:21,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:31:21,614 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:31:21,645 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/heap-manipulation/tree-4.i[22626,22639] [2023-02-15 10:31:21,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:31:21,675 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:31:21,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21 WrapperNode [2023-02-15 10:31:21,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:31:21,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:31:21,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:31:21,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:31:21,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,709 INFO L138 Inliner]: procedures = 125, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 145 [2023-02-15 10:31:21,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:31:21,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:31:21,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:31:21,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:31:21,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,744 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:31:21,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:31:21,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:31:21,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:31:21,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (1/1) ... [2023-02-15 10:31:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:31:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:31:21,800 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) [2023-02-15 10:31:21,809 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 [2023-02-15 10:31:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-02-15 10:31:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-15 10:31:21,828 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-15 10:31:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:31:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:31:21,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:31:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:31:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:31:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-02-15 10:31:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 10:31:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:31:21,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:31:21,944 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:31:21,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:31:22,675 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:31:22,679 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:31:22,680 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-15 10:31:22,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:31:22 BoogieIcfgContainer [2023-02-15 10:31:22,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:31:22,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:31:22,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:31:22,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:31:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:31:21" (1/3) ... [2023-02-15 10:31:22,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe590be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:31:22, skipping insertion in model container [2023-02-15 10:31:22,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:31:21" (2/3) ... [2023-02-15 10:31:22,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe590be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:31:22, skipping insertion in model container [2023-02-15 10:31:22,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:31:22" (3/3) ... [2023-02-15 10:31:22,701 INFO L112 eAbstractionObserver]: Analyzing ICFG tree-4.i [2023-02-15 10:31:22,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:31:22,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:31:22,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:31:22,758 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;@ec382c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:31:22,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:31:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 43 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 10:31:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:31:22,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:22,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:22,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -698675410, now seen corresponding path program 1 times [2023-02-15 10:31:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:22,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863675549] [2023-02-15 10:31:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:22,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:22,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-15 10:31:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 10:31:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:22,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:31:22,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 10:31:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863675549] [2023-02-15 10:31:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863675549] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:22,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:22,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:31:22,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105985291] [2023-02-15 10:31:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:22,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:31:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 10:31:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:31:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:31:22,956 INFO L87 Difference]: Start difference. First operand has 45 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 43 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:22,976 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2023-02-15 10:31:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:31:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:31:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:22,986 INFO L225 Difference]: With dead ends: 86 [2023-02-15 10:31:22,986 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 10:31:22,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:31:22,991 INFO L413 NwaCegarLoop]: 55 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, 55 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 [2023-02-15 10:31:22,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:31:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 10:31:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-15 10:31:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-15 10:31:23,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 11 [2023-02-15 10:31:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:23,016 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-15 10:31:23,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-15 10:31:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:31:23,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:23,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:23,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:23,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:23,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1871281309, now seen corresponding path program 1 times [2023-02-15 10:31:23,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:23,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259181637] [2023-02-15 10:31:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:23,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:23,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-15 10:31:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:31:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:23,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:31:23,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 10:31:23,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259181637] [2023-02-15 10:31:23,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259181637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:23,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:23,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:31:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965464228] [2023-02-15 10:31:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:31:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 10:31:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:31:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:23,349 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:24,028 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-02-15 10:31:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:31:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:31:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:24,037 INFO L225 Difference]: With dead ends: 55 [2023-02-15 10:31:24,037 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 10:31:24,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:24,038 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:24,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 10:31:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 10:31:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 10:31:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-15 10:31:24,044 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 11 [2023-02-15 10:31:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:24,045 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-15 10:31:24,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-15 10:31:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 10:31:24,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:24,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:24,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:24,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:24,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1614339361, now seen corresponding path program 1 times [2023-02-15 10:31:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202066976] [2023-02-15 10:31:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:24,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:24,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:24,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-15 10:31:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:31:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:24,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:31:24,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 10:31:24,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202066976] [2023-02-15 10:31:24,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202066976] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:24,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:24,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:31:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494838889] [2023-02-15 10:31:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:31:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 10:31:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:31:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:31:24,363 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:24,477 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-02-15 10:31:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 10:31:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 10:31:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:24,478 INFO L225 Difference]: With dead ends: 70 [2023-02-15 10:31:24,478 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 10:31:24,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:31:24,479 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:24,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:31:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 10:31:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-02-15 10:31:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-02-15 10:31:24,484 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 11 [2023-02-15 10:31:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:24,484 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-02-15 10:31:24,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-02-15 10:31:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 10:31:24,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:24,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:24,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:24,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1107277079, now seen corresponding path program 1 times [2023-02-15 10:31:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:24,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420530695] [2023-02-15 10:31:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:24,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:24,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:24,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-15 10:31:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 10:31:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:24,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:31:24,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 10:31:24,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420530695] [2023-02-15 10:31:24,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420530695] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:24,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:24,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:31:24,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464478334] [2023-02-15 10:31:24,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:24,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:31:24,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 10:31:24,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:31:24,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:24,798 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:26,420 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2023-02-15 10:31:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:31:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 10:31:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:26,422 INFO L225 Difference]: With dead ends: 57 [2023-02-15 10:31:26,422 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 10:31:26,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:31:26,423 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:26,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 10:31:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 10:31:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-15 10:31:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-15 10:31:26,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2023-02-15 10:31:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:26,427 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-15 10:31:26,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-15 10:31:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 10:31:26,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:26,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:31:26,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:26,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:26,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash 481590258, now seen corresponding path program 1 times [2023-02-15 10:31:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825269748] [2023-02-15 10:31:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:26,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:26,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:26,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:26,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-15 10:31:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:26,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 10:31:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:31:26,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:31:26,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 10:31:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825269748] [2023-02-15 10:31:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825269748] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:26,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:31:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653299320] [2023-02-15 10:31:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:31:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 10:31:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:31:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:31:26,917 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:29,387 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2023-02-15 10:31:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:31:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 10:31:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:29,389 INFO L225 Difference]: With dead ends: 77 [2023-02-15 10:31:29,389 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 10:31:29,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:31:29,390 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:29,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 73 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-15 10:31:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 10:31:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-02-15 10:31:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 10:31:29,395 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2023-02-15 10:31:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:29,395 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 10:31:29,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:31:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 10:31:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 10:31:29,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:29,396 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] [2023-02-15 10:31:29,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:31:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:29,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -342395699, now seen corresponding path program 1 times [2023-02-15 10:31:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 10:31:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37328723] [2023-02-15 10:31:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:29,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 10:31:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 10:31:29,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 10:31:29,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-15 10:31:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:30,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 187 conjunts are in the unsatisfiable core [2023-02-15 10:31:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:31:30,192 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 7 [2023-02-15 10:31:30,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:31:30,254 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-02-15 10:31:30,254 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 17 treesize of output 17 [2023-02-15 10:31:30,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 10:31:30,967 INFO L321 Elim1Store]: treesize reduction 152, result has 10.1 percent of original size [2023-02-15 10:31:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 5356 treesize of output 3772 [2023-02-15 10:31:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:31:35,715 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-02-15 10:31:35,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 3127 treesize of output 2628 [2023-02-15 10:31:35,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:31:35,887 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:31:35,889 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:31:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:31:36,141 INFO L217 Elim1Store]: Index analysis took 340 ms [2023-02-15 10:31:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:32,927 WARN L233 SmtUtils]: Spent 56.71s on a formula simplification. DAG size of input: 56 DAG size of output: 47 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-15 10:32:32,928 INFO L321 Elim1Store]: treesize reduction 231, result has 49.8 percent of original size [2023-02-15 10:32:32,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 2023 treesize of output 3205 [2023-02-15 10:32:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:36,840 INFO L217 Elim1Store]: Index analysis took 795 ms [2023-02-15 10:32:39,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 63 treesize of output 154 [2023-02-15 10:32:40,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:32:40,276 INFO L217 Elim1Store]: Index analysis took 318 ms [2023-02-15 10:34:24,060 WARN L233 SmtUtils]: Spent 1.73m on a formula simplification. DAG size of input: 122 DAG size of output: 33 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-15 10:34:24,060 INFO L321 Elim1Store]: treesize reduction 514, result has 10.9 percent of original size [2023-02-15 10:34:24,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 5197 treesize of output 4754 [2023-02-15 10:34:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:34:25,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 2070 treesize of output 1840 [2023-02-15 10:34:29,038 WARN L207 Elim1Store]: Array PQE input equivalent to false