./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/dll-sorted-1.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 635ef9d2e243ceee348a174080644f4e80f3ae61 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-05 01:07:45,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 01:07:45,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 01:07:45,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 01:07:45,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 01:07:45,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 01:07:45,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 01:07:45,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 01:07:45,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 01:07:45,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 01:07:45,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 01:07:45,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 01:07:45,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 01:07:45,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 01:07:45,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 01:07:45,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 01:07:45,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 01:07:45,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 01:07:45,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 01:07:45,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 01:07:45,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 01:07:45,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 01:07:45,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 01:07:45,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 01:07:45,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 01:07:45,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 01:07:45,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 01:07:45,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 01:07:45,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 01:07:45,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 01:07:45,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 01:07:45,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 01:07:45,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 01:07:45,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 01:07:45,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 01:07:45,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 01:07:45,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 01:07:45,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 01:07:45,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 01:07:45,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 01:07:45,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 01:07:45,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 01:07:45,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 01:07:45,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 01:07:45,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 01:07:45,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 01:07:45,929 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 01:07:45,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 01:07:45,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 01:07:45,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 01:07:45,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 01:07:45,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 01:07:45,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 01:07:45,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 01:07:45,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 01:07:45,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 01:07:45,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 01:07:45,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 01:07:45,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 01:07:45,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 01:07:45,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 635ef9d2e243ceee348a174080644f4e80f3ae61 [2021-07-05 01:07:46,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 01:07:46,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 01:07:46,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 01:07:46,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 01:07:46,178 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 01:07:46,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-07-05 01:07:46,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7627bed9a/d15e00ea7d194523b0f0481a7b7f771f/FLAG5876c793c [2021-07-05 01:07:46,611 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 01:07:46,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i [2021-07-05 01:07:46,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7627bed9a/d15e00ea7d194523b0f0481a7b7f771f/FLAG5876c793c [2021-07-05 01:07:46,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7627bed9a/d15e00ea7d194523b0f0481a7b7f771f [2021-07-05 01:07:46,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 01:07:46,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 01:07:46,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 01:07:46,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 01:07:46,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 01:07:46,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:46,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7eb8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46, skipping insertion in model container [2021-07-05 01:07:46,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:46,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 01:07:46,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 01:07:46,823 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-07-05 01:07:46,840 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-07-05 01:07:46,847 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-07-05 01:07:46,848 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-07-05 01:07:46,850 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-07-05 01:07:46,850 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-07-05 01:07:46,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 01:07:46,867 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 01:07:46,896 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22384,22397] [2021-07-05 01:07:46,909 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22614,22627] [2021-07-05 01:07:46,917 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[22989,23002] [2021-07-05 01:07:46,918 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23053,23066] [2021-07-05 01:07:46,920 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23184,23197] [2021-07-05 01:07:46,921 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-sorted-1.i[23248,23261] [2021-07-05 01:07:46,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 01:07:46,961 INFO L208 MainTranslator]: Completed translation [2021-07-05 01:07:46,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46 WrapperNode [2021-07-05 01:07:46,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 01:07:46,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 01:07:46,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 01:07:46,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 01:07:46,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:46,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:46,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 01:07:47,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 01:07:47,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 01:07:47,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 01:07:47,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 01:07:47,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 01:07:47,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 01:07:47,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 01:07:47,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (1/1) ... [2021-07-05 01:07:47,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 01:07:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 01:07:47,048 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) [2021-07-05 01:07:47,068 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 [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-05 01:07:47,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 01:07:47,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 01:07:47,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 01:07:47,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 01:07:47,503 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-07-05 01:07:47,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:07:47 BoogieIcfgContainer [2021-07-05 01:07:47,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 01:07:47,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 01:07:47,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 01:07:47,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 01:07:47,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 01:07:46" (1/3) ... [2021-07-05 01:07:47,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c1f6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 01:07:47, skipping insertion in model container [2021-07-05 01:07:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:07:46" (2/3) ... [2021-07-05 01:07:47,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c1f6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 01:07:47, skipping insertion in model container [2021-07-05 01:07:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:07:47" (3/3) ... [2021-07-05 01:07:47,512 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2021-07-05 01:07:47,516 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 01:07:47,517 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-07-05 01:07:47,545 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 01:07:47,549 INFO L329 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 01:07:47,549 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 01:07:47,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-05 01:07:47,562 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:47,563 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-05 01:07:47,563 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash 890153286, now seen corresponding path program 1 times [2021-07-05 01:07:47,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:47,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125615365] [2021-07-05 01:07:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:47,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:07:47,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:07:47,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:07:47,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125615365] [2021-07-05 01:07:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125615365] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:07:47,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:07:47,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-05 01:07:47,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544688868] [2021-07-05 01:07:47,723 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-05 01:07:47,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:07:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-05 01:07:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-05 01:07:47,735 INFO L87 Difference]: Start difference. First operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:07:47,766 INFO L93 Difference]: Finished difference Result 106 states and 172 transitions. [2021-07-05 01:07:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-05 01:07:47,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-05 01:07:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:07:47,772 INFO L225 Difference]: With dead ends: 106 [2021-07-05 01:07:47,773 INFO L226 Difference]: Without dead ends: 10 [2021-07-05 01:07:47,775 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-05 01:07:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-07-05 01:07:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-07-05 01:07:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-07-05 01:07:47,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-07-05 01:07:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:07:47,795 INFO L442 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-07-05 01:07:47,795 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-07-05 01:07:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-05 01:07:47,796 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:47,796 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:07:47,797 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 01:07:47,797 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1806859191, now seen corresponding path program 1 times [2021-07-05 01:07:47,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:47,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203849921] [2021-07-05 01:07:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:47,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:07:47,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:07:47,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:07:47,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:07:47,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203849921] [2021-07-05 01:07:47,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203849921] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:07:47,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:07:47,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 01:07:47,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611417616] [2021-07-05 01:07:47,866 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 01:07:47,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:07:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 01:07:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:07:47,870 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:07:47,897 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-07-05 01:07:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 01:07:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-07-05 01:07:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:07:47,899 INFO L225 Difference]: With dead ends: 22 [2021-07-05 01:07:47,899 INFO L226 Difference]: Without dead ends: 14 [2021-07-05 01:07:47,899 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:07:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-07-05 01:07:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-07-05 01:07:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-07-05 01:07:47,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2021-07-05 01:07:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:07:47,906 INFO L442 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-07-05 01:07:47,906 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-07-05 01:07:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-05 01:07:47,907 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:47,914 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:07:47,914 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-05 01:07:47,915 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 443319948, now seen corresponding path program 1 times [2021-07-05 01:07:47,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:47,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201475228] [2021-07-05 01:07:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:47,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:07:47,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 01:07:47,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 01:07:47,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:47,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-05 01:07:47,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:07:47,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201475228] [2021-07-05 01:07:47,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201475228] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:07:47,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:07:47,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-05 01:07:47,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109578323] [2021-07-05 01:07:47,986 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-05 01:07:47,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:07:47,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-05 01:07:47,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-05 01:07:47,987 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:07:48,004 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2021-07-05 01:07:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 01:07:48,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-05 01:07:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:07:48,005 INFO L225 Difference]: With dead ends: 14 [2021-07-05 01:07:48,005 INFO L226 Difference]: Without dead ends: 0 [2021-07-05 01:07:48,005 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-05 01:07:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-05 01:07:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-05 01:07:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-05 01:07:48,006 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-07-05 01:07:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:07:48,006 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-05 01:07:48,006 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-05 01:07:48,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-05 01:07:48,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-05 01:07:48,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:07:48,055 INFO L762 garLoopResultBuilder]: For program point L1059-3(lines 1059 1065) no Hoare annotation was computed. [2021-07-05 01:07:48,055 INFO L765 garLoopResultBuilder]: At program point L1059-5(lines 1059 1065) the Hoare annotation is: true [2021-07-05 01:07:48,056 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 1038) no Hoare annotation was computed. [2021-07-05 01:07:48,056 INFO L762 garLoopResultBuilder]: For program point L1027-1(line 1027) no Hoare annotation was computed. [2021-07-05 01:07:48,056 INFO L762 garLoopResultBuilder]: For program point L1027-3(line 1027) no Hoare annotation was computed. [2021-07-05 01:07:48,057 INFO L758 garLoopResultBuilder]: At program point L1027-4(line 1027) the Hoare annotation is: (and (not (= ULTIMATE.start_main_~x~0.base 0)) (not (= ULTIMATE.start_main_~head~0.base 0))) [2021-07-05 01:07:48,058 INFO L762 garLoopResultBuilder]: For program point L1027-5(line 1027) no Hoare annotation was computed. [2021-07-05 01:07:48,058 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-05 01:07:48,058 INFO L762 garLoopResultBuilder]: For program point L1045(lines 1045 1054) no Hoare annotation was computed. [2021-07-05 01:07:48,058 INFO L762 garLoopResultBuilder]: For program point L1045-2(lines 1045 1054) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1062-1(line 1062) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1062-2(line 1062) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1062-4(line 1062) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L765 garLoopResultBuilder]: At program point L1062-5(line 1062) the Hoare annotation is: true [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1063(line 1063) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1030-1(line 1030) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1063-2(line 1063) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1063-3(lines 1060 1065) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1030-3(lines 1030 1033) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1063-4(line 1063) no Hoare annotation was computed. [2021-07-05 01:07:48,059 INFO L765 garLoopResultBuilder]: At program point L1030-5(lines 1030 1033) the Hoare annotation is: true [2021-07-05 01:07:48,059 INFO L762 garLoopResultBuilder]: For program point L1014(lines 1014 1017) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1014-2(lines 1007 1023) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L765 garLoopResultBuilder]: At program point L1082(lines 994 1083) the Hoare annotation is: true [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1066-1(lines 995 1083) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1066-2(lines 1066 1072) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 1062) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1035(line 1035) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1035-2(lines 1035 1039) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point L1035-4(lines 1035 1039) no Hoare annotation was computed. [2021-07-05 01:07:48,060 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 1069) no Hoare annotation was computed. [2021-07-05 01:07:48,061 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-05 01:07:48,061 INFO L758 garLoopResultBuilder]: At program point L1019-1(lines 1006 1023) the Hoare annotation is: (and (not (= ULTIMATE.start_main_~x~0.base 0)) (not (= ULTIMATE.start_main_~head~0.base 0))) [2021-07-05 01:07:48,061 INFO L762 garLoopResultBuilder]: For program point L1069-1(line 1069) no Hoare annotation was computed. [2021-07-05 01:07:48,061 INFO L762 garLoopResultBuilder]: For program point L1069-2(line 1069) no Hoare annotation was computed. [2021-07-05 01:07:48,061 INFO L762 garLoopResultBuilder]: For program point L1069-4(line 1069) no Hoare annotation was computed. [2021-07-05 01:07:48,061 INFO L765 garLoopResultBuilder]: At program point L1069-5(line 1069) the Hoare annotation is: true [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 1063) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1070(line 1070) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1070-2(line 1070) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1070-3(lines 1067 1072) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1070-4(line 1070) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1038-1(line 1038) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1038-2(line 1038) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1038-4(line 1038) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L765 garLoopResultBuilder]: At program point L1038-5(line 1038) the Hoare annotation is: true [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1038-6(lines 995 1083) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 1070) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1006-1(lines 1006 1023) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L1006-3(lines 1006 1023) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-05 01:07:48,062 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1027) no Hoare annotation was computed. [2021-07-05 01:07:48,063 INFO L765 garLoopResultBuilder]: At program point L1075-2(lines 1075 1080) the Hoare annotation is: true [2021-07-05 01:07:48,063 INFO L762 garLoopResultBuilder]: For program point L1075-3(lines 1075 1080) no Hoare annotation was computed. [2021-07-05 01:07:48,063 INFO L762 garLoopResultBuilder]: For program point L1059-1(line 1059) no Hoare annotation was computed. [2021-07-05 01:07:48,063 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-05 01:07:48,063 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 01:07:48,065 INFO L303 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION was SAFE (1/6) [2021-07-05 01:07:48,069 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 01:07:48,074 INFO L329 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 01:07:48,074 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 01:07:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-05 01:07:48,080 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:48,080 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:07:48,081 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash -722111902, now seen corresponding path program 1 times [2021-07-05 01:07:48,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:48,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236944930] [2021-07-05 01:07:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:48,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:07:48,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:48,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:48,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:48,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:07:48,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:07:48,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236944930] [2021-07-05 01:07:48,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236944930] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:07:48,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:07:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-05 01:07:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818731944] [2021-07-05 01:07:48,104 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-05 01:07:48,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:07:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-05 01:07:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-05 01:07:48,105 INFO L87 Difference]: Start difference. First operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:07:48,116 INFO L93 Difference]: Finished difference Result 106 states and 172 transitions. [2021-07-05 01:07:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-05 01:07:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-05 01:07:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:07:48,117 INFO L225 Difference]: With dead ends: 106 [2021-07-05 01:07:48,117 INFO L226 Difference]: Without dead ends: 21 [2021-07-05 01:07:48,119 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-05 01:07:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-07-05 01:07:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-07-05 01:07:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-07-05 01:07:48,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-07-05 01:07:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:07:48,125 INFO L442 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-07-05 01:07:48,125 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-07-05 01:07:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-05 01:07:48,126 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:48,126 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:07:48,126 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-05 01:07:48,126 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash -690677139, now seen corresponding path program 1 times [2021-07-05 01:07:48,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:48,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711799346] [2021-07-05 01:07:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:48,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:07:48,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:48,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:48,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:48,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:07:48,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:07:48,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:07:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:07:48,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:07:48,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711799346] [2021-07-05 01:07:48,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711799346] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:07:48,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:07:48,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 01:07:48,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523740749] [2021-07-05 01:07:48,161 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 01:07:48,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:07:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 01:07:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:07:48,162 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:07:48,183 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-07-05 01:07:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 01:07:48,183 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-05 01:07:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:07:48,184 INFO L225 Difference]: With dead ends: 44 [2021-07-05 01:07:48,184 INFO L226 Difference]: Without dead ends: 25 [2021-07-05 01:07:48,184 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:07:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-07-05 01:07:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-07-05 01:07:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-07-05 01:07:48,188 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2021-07-05 01:07:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:07:48,189 INFO L442 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-07-05 01:07:48,189 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:07:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-07-05 01:07:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-05 01:07:48,189 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:07:48,189 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:07:48,189 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-05 01:07:48,190 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:07:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:07:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1236050174, now seen corresponding path program 1 times [2021-07-05 01:07:48,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:07:48,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039780973] [2021-07-05 01:07:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:07:48,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:07:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 01:07:48,235 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 01:07:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 01:07:48,261 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 01:07:48,287 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-05 01:07:48,287 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-05 01:07:48,288 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-05 01:07:48,288 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 01:07:48,288 INFO L303 ceAbstractionStarter]: Result for error location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION was UNSAFE (2/6) [2021-07-05 01:07:48,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 01:07:48 BoogieIcfgContainer [2021-07-05 01:07:48,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 01:07:48,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 01:07:48,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 01:07:48,327 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 01:07:48,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:07:47" (3/4) ... [2021-07-05 01:07:48,330 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-05 01:07:48,361 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 01:07:48,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 01:07:48,362 INFO L168 Benchmark]: Toolchain (without parser) took 1727.35 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 39.6 MB in the beginning and 65.1 MB in the end (delta: -25.5 MB). Peak memory consumption was 659.8 kB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,362 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 01:07:48,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.65 ms. Allocated memory is still 60.8 MB. Free memory was 39.4 MB in the beginning and 31.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.76 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 28.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,362 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 60.8 MB. Free memory was 28.9 MB in the beginning and 27.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,362 INFO L168 Benchmark]: RCFGBuilder took 478.24 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 26.8 MB in the beginning and 46.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,363 INFO L168 Benchmark]: TraceAbstraction took 820.36 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 46.0 MB in the beginning and 67.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,363 INFO L168 Benchmark]: Witness Printer took 33.90 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 01:07:48,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.65 ms. Allocated memory is still 60.8 MB. Free memory was 39.4 MB in the beginning and 31.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.76 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 28.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 60.8 MB. Free memory was 28.9 MB in the beginning and 27.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 478.24 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 26.8 MB in the beginning and 46.6 MB in the end (delta: -19.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 820.36 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 46.0 MB in the beginning and 67.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Witness Printer took 33.90 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 65.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 1027]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - CounterExampleResult [Line: 1038]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1002] SLL* x = head; [L1003] int marked = 0; [L1006] COND TRUE __VERIFIER_nondet_int() || !marked [L1009] x->next = malloc(sizeof(SLL)) [L1010] EXPR x->next [L1010] x->next->prev = x [L1011] EXPR x->next [L1011] x = x->next [L1012] x->next = ((void*)0) [L1014] COND TRUE __VERIFIER_nondet_int() [L1016] marked = 1 [L1019] COND TRUE \read(marked) [L1020] x->data = 1 [L1006] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1025] x = head [L1027] COND FALSE !(!(((void*)0) != x)) [L1028] marked = 0 [L1030] EXPR x->next [L1030] x->next != ((void*)0) && x->next->data == 0 [L1030] EXPR x->next [L1030] EXPR x->next->data [L1030] x->next != ((void*)0) && x->next->data == 0 [L1030] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1035] EXPR x->next [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1035] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1035] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1037] EXPR x->next [L1037] x = x->next [L1038] EXPR x->data [L1038] COND TRUE !(x->data != 1) [L1038] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 522.5ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 7.4ms, AutomataDifference: 103.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 45.5ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 83 SDtfs, 11 SDslu, 8 SDs, 0 SdLazy, 10 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 19 NumberOfFragments, 25 HoareAnnotationTreeSize, 9 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 22.9ms HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 18.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 12.6ms SsaConstructionTime, 53.1ms SatisfiabilityAnalysisTime, 122.8ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 219.6ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 3.0ms, AutomataDifference: 36.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 92 SDtfs, 17 SDslu, 6 SDs, 0 SdLazy, 6 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.2ms SsaConstructionTime, 57.2ms SatisfiabilityAnalysisTime, 23.8ms InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - InvariantResult [Line: 1038]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1059]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1069]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1030]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1062]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1075]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1027]: Loop Invariant Derived loop invariant: !(x == 0) && !(head == 0) - InvariantResult [Line: 994]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1006]: Loop Invariant Derived loop invariant: !(x == 0) && !(head == 0) RESULT: Ultimate proved your program to be incorrect! [2021-07-05 01:07:48,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...