./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.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/list-simple/dll2n_update_all_reverse.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 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-05 01:47:28,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 01:47:28,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 01:47:28,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 01:47:28,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 01:47:28,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 01:47:28,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 01:47:28,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 01:47:28,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 01:47:28,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 01:47:28,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 01:47:28,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 01:47:28,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 01:47:29,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 01:47:29,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 01:47:29,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 01:47:29,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 01:47:29,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 01:47:29,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 01:47:29,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 01:47:29,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 01:47:29,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 01:47:29,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 01:47:29,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 01:47:29,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 01:47:29,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 01:47:29,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 01:47:29,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 01:47:29,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 01:47:29,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 01:47:29,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 01:47:29,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 01:47:29,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 01:47:29,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 01:47:29,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 01:47:29,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 01:47:29,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 01:47:29,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 01:47:29,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 01:47:29,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 01:47:29,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 01:47:29,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 01:47:29,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 01:47:29,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 01:47:29,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 01:47:29,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 01:47:29,057 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 01:47:29,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 01:47:29,057 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 01:47:29,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 01:47:29,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 01:47:29,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 01:47:29,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 01:47:29,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 01:47:29,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 01:47:29,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 01:47:29,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 01:47:29,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 01:47:29,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 01:47:29,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 01:47:29,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 01:47:29,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 01:47:29,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 01:47:29,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 01:47:29,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 01:47:29,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 01:47:29,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 01:47:29,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 01:47:29,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 01:47:29,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 01:47:29,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 [2021-07-05 01:47:29,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 01:47:29,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 01:47:29,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 01:47:29,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 01:47:29,439 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 01:47:29,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-07-05 01:47:29,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed51ff2e/7c65ebbe3a8a4406977b5c32d4e17c9f/FLAG8716a6450 [2021-07-05 01:47:29,917 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 01:47:29,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2021-07-05 01:47:29,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed51ff2e/7c65ebbe3a8a4406977b5c32d4e17c9f/FLAG8716a6450 [2021-07-05 01:47:30,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ed51ff2e/7c65ebbe3a8a4406977b5c32d4e17c9f [2021-07-05 01:47:30,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 01:47:30,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 01:47:30,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 01:47:30,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 01:47:30,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 01:47:30,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c55f359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30, skipping insertion in model container [2021-07-05 01:47:30,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 01:47:30,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 01:47:30,693 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/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-07-05 01:47:30,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 01:47:30,700 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 01:47:30,728 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/list-simple/dll2n_update_all_reverse.i[24473,24486] [2021-07-05 01:47:30,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 01:47:30,764 INFO L208 MainTranslator]: Completed translation [2021-07-05 01:47:30,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30 WrapperNode [2021-07-05 01:47:30,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 01:47:30,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 01:47:30,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 01:47:30,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 01:47:30,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 01:47:30,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 01:47:30,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 01:47:30,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 01:47:30,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 01:47:30,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 01:47:30,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 01:47:30,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 01:47:30,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (1/1) ... [2021-07-05 01:47:30,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 01:47:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 01:47:30,825 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 01:47:30,840 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 01:47:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-05 01:47:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-05 01:47:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-05 01:47:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-07-05 01:47:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 01:47:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-07-05 01:47:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-05 01:47:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 01:47:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 01:47:30,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 01:47:31,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 01:47:31,239 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-07-05 01:47:31,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:47:31 BoogieIcfgContainer [2021-07-05 01:47:31,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 01:47:31,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 01:47:31,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 01:47:31,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 01:47:31,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 01:47:30" (1/3) ... [2021-07-05 01:47:31,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70aa905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 01:47:31, skipping insertion in model container [2021-07-05 01:47:31,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 01:47:30" (2/3) ... [2021-07-05 01:47:31,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70aa905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 01:47:31, skipping insertion in model container [2021-07-05 01:47:31,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:47:31" (3/3) ... [2021-07-05 01:47:31,249 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2021-07-05 01:47:31,254 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 01:47:31,255 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 01:47:31,285 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 01:47:31,289 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 01:47:31,289 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 01:47:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:47:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-05 01:47:31,302 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:47:31,302 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:47:31,303 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:47:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:47:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2021-07-05 01:47:31,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:47:31,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282033538] [2021-07-05 01:47:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:47:31,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:47:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:47:31,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-05 01:47:31,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,430 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 01:47:31,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:47:31,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282033538] [2021-07-05 01:47:31,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282033538] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:47:31,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:47:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 01:47:31,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511502038] [2021-07-05 01:47:31,435 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 01:47:31,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:47:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 01:47:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:47:31,445 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 01:47:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:47:31,464 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2021-07-05 01:47:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 01:47:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 01:47:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:47:31,470 INFO L225 Difference]: With dead ends: 56 [2021-07-05 01:47:31,470 INFO L226 Difference]: Without dead ends: 27 [2021-07-05 01:47:31,472 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:47:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-07-05 01:47:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-07-05 01:47:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:47:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-07-05 01:47:31,493 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2021-07-05 01:47:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:47:31,493 INFO L442 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-07-05 01:47:31,493 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 01:47:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-07-05 01:47:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-05 01:47:31,494 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:47:31,494 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:47:31,495 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 01:47:31,495 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:47:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:47:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash -780239213, now seen corresponding path program 1 times [2021-07-05 01:47:31,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:47:31,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943260700] [2021-07-05 01:47:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:47:31,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:47:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:47:31,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 01:47:31,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:47:31,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:47:31,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943260700] [2021-07-05 01:47:31,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943260700] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:47:31,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:47:31,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-05 01:47:31,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909823179] [2021-07-05 01:47:31,587 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-05 01:47:31,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:47:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-05 01:47:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:47:31,591 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 01:47:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:47:31,611 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-07-05 01:47:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-05 01:47:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-07-05 01:47:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:47:31,613 INFO L225 Difference]: With dead ends: 47 [2021-07-05 01:47:31,613 INFO L226 Difference]: Without dead ends: 27 [2021-07-05 01:47:31,614 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-05 01:47:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-07-05 01:47:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-07-05 01:47:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:47:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-07-05 01:47:31,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2021-07-05 01:47:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:47:31,632 INFO L442 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-07-05 01:47:31,632 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 01:47:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-07-05 01:47:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-05 01:47:31,635 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:47:31,636 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:47:31,636 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-05 01:47:31,636 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:47:31,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:47:31,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1367045227, now seen corresponding path program 1 times [2021-07-05 01:47:31,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:47:31,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820068934] [2021-07-05 01:47:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:47:31,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:47:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:47:31,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-05 01:47:31,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:47:31,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:47:31,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820068934] [2021-07-05 01:47:31,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820068934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-05 01:47:31,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861256884] [2021-07-05 01:47:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:47:31,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-05 01:47:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 01:47:31,707 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) [2021-07-05 01:47:31,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-07-05 01:47:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:47:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-05 01:47:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-05 01:47:31,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,802 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-05 01:47:31,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 01:47:31,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-05 01:47:31,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-05 01:47:31,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,842 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,845 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 01:47:31,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-05 01:47:31,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-05 01:47:31,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 01:47:31,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-05 01:47:31,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-05 01:47:31,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 01:47:31,880 INFO L142 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-07-05 01:47:31,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,909 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:31,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 01:47:31,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861256884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-05 01:47:31,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-05 01:47:31,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-05 01:47:31,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602469156] [2021-07-05 01:47:31,918 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-05 01:47:31,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:47:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-05 01:47:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-05 01:47:31,920 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 01:47:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:47:31,942 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-07-05 01:47:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-05 01:47:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 18 [2021-07-05 01:47:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:47:31,945 INFO L225 Difference]: With dead ends: 43 [2021-07-05 01:47:31,945 INFO L226 Difference]: Without dead ends: 28 [2021-07-05 01:47:31,945 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-05 01:47:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-05 01:47:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-05 01:47:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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 01:47:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-07-05 01:47:31,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-07-05 01:47:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:47:31,954 INFO L442 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-07-05 01:47:31,954 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 01:47:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-07-05 01:47:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-05 01:47:31,955 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 01:47:31,955 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 01:47:31,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-07-05 01:47:32,172 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-05 01:47:32,172 INFO L374 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 01:47:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 01:47:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash 980561436, now seen corresponding path program 1 times [2021-07-05 01:47:32,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 01:47:32,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512789270] [2021-07-05 01:47:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 01:47:32,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 01:47:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 01:47:32,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:32,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:32,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:32,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-05 01:47:32,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:32,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-05 01:47:32,226 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-07-05 01:47:32,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:32,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 01:47:32,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 01:47:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-05 01:47:32,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 01:47:32,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512789270] [2021-07-05 01:47:32,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512789270] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 01:47:32,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 01:47:32,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-05 01:47:32,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313424592] [2021-07-05 01:47:32,229 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-05 01:47:32,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 01:47:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-05 01:47:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-05 01:47:32,230 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:47:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 01:47:32,241 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-07-05 01:47:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-05 01:47:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-05 01:47:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 01:47:32,242 INFO L225 Difference]: With dead ends: 34 [2021-07-05 01:47:32,242 INFO L226 Difference]: Without dead ends: 0 [2021-07-05 01:47:32,243 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-05 01:47:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-05 01:47:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-05 01:47:32,243 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 01:47:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-05 01:47:32,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-07-05 01:47:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 01:47:32,244 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-05 01:47:32,244 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-05 01:47:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-05 01:47:32,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-05 01:47:32,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-05 01:47:32,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-05 01:47:32,272 INFO L762 garLoopResultBuilder]: For program point L589(lines 589 591) no Hoare annotation was computed. [2021-07-05 01:47:32,272 INFO L762 garLoopResultBuilder]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2021-07-05 01:47:32,272 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-05 01:47:32,273 INFO L765 garLoopResultBuilder]: At program point L573(line 573) the Hoare annotation is: true [2021-07-05 01:47:32,273 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-05 01:47:32,273 INFO L758 garLoopResultBuilder]: At program point L615(lines 610 616) the Hoare annotation is: false [2021-07-05 01:47:32,273 INFO L762 garLoopResultBuilder]: For program point L633-2(lines 633 638) no Hoare annotation was computed. [2021-07-05 01:47:32,273 INFO L758 garLoopResultBuilder]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 (+ ULTIMATE.start_main_~i~0 1))) [2021-07-05 01:47:32,273 INFO L762 garLoopResultBuilder]: For program point L633-4(lines 633 638) no Hoare annotation was computed. [2021-07-05 01:47:32,273 INFO L762 garLoopResultBuilder]: For program point L617(lines 1 643) no Hoare annotation was computed. [2021-07-05 01:47:32,273 INFO L765 garLoopResultBuilder]: At program point L642(lines 624 643) the Hoare annotation is: true [2021-07-05 01:47:32,274 INFO L758 garLoopResultBuilder]: At program point L601(lines 585 602) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-07-05 01:47:32,274 INFO L758 garLoopResultBuilder]: At program point L618-2(lines 618 621) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-07-05 01:47:32,274 INFO L762 garLoopResultBuilder]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2021-07-05 01:47:32,274 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-05 01:47:32,274 INFO L762 garLoopResultBuilder]: For program point L635(lines 635 637) no Hoare annotation was computed. [2021-07-05 01:47:32,274 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 641) no Hoare annotation was computed. [2021-07-05 01:47:32,274 INFO L758 garLoopResultBuilder]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point L611-3(lines 611 614) no Hoare annotation was computed. [2021-07-05 01:47:32,275 INFO L758 garLoopResultBuilder]: At program point L636(lines 624 643) the Hoare annotation is: false [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point L603(lines 603 609) no Hoare annotation was computed. [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point L595(lines 595 597) no Hoare annotation was computed. [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point L595-2(lines 595 597) no Hoare annotation was computed. [2021-07-05 01:47:32,275 INFO L758 garLoopResultBuilder]: At program point L587-2(lines 587 600) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-07-05 01:47:32,275 INFO L762 garLoopResultBuilder]: For program point L587-3(lines 587 600) no Hoare annotation was computed. [2021-07-05 01:47:32,276 INFO L765 garLoopResultBuilder]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2021-07-05 01:47:32,276 INFO L758 garLoopResultBuilder]: At program point L629-2(lines 629 632) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2021-07-05 01:47:32,276 INFO L762 garLoopResultBuilder]: For program point L629-3(lines 629 632) no Hoare annotation was computed. [2021-07-05 01:47:32,276 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-05 01:47:32,276 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 01:47:32,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 01:47:32 BoogieIcfgContainer [2021-07-05 01:47:32,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 01:47:32,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 01:47:32,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 01:47:32,289 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 01:47:32,289 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 01:47:31" (3/4) ... [2021-07-05 01:47:32,291 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-05 01:47:32,302 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-07-05 01:47:32,302 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-07-05 01:47:32,302 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-05 01:47:32,302 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-05 01:47:32,324 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 01:47:32,324 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 01:47:32,325 INFO L168 Benchmark]: Toolchain (without parser) took 2041.53 ms. Allocated memory was 52.4 MB in the beginning and 79.7 MB in the end (delta: 27.3 MB). Free memory was 27.5 MB in the beginning and 57.2 MB in the end (delta: -29.7 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,325 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 01:47:32,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.91 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 27.3 MB in the beginning and 46.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 44.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,326 INFO L168 Benchmark]: Boogie Preprocessor took 16.54 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 43.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 01:47:32,326 INFO L168 Benchmark]: RCFGBuilder took 433.37 ms. Allocated memory is still 65.0 MB. Free memory was 43.0 MB in the beginning and 39.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,326 INFO L168 Benchmark]: TraceAbstraction took 1045.58 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 38.7 MB in the beginning and 31.0 MB in the end (delta: 7.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,326 INFO L168 Benchmark]: Witness Printer took 35.76 ms. Allocated memory is still 79.7 MB. Free memory was 31.0 MB in the beginning and 57.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 01:47:32,327 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 468.91 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 27.3 MB in the beginning and 46.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 44.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.54 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 43.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 433.37 ms. Allocated memory is still 65.0 MB. Free memory was 43.0 MB in the beginning and 39.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1045.58 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 38.7 MB in the beginning and 31.0 MB in the end (delta: 7.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * Witness Printer took 35.76 ms. Allocated memory is still 79.7 MB. Free memory was 31.0 MB in the beginning and 57.2 MB in the end (delta: -26.2 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 - PositiveResult [Line: 641]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 995.8ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 9.7ms, AutomataDifference: 101.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 25.3ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 98 SDtfs, 33 SDslu, 107 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 23 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 41 FormulaSimplificationTreeSizeReduction, 9.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 10.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 26.7ms SsaConstructionTime, 93.6ms SatisfiabilityAnalysisTime, 289.2ms InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 2 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/10 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 585]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 629]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 633]: Loop Invariant Derived loop invariant: 2 == len && len <= i + 1 - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-07-05 01:47:32,353 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...