./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6f4e1dd3818e9d3e8c54653af66359ead501b84 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:25,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:25,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:25,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:25,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:25,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:25,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:25,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:25,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:25,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:25,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:25,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:25,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:25,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:25,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:25,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:25,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:25,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:25,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:25,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:25,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:25,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:25,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:25,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:25,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:25,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:25,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:25,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:25,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:25,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:25,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:25,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:25,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:25,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:25,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:25,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:25,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:25,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:25,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:25,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:25,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:25,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:25,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:25,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:25,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:25,972 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:25,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:25,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:25,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:25,973 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:25,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:25,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:25,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:25,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:25,983 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:25,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:25,983 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:25,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:25,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:25,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:25,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:25,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:25,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:25,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:25,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:25,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:25,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:25,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:25,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:25,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:25,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:25,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:25,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:25,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:25,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:25,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:25,992 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:25,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:25,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:25,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:25,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:25,993 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2021-10-11 02:23:26,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:26,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:26,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:26,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:26,363 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:26,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/recursive/gcd01-1.c [2021-10-11 02:23:26,435 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/data/285af4ca3/5a614aace97440a6abdfe850dc65db73/FLAG4424a1352 [2021-10-11 02:23:26,966 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:26,967 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/sv-benchmarks/c/recursive/gcd01-1.c [2021-10-11 02:23:26,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/data/285af4ca3/5a614aace97440a6abdfe850dc65db73/FLAG4424a1352 [2021-10-11 02:23:27,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/data/285af4ca3/5a614aace97440a6abdfe850dc65db73 [2021-10-11 02:23:27,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:27,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:27,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:27,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:27,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:27,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1840d5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27, skipping insertion in model container [2021-10-11 02:23:27,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:27,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:27,563 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-10-11 02:23:27,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:27,578 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:27,605 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-10-11 02:23:27,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:27,627 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:27,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27 WrapperNode [2021-10-11 02:23:27,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:27,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:27,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:27,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:27,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:27,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:27,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:27,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:27,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... [2021-10-11 02:23:27,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:27,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:27,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:27,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:27,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-10-11 02:23:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-10-11 02:23:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:27,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:28,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:28,107 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:23:28,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:28 BoogieIcfgContainer [2021-10-11 02:23:28,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:28,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:28,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:28,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:28,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:27" (1/3) ... [2021-10-11 02:23:28,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e84ae90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:28, skipping insertion in model container [2021-10-11 02:23:28,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:27" (2/3) ... [2021-10-11 02:23:28,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e84ae90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:28, skipping insertion in model container [2021-10-11 02:23:28,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:28" (3/3) ... [2021-10-11 02:23:28,127 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-10-11 02:23:28,149 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:28,153 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:28,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:28,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:28,194 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:28,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:28,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:28,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:28,195 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:28,195 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:28,195 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-10-11 02:23:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:23:28,219 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:28,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:28,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:28,227 INFO L82 PathProgramCache]: Analyzing trace with hash -672472283, now seen corresponding path program 1 times [2021-10-11 02:23:28,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:28,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504765756] [2021-10-11 02:23:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504765756] [2021-10-11 02:23:28,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:28,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:23:28,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340920510] [2021-10-11 02:23:28,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:28,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:28,502 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2021-10-11 02:23:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:28,641 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-10-11 02:23:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:28,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-10-11 02:23:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:28,663 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:23:28,663 INFO L226 Difference]: Without dead ends: 20 [2021-10-11 02:23:28,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-11 02:23:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-11 02:23:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:23:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-11 02:23:28,765 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-10-11 02:23:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:28,766 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-11 02:23:28,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-11 02:23:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:28,770 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:28,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:28,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:28,771 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:28,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1200358745, now seen corresponding path program 1 times [2021-10-11 02:23:28,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:28,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204000725] [2021-10-11 02:23:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:28,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204000725] [2021-10-11 02:23:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:28,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:23:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325615204] [2021-10-11 02:23:28,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:28,880 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2021-10-11 02:23:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:28,950 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-11 02:23:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:28,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 02:23:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:28,952 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:23:28,953 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:23:28,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:23:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-10-11 02:23:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:23:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-11 02:23:28,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-10-11 02:23:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:28,965 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-11 02:23:28,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-11 02:23:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:23:28,967 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:28,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:28,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:23:28,968 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash -229059489, now seen corresponding path program 1 times [2021-10-11 02:23:28,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:28,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696268470] [2021-10-11 02:23:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696268470] [2021-10-11 02:23:29,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:29,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:23:29,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600572199] [2021-10-11 02:23:29,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:29,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:29,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:29,181 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2021-10-11 02:23:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:29,315 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-10-11 02:23:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:29,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-10-11 02:23:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:29,318 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:23:29,318 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:23:29,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:23:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-10-11 02:23:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:23:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-11 02:23:29,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-10-11 02:23:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:29,333 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-11 02:23:29,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-11 02:23:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:23:29,335 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:29,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:29,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:23:29,335 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1574819235, now seen corresponding path program 1 times [2021-10-11 02:23:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:29,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328771234] [2021-10-11 02:23:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328771234] [2021-10-11 02:23:29,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:29,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:23:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48677624] [2021-10-11 02:23:29,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:29,519 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2021-10-11 02:23:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:29,662 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-10-11 02:23:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:29,663 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-10-11 02:23:29,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:29,665 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:23:29,665 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:23:29,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:23:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:23:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-10-11 02:23:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:23:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-11 02:23:29,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2021-10-11 02:23:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:29,675 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-11 02:23:29,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-11 02:23:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:23:29,676 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:29,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:29,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:23:29,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1175015767, now seen corresponding path program 1 times [2021-10-11 02:23:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:29,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319327844] [2021-10-11 02:23:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:23:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319327844] [2021-10-11 02:23:29,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:29,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:23:29,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678188988] [2021-10-11 02:23:29,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:29,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:29,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:29,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:29,758 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2021-10-11 02:23:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:29,814 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-10-11 02:23:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:29,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-10-11 02:23:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:29,816 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:23:29,816 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:23:29,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:23:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-10-11 02:23:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:23:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-11 02:23:29,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2021-10-11 02:23:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:29,825 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-11 02:23:29,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-11 02:23:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:23:29,826 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:29,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:29,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:23:29,827 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 63835465, now seen corresponding path program 1 times [2021-10-11 02:23:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:29,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051990929] [2021-10-11 02:23:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:23:29,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051990929] [2021-10-11 02:23:29,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:29,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:23:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887164319] [2021-10-11 02:23:29,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:29,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:29,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:29,903 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2021-10-11 02:23:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:29,973 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-10-11 02:23:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:29,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-10-11 02:23:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:29,979 INFO L225 Difference]: With dead ends: 30 [2021-10-11 02:23:29,979 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:23:29,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:23:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 02:23:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:23:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-11 02:23:30,006 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-10-11 02:23:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:30,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-11 02:23:30,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-11 02:23:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 02:23:30,013 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:30,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:30,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:23:30,014 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash 915558905, now seen corresponding path program 1 times [2021-10-11 02:23:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:30,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489500512] [2021-10-11 02:23:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:23:30,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489500512] [2021-10-11 02:23:30,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:30,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-11 02:23:30,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834504928] [2021-10-11 02:23:30,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:23:30,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:30,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:23:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:30,165 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 8 states. [2021-10-11 02:23:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:30,261 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-11 02:23:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:23:30,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-10-11 02:23:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:30,263 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:23:30,263 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:23:30,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:23:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:23:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:23:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:23:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:23:30,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-10-11 02:23:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:30,265 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:23:30,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:23:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:23:30,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:23:30,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:23:30,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:23:30,370 INFO L262 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2021-10-11 02:23:30,370 INFO L258 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= (+ gcd_~y1 1) gcd_~y2) (<= |gcd_#in~y2| gcd_~y2) (<= 1 gcd_~y1) (<= |gcd_#in~y1| gcd_~y1)) [2021-10-11 02:23:30,370 INFO L262 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2021-10-11 02:23:30,370 INFO L262 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-10-11 02:23:30,371 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (<= |gcd_#in~y2| gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2021-10-11 02:23:30,371 INFO L262 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2021-10-11 02:23:30,371 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-11 02:23:30,371 INFO L265 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-10-11 02:23:30,372 INFO L265 CegarLoopResult]: At program point L43(lines 30 45) the Hoare annotation is: true [2021-10-11 02:23:30,373 INFO L262 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2021-10-11 02:23:30,373 INFO L262 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2021-10-11 02:23:30,373 INFO L258 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start_main_~m~0)) [2021-10-11 02:23:30,373 INFO L262 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-10-11 02:23:30,373 INFO L262 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-10-11 02:23:30,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:30 BoogieIcfgContainer [2021-10-11 02:23:30,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:30,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:30,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:30,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:30,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:28" (3/4) ... [2021-10-11 02:23:30,390 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:23:30,397 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2021-10-11 02:23:30,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-11 02:23:30,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:23:30,406 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:23:30,406 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:23:30,461 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11388b8c-8240-4ba1-8c26-528abecd0fc5/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:30,461 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:30,468 INFO L168 Benchmark]: Toolchain (without parser) took 3149.02 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 51.0 MB in the beginning and 55.8 MB in the end (delta: -4.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,468 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:30,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.98 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.7 MB in the beginning and 80.1 MB in the end (delta: -29.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.24 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,473 INFO L168 Benchmark]: Boogie Preprocessor took 24.90 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 78.1 MB in the end (delta: 575.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:30,474 INFO L168 Benchmark]: RCFGBuilder took 415.88 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 63.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,474 INFO L168 Benchmark]: TraceAbstraction took 2266.48 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 58.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,475 INFO L168 Benchmark]: Witness Printer took 75.12 ms. Allocated memory is still 104.9 MB. Free memory was 58.1 MB in the beginning and 55.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:30,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 58.3 MB in the beginning and 58.3 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.98 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 50.7 MB in the beginning and 80.1 MB in the end (delta: -29.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.24 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 78.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.90 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 78.1 MB in the end (delta: 575.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 415.88 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 63.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2266.48 ms. Allocated memory is still 104.9 MB. Free memory was 62.5 MB in the beginning and 58.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Witness Printer took 75.12 ms. Allocated memory is still 104.9 MB. Free memory was 58.1 MB in the beginning and 55.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 92 SDslu, 347 SDs, 0 SdLazy, 287 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 39 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 5062 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...