./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2f1e635c5c806286d01eb0b8ff07448b8253a7a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:17:29,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:17:29,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:17:29,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:17:29,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:17:29,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:17:29,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:17:29,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:17:29,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:17:29,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:17:29,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:17:29,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:17:29,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:17:29,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:17:29,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:17:29,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:17:29,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:17:29,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:17:29,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:17:29,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:17:29,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:17:29,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:17:29,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:17:29,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:17:29,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:17:29,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:17:29,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:17:29,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:17:29,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:17:29,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:17:29,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:17:29,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:17:29,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:17:29,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:17:29,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:17:29,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:17:29,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:17:29,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:17:29,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:17:29,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:17:29,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:17:29,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 02:17:29,953 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:17:29,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:17:29,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:17:29,954 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:17:29,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:17:29,954 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:17:29,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:17:29,954 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:17:29,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:17:29,955 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:17:29,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:17:29,955 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:17:29,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:17:29,956 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:17:29,956 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:17:29,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:17:29,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:17:29,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:17:29,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:17:29,958 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:17:29,958 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:17:29,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:17:29,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:17:29,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:17:29,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:17:29,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:17:29,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:17:29,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:17:29,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:17:29,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:17:29,960 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:17:29,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:17:29,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:17:29,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:17:29,961 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan 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 ! overflow) ) 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 -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2019-11-26 02:17:30,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:17:30,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:17:30,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:17:30,117 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:17:30,118 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:17:30,119 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-26 02:17:30,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/data/d98d916c4/5f8c4e5565a6436db1831832c40fa9df/FLAG933164885 [2019-11-26 02:17:30,574 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:17:30,575 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-26 02:17:30,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/data/d98d916c4/5f8c4e5565a6436db1831832c40fa9df/FLAG933164885 [2019-11-26 02:17:30,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/data/d98d916c4/5f8c4e5565a6436db1831832c40fa9df [2019-11-26 02:17:30,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:17:30,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:17:30,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:30,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:17:30,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:17:30,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69519b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30, skipping insertion in model container [2019-11-26 02:17:30,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:17:30,635 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:17:30,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:30,801 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:17:30,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:30,897 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:17:30,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30 WrapperNode [2019-11-26 02:17:30,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:30,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:30,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:17:30,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:17:30,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:30,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:17:30,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:17:30,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:17:30,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... [2019-11-26 02:17:30,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:17:30,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:17:30,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:17:30,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:17:30,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/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 [2019-11-26 02:17:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:17:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:17:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-26 02:17:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-26 02:17:31,229 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:17:31,229 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:17:31,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:31 BoogieIcfgContainer [2019-11-26 02:17:31,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:17:31,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:17:31,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:17:31,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:17:31,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:17:30" (1/3) ... [2019-11-26 02:17:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79de19bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:31, skipping insertion in model container [2019-11-26 02:17:31,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:30" (2/3) ... [2019-11-26 02:17:31,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79de19bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:31, skipping insertion in model container [2019-11-26 02:17:31,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:31" (3/3) ... [2019-11-26 02:17:31,244 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2019-11-26 02:17:31,261 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:17:31,267 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-26 02:17:31,286 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-26 02:17:31,327 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:17:31,327 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:17:31,327 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:17:31,327 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:17:31,328 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:17:31,328 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:17:31,328 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:17:31,328 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:17:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-26 02:17:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:17:31,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:31,348 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:31,349 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1481027418, now seen corresponding path program 1 times [2019-11-26 02:17:31,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:31,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082494256] [2019-11-26 02:17:31,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:31,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082494256] [2019-11-26 02:17:31,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:31,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:31,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729606390] [2019-11-26 02:17:31,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:31,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:31,538 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2019-11-26 02:17:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:31,705 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-11-26 02:17:31,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:31,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:17:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:31,718 INFO L225 Difference]: With dead ends: 65 [2019-11-26 02:17:31,718 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:17:31,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:17:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2019-11-26 02:17:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:17:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2019-11-26 02:17:31,775 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 7 [2019-11-26 02:17:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:31,775 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2019-11-26 02:17:31,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2019-11-26 02:17:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:17:31,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:31,776 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:31,777 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1332795356, now seen corresponding path program 1 times [2019-11-26 02:17:31,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:31,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361777164] [2019-11-26 02:17:31,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:31,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361777164] [2019-11-26 02:17:31,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:31,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:31,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833538149] [2019-11-26 02:17:31,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:31,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:31,816 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 5 states. [2019-11-26 02:17:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:31,881 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-11-26 02:17:31,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:17:31,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:17:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:31,883 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:17:31,883 INFO L226 Difference]: Without dead ends: 48 [2019-11-26 02:17:31,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-26 02:17:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-26 02:17:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-26 02:17:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2019-11-26 02:17:31,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 8 [2019-11-26 02:17:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:31,895 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2019-11-26 02:17:31,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2019-11-26 02:17:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:17:31,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:31,896 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:31,896 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1332790359, now seen corresponding path program 1 times [2019-11-26 02:17:31,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:31,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361544634] [2019-11-26 02:17:31,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:31,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361544634] [2019-11-26 02:17:31,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:31,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:31,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479767630] [2019-11-26 02:17:31,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:31,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:31,969 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 5 states. [2019-11-26 02:17:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:32,064 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2019-11-26 02:17:32,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:32,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:17:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:32,066 INFO L225 Difference]: With dead ends: 75 [2019-11-26 02:17:32,067 INFO L226 Difference]: Without dead ends: 73 [2019-11-26 02:17:32,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-26 02:17:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-11-26 02:17:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-26 02:17:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-11-26 02:17:32,089 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 8 [2019-11-26 02:17:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:32,089 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-11-26 02:17:32,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-11-26 02:17:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:17:32,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:32,091 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:32,091 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1633016855, now seen corresponding path program 1 times [2019-11-26 02:17:32,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:32,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029102213] [2019-11-26 02:17:32,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:32,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029102213] [2019-11-26 02:17:32,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:32,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460487529] [2019-11-26 02:17:32,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:32,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:32,164 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 5 states. [2019-11-26 02:17:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:32,240 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2019-11-26 02:17:32,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:32,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:17:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:32,242 INFO L225 Difference]: With dead ends: 115 [2019-11-26 02:17:32,242 INFO L226 Difference]: Without dead ends: 107 [2019-11-26 02:17:32,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-26 02:17:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2019-11-26 02:17:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-26 02:17:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2019-11-26 02:17:32,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 9 [2019-11-26 02:17:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:32,262 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2019-11-26 02:17:32,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2019-11-26 02:17:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:17:32,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:32,263 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:32,264 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1341101972, now seen corresponding path program 1 times [2019-11-26 02:17:32,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:32,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705733404] [2019-11-26 02:17:32,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:32,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705733404] [2019-11-26 02:17:32,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:32,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:32,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248570985] [2019-11-26 02:17:32,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:17:32,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:32,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:17:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:17:32,306 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand 4 states. [2019-11-26 02:17:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:32,369 INFO L93 Difference]: Finished difference Result 167 states and 220 transitions. [2019-11-26 02:17:32,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:17:32,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-26 02:17:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:32,371 INFO L225 Difference]: With dead ends: 167 [2019-11-26 02:17:32,371 INFO L226 Difference]: Without dead ends: 96 [2019-11-26 02:17:32,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-26 02:17:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-26 02:17:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-26 02:17:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2019-11-26 02:17:32,387 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 15 [2019-11-26 02:17:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:32,388 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2019-11-26 02:17:32,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:17:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2019-11-26 02:17:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:17:32,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:32,389 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:32,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1341095021, now seen corresponding path program 1 times [2019-11-26 02:17:32,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:32,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584125782] [2019-11-26 02:17:32,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:32,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584125782] [2019-11-26 02:17:32,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672606052] [2019-11-26 02:17:32,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a08d4511-123f-4ee8-8b99-472e9a2d6565/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:32,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:17:32,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:17:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:32,498 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:17:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:17:32,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38160167] [2019-11-26 02:17:32,598 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-26 02:17:32,598 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:17:32,603 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:17:32,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:17:32,806 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:17:32,811 INFO L168 Benchmark]: Toolchain (without parser) took 2207.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 944.8 MB in the beginning and 985.4 MB in the end (delta: -40.6 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:32,812 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:32,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:32,813 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:32,813 INFO L168 Benchmark]: Boogie Preprocessor took 15.41 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:32,814 INFO L168 Benchmark]: RCFGBuilder took 288.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:32,814 INFO L168 Benchmark]: TraceAbstraction took 1577.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.4 MB in the end (delta: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:32,817 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 293.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.41 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 288.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1577.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.4 MB in the end (delta: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...