./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/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 64bit --witnessprinter.graph.data.programhash 871be16186d4378aec884efd2352a47ca4eb57bc ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_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 02:42:21,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:42:21,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:42:21,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:42:21,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:42:21,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:42:21,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:42:21,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:42:21,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:42:21,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:42:21,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:42:21,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:42:21,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:42:21,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:42:21,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:42:21,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:42:21,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:42:21,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:42:21,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:42:21,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:42:21,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:42:21,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:42:21,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:42:21,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:42:21,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:42:21,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:42:21,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:42:21,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:42:21,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:42:21,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:42:21,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:42:21,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:42:21,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:42:21,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:42:21,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:42:21,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:42:21,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:42:21,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:42:21,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:42:21,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:42:21,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:42:21,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:42:21,856 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:42:21,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:42:21,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:42:21,857 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:42:21,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:42:21,858 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:42:21,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:42:21,858 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:42:21,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:42:21,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:42:21,859 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:42:21,859 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:42:21,859 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:42:21,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:42:21,860 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:42:21,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:42:21,861 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:42:21,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:42:21,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:42:21,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:42:21,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:42:21,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:42:21,862 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:42:21,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:42:21,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:42:21,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:42:21,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:42:21,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:42:21,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:42:21,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:42:21,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:42:21,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:42:21,864 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:42:21,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:42:21,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:42:21,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:42:21,865 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_36380ab3-9674-4e90-814a-152bd3afc7e2/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2019-11-26 02:42:21,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:42:22,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:42:22,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:42:22,015 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:42:22,016 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:42:22,016 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-11-26 02:42:22,073 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/data/1d9d3289a/96e2117b52504dc598a8ee1f4b4b30c3/FLAG178aaa076 [2019-11-26 02:42:22,431 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:42:22,432 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2019-11-26 02:42:22,437 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/data/1d9d3289a/96e2117b52504dc598a8ee1f4b4b30c3/FLAG178aaa076 [2019-11-26 02:42:22,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/bin/utaipan/data/1d9d3289a/96e2117b52504dc598a8ee1f4b4b30c3 [2019-11-26 02:42:22,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:42:22,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:42:22,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:42:22,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:42:22,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:42:22,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:42:22" (1/1) ... [2019-11-26 02:42:22,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3842dbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:22, skipping insertion in model container [2019-11-26 02:42:22,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:42:22" (1/1) ... [2019-11-26 02:42:22,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:42:22,839 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:42:22,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:42:22,977 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:42:22,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:42:23,058 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:42:23,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23 WrapperNode [2019-11-26 02:42:23,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:42:23,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:42:23,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:42:23,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:42:23,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:42:23,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:42:23,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:42:23,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:42:23,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... [2019-11-26 02:42:23,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:42:23,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:42:23,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:42:23,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:42:23,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/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 02:42:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:42:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:42:23,169 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2019-11-26 02:42:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2019-11-26 02:42:23,442 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:42:23,442 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:42:23,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:42:23 BoogieIcfgContainer [2019-11-26 02:42:23,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:42:23,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:42:23,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:42:23,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:42:23,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:42:22" (1/3) ... [2019-11-26 02:42:23,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f3551c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:42:23, skipping insertion in model container [2019-11-26 02:42:23,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:42:23" (2/3) ... [2019-11-26 02:42:23,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f3551c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:42:23, skipping insertion in model container [2019-11-26 02:42:23,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:42:23" (3/3) ... [2019-11-26 02:42:23,450 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91_Recursion.c [2019-11-26 02:42:23,459 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:42:23,465 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-26 02:42:23,475 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-26 02:42:23,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:42:23,497 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:42:23,497 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:42:23,497 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:42:23,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:42:23,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:42:23,498 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:42:23,498 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:42:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-26 02:42:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:42:23,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:23,519 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:42:23,520 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash 30304495, now seen corresponding path program 1 times [2019-11-26 02:42:23,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:23,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47045151] [2019-11-26 02:42:23,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:23,682 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 02:42:23,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47045151] [2019-11-26 02:42:23,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:42:23,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:42:23,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315118094] [2019-11-26 02:42:23,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:42:23,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:42:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:42:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:42:23,700 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-11-26 02:42:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:42:23,828 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-26 02:42:23,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:42:23,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-11-26 02:42:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:42:23,838 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:42:23,839 INFO L226 Difference]: Without dead ends: 32 [2019-11-26 02:42:23,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 02:42:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-26 02:42:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-11-26 02:42:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-26 02:42:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-26 02:42:23,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2019-11-26 02:42:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:42:23,880 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-26 02:42:23,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:42:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-26 02:42:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:42:23,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:23,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:42:23,881 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 30304655, now seen corresponding path program 1 times [2019-11-26 02:42:23,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:23,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418879143] [2019-11-26 02:42:23,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:23,897 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 02:42:23,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418879143] [2019-11-26 02:42:23,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:42:23,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:42:23,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624035378] [2019-11-26 02:42:23,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:42:23,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:42:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:42:23,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:42:23,900 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2019-11-26 02:42:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:42:23,928 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2019-11-26 02:42:23,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:42:23,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-26 02:42:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:42:23,930 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:42:23,930 INFO L226 Difference]: Without dead ends: 28 [2019-11-26 02:42:23,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:42:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-26 02:42:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-26 02:42:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:42:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-26 02:42:23,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 5 [2019-11-26 02:42:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:42:23,939 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-26 02:42:23,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:42:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-26 02:42:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:42:23,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:23,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:42:23,941 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 939439389, now seen corresponding path program 1 times [2019-11-26 02:42:23,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:23,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792046502] [2019-11-26 02:42:23,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:23,959 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 02:42:23,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792046502] [2019-11-26 02:42:23,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:42:23,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:42:23,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115414512] [2019-11-26 02:42:23,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:42:23,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:42:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:42:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:42:23,962 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-11-26 02:42:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:42:23,983 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-11-26 02:42:23,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:42:23,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-26 02:42:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:42:23,986 INFO L225 Difference]: With dead ends: 28 [2019-11-26 02:42:23,986 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:42:23,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:42:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:42:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-26 02:42:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:42:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-26 02:42:23,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 6 [2019-11-26 02:42:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:42:23,993 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-26 02:42:23,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:42:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-26 02:42:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:42:23,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:23,994 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:42:23,995 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:23,995 INFO L82 PathProgramCache]: Analyzing trace with hash 939444354, now seen corresponding path program 1 times [2019-11-26 02:42:23,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:23,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970729393] [2019-11-26 02:42:23,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:24,050 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 02:42:24,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970729393] [2019-11-26 02:42:24,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:42:24,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:42:24,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639092848] [2019-11-26 02:42:24,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:42:24,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:42:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:42:24,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:42:24,052 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-11-26 02:42:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:42:24,231 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-11-26 02:42:24,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:42:24,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:42:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:42:24,233 INFO L225 Difference]: With dead ends: 39 [2019-11-26 02:42:24,233 INFO L226 Difference]: Without dead ends: 38 [2019-11-26 02:42:24,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 02:42:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-26 02:42:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-26 02:42:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-26 02:42:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-26 02:42:24,249 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2019-11-26 02:42:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:42:24,250 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-26 02:42:24,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:42:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-26 02:42:24,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:42:24,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:24,251 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:42:24,251 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:24,252 INFO L82 PathProgramCache]: Analyzing trace with hash 312291472, now seen corresponding path program 1 times [2019-11-26 02:42:24,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:24,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329601373] [2019-11-26 02:42:24,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:42:24,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329601373] [2019-11-26 02:42:24,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:42:24,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:42:24,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888098650] [2019-11-26 02:42:24,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:42:24,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:42:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:42:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:42:24,312 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2019-11-26 02:42:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:42:24,408 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-26 02:42:24,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:42:24,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-26 02:42:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:42:24,410 INFO L225 Difference]: With dead ends: 55 [2019-11-26 02:42:24,411 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:42:24,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:42:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:42:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-11-26 02:42:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-26 02:42:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-26 02:42:24,423 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2019-11-26 02:42:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:42:24,423 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-26 02:42:24,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:42:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-26 02:42:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:42:24,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:42:24,425 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:42:24,425 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:42:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:42:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash -904725729, now seen corresponding path program 1 times [2019-11-26 02:42:24,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:42:24,426 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067885535] [2019-11-26 02:42:24,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:42:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:42:24,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067885535] [2019-11-26 02:42:24,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353021063] [2019-11-26 02:42:24,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36380ab3-9674-4e90-814a-152bd3afc7e2/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 02:42:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:42:24,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:42:24,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:42:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:42:24,682 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:42:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:42:24,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934030138] [2019-11-26 02:42:24,929 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-26 02:42:24,929 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:42:24,935 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:42:25,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:42:25,138 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 02:42:25,143 INFO L168 Benchmark]: Toolchain (without parser) took 2330.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 994.4 MB in the end (delta: -44.3 MB). Peak memory consumption was 97.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:42:25,144 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:42:25,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:42:25,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.81 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 02:42:25,145 INFO L168 Benchmark]: Boogie Preprocessor took 14.52 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 02:42:25,146 INFO L168 Benchmark]: RCFGBuilder took 344.21 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:42:25,146 INFO L168 Benchmark]: TraceAbstraction took 1696.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 994.4 MB in the end (delta: 123.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:42:25,149 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 245.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.81 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 14.52 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 344.21 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1696.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 994.4 MB in the end (delta: 123.6 MB). Peak memory consumption was 123.6 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...