./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.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_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/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 a7af5709195f6c1eec73f2559f8e654af4840835 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/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 02:23:00,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:23:00,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:23:00,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:23:00,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:23:00,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:23:00,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:23:00,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:23:00,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:23:00,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:23:00,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:23:00,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:23:00,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:23:00,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:23:00,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:23:00,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:23:00,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:23:00,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:23:00,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:23:00,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:23:00,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:23:00,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:23:00,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:23:00,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:23:00,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:23:00,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:23:00,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:23:00,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:23:00,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:23:00,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:23:00,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:23:00,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:23:00,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:23:00,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:23:00,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:23:00,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:23:00,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:23:00,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:23:00,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:23:00,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:23:00,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:23:00,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:23:00,163 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:23:00,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:23:00,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:23:00,164 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:23:00,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:23:00,164 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:23:00,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:23:00,165 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:23:00,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:23:00,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:23:00,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:23:00,166 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:23:00,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:23:00,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:23:00,166 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:23:00,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:23:00,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:23:00,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:23:00,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:23:00,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:23:00,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:23:00,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:23:00,168 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:23:00,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:23:00,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:23:00,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:23:00,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:23:00,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:23:00,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:23:00,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:23:00,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:23:00,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:23:00,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:23:00,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:23:00,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:23:00,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:23:00,171 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_2deb5821-3d98-4b31-95aa-3b60c703a51b/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 -> a7af5709195f6c1eec73f2559f8e654af4840835 [2019-11-26 02:23:00,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:23:00,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:23:00,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:23:00,342 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:23:00,342 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:23:00,343 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2019-11-26 02:23:00,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/data/e3069ae0b/bc345b2177a74144a997f7bcc7dc07eb/FLAG138b54039 [2019-11-26 02:23:00,776 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:23:00,776 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2019-11-26 02:23:00,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/data/e3069ae0b/bc345b2177a74144a997f7bcc7dc07eb/FLAG138b54039 [2019-11-26 02:23:00,791 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/bin/utaipan/data/e3069ae0b/bc345b2177a74144a997f7bcc7dc07eb [2019-11-26 02:23:00,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:23:00,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:23:00,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:23:00,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:23:00,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:23:00,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:23:00" (1/1) ... [2019-11-26 02:23:00,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1572d458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:00, skipping insertion in model container [2019-11-26 02:23:00,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:23:00" (1/1) ... [2019-11-26 02:23:00,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:23:00,823 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:23:00,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:23:00,995 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:23:01,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:23:01,129 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:23:01,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01 WrapperNode [2019-11-26 02:23:01,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:23:01,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:23:01,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:23:01,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:23:01,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:23:01,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:23:01,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:23:01,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:23:01,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... [2019-11-26 02:23:01,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:23:01,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:23:01,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:23:01,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:23:01,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/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 02:23:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2019-11-26 02:23:01,230 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2019-11-26 02:23:01,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:23:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:23:01,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:23:01,439 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:23:01,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:23:01 BoogieIcfgContainer [2019-11-26 02:23:01,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:23:01,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:23:01,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:23:01,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:23:01,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:23:00" (1/3) ... [2019-11-26 02:23:01,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71de8be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:23:01, skipping insertion in model container [2019-11-26 02:23:01,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:23:01" (2/3) ... [2019-11-26 02:23:01,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71de8be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:23:01, skipping insertion in model container [2019-11-26 02:23:01,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:23:01" (3/3) ... [2019-11-26 02:23:01,453 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2019-11-26 02:23:01,474 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:23:01,481 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-26 02:23:01,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-26 02:23:01,526 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:23:01,526 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:23:01,526 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:23:01,526 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:23:01,527 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:23:01,527 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:23:01,527 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:23:01,527 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:23:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-26 02:23:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:23:01,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:01,558 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:01,559 INFO L410 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash 887577448, now seen corresponding path program 1 times [2019-11-26 02:23:01,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:01,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092832186] [2019-11-26 02:23:01,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:01,789 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 02:23:01,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092832186] [2019-11-26 02:23:01,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:23:01,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:23:01,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167591434] [2019-11-26 02:23:01,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:23:01,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:23:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:23:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:23:01,809 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2019-11-26 02:23:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:23:01,943 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2019-11-26 02:23:01,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:23:01,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:23:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:23:01,955 INFO L225 Difference]: With dead ends: 73 [2019-11-26 02:23:01,955 INFO L226 Difference]: Without dead ends: 42 [2019-11-26 02:23:01,959 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 02:23:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-26 02:23:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-11-26 02:23:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-26 02:23:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-26 02:23:01,999 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2019-11-26 02:23:01,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:23:01,999 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-26 02:23:02,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:23:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-26 02:23:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:23:02,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:02,000 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:02,001 INFO L410 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1745104164, now seen corresponding path program 1 times [2019-11-26 02:23:02,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:02,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570035852] [2019-11-26 02:23:02,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,055 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 02:23:02,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570035852] [2019-11-26 02:23:02,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:23:02,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:23:02,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264940812] [2019-11-26 02:23:02,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:23:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:23:02,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:23:02,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:23:02,059 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2019-11-26 02:23:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:23:02,183 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-11-26 02:23:02,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:23:02,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:23:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:23:02,185 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:23:02,186 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:23:02,187 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 02:23:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:23:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-11-26 02:23:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:23:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-11-26 02:23:02,197 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2019-11-26 02:23:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:23:02,197 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-11-26 02:23:02,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:23:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-11-26 02:23:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:23:02,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:02,199 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:02,199 INFO L410 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:02,199 INFO L82 PathProgramCache]: Analyzing trace with hash 80311672, now seen corresponding path program 1 times [2019-11-26 02:23:02,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:02,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083863928] [2019-11-26 02:23:02,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,266 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 02:23:02,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083863928] [2019-11-26 02:23:02,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:23:02,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:23:02,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528145020] [2019-11-26 02:23:02,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:23:02,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:23:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:23:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:23:02,268 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2019-11-26 02:23:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:23:02,359 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2019-11-26 02:23:02,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:23:02,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-26 02:23:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:23:02,361 INFO L225 Difference]: With dead ends: 106 [2019-11-26 02:23:02,361 INFO L226 Difference]: Without dead ends: 64 [2019-11-26 02:23:02,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:23:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-26 02:23:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-11-26 02:23:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-26 02:23:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-26 02:23:02,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 13 [2019-11-26 02:23:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:23:02,374 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-26 02:23:02,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:23:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-26 02:23:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:23:02,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:02,375 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:02,376 INFO L410 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1248859076, now seen corresponding path program 1 times [2019-11-26 02:23:02,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:02,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516834107] [2019-11-26 02:23:02,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,421 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 02:23:02,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516834107] [2019-11-26 02:23:02,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:23:02,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:23:02,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040376568] [2019-11-26 02:23:02,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:23:02,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:23:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:23:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:23:02,423 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 5 states. [2019-11-26 02:23:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:23:02,485 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2019-11-26 02:23:02,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:23:02,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-26 02:23:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:23:02,489 INFO L225 Difference]: With dead ends: 81 [2019-11-26 02:23:02,489 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:23:02,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 02:23:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:23:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-26 02:23:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:23:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-26 02:23:02,497 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-26 02:23:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:23:02,498 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-26 02:23:02,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:23:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-26 02:23:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:23:02,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:02,499 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:02,499 INFO L410 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash 59932744, now seen corresponding path program 1 times [2019-11-26 02:23:02,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:02,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659384884] [2019-11-26 02:23:02,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:23:02,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659384884] [2019-11-26 02:23:02,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:23:02,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:23:02,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107931852] [2019-11-26 02:23:02,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:23:02,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:23:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:23:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:23:02,549 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 5 states. [2019-11-26 02:23:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:23:02,595 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2019-11-26 02:23:02,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:23:02,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-26 02:23:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:23:02,597 INFO L225 Difference]: With dead ends: 57 [2019-11-26 02:23:02,597 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:23:02,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 02:23:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:23:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-11-26 02:23:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:23:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-26 02:23:02,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2019-11-26 02:23:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:23:02,606 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-26 02:23:02,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:23:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-26 02:23:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:23:02,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:23:02,607 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:23:02,607 INFO L410 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:23:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:23:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash -65083495, now seen corresponding path program 1 times [2019-11-26 02:23:02,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:23:02,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692949939] [2019-11-26 02:23:02,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:23:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,664 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 02:23:02,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692949939] [2019-11-26 02:23:02,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108780252] [2019-11-26 02:23:02,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2deb5821-3d98-4b31-95aa-3b60c703a51b/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 02:23:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:23:02,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:23:02,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:23:02,750 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 02:23:02,750 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:23:02,816 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 02:23:02,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520077487] [2019-11-26 02:23:02,839 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:23:02,839 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:23:02,845 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:23:03,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:23:03,049 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 02:23:03,053 INFO L168 Benchmark]: Toolchain (without parser) took 2258.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -55.6 MB). Peak memory consumption was 96.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:23:03,053 INFO L168 Benchmark]: CDTParser took 0.47 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 02:23:03,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:23:03,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.21 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 02:23:03,055 INFO L168 Benchmark]: Boogie Preprocessor took 16.70 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: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:23:03,055 INFO L168 Benchmark]: RCFGBuilder took 260.90 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:23:03,056 INFO L168 Benchmark]: TraceAbstraction took 1610.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 115.6 MB). Peak memory consumption was 115.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:23:03,059 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 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 335.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.21 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 16.70 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: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 260.90 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1610.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 115.6 MB). Peak memory consumption was 115.6 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...