./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/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 8c9656c5ef8dceb7982043d8db455c38d2f23147 .................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/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: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:56:30,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:56:30,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:56:30,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:56:30,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:56:30,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:56:30,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:56:30,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:56:30,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:56:30,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:56:30,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:56:30,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:56:30,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:56:30,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:56:30,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:56:30,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:56:30,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:56:30,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:56:30,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:56:30,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:56:30,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:56:30,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:56:30,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:56:30,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:56:30,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:56:30,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:56:30,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:56:30,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:56:30,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:56:30,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:56:30,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:56:30,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:56:30,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:56:30,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:56:30,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:56:30,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:56:30,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:56:30,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:56:30,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:56:30,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:56:30,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:56:30,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 08:56:30,219 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:56:30,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:56:30,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:56:30,220 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:56:30,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:56:30,220 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:56:30,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:56:30,220 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:56:30,221 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:56:30,221 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:56:30,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:56:30,222 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:56:30,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:56:30,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:56:30,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:56:30,224 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9656c5ef8dceb7982043d8db455c38d2f23147 [2020-12-09 08:56:30,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:56:30,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:56:30,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:56:30,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:56:30,421 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:56:30,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-12-09 08:56:30,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/data/7de1d10d0/4509753287e44f4eb233b5468b3d2f0a/FLAGe9eb67475 [2020-12-09 08:56:30,830 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:56:30,831 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-12-09 08:56:30,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/data/7de1d10d0/4509753287e44f4eb233b5468b3d2f0a/FLAGe9eb67475 [2020-12-09 08:56:30,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/bin/utaipan/data/7de1d10d0/4509753287e44f4eb233b5468b3d2f0a [2020-12-09 08:56:30,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:56:30,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:56:30,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:56:30,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:56:30,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:56:30,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:30,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1325cf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30, skipping insertion in model container [2020-12-09 08:56:30,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:30,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:56:30,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:56:30,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:56:30,974 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:56:30,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:56:30,996 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:56:30,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30 WrapperNode [2020-12-09 08:56:30,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:56:30,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:56:30,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:56:30,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:56:31,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:56:31,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:56:31,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:56:31,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:56:31,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... [2020-12-09 08:56:31,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:56:31,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:56:31,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:56:31,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:56:31,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/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 [2020-12-09 08:56:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2020-12-09 08:56:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2020-12-09 08:56:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:56:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:56:31,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:56:31,216 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 08:56:31,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:31 BoogieIcfgContainer [2020-12-09 08:56:31,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:56:31,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:56:31,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:56:31,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:56:31,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:56:30" (1/3) ... [2020-12-09 08:56:31,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c38ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:56:31, skipping insertion in model container [2020-12-09 08:56:31,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:30" (2/3) ... [2020-12-09 08:56:31,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c38ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:56:31, skipping insertion in model container [2020-12-09 08:56:31,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:31" (3/3) ... [2020-12-09 08:56:31,223 INFO L111 eAbstractionObserver]: Analyzing ICFG TerminatorRec02.c [2020-12-09 08:56:31,233 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:56:31,235 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 08:56:31,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 08:56:31,258 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:56:31,258 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:56:31,258 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:56:31,258 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:56:31,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:56:31,259 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:56:31,259 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:56:31,259 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:56:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 08:56:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:56:31,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:56:31,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:56:31,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:56:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:56:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash 306322899, now seen corresponding path program 1 times [2020-12-09 08:56:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:56:31,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146837416] [2020-12-09 08:56:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:56:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:56:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:56:31,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146837416] [2020-12-09 08:56:31,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:56:31,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:56:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260034893] [2020-12-09 08:56:31,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:56:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:56:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:56:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:56:31,415 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-12-09 08:56:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:56:31,478 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 08:56:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:56:31,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 08:56:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:56:31,487 INFO L225 Difference]: With dead ends: 21 [2020-12-09 08:56:31,487 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 08:56:31,490 INFO L677 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 [2020-12-09 08:56:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 08:56:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 08:56:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 08:56:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-09 08:56:31,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2020-12-09 08:56:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:56:31,524 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-09 08:56:31,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:56:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-09 08:56:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:56:31,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:56:31,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:56:31,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:56:31,525 INFO L429 AbstractCegarLoop]: === Iteration 2 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:56:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:56:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash 906075314, now seen corresponding path program 1 times [2020-12-09 08:56:31,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:56:31,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947832099] [2020-12-09 08:56:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:56:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:56:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:56:31,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947832099] [2020-12-09 08:56:31,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:56:31,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:56:31,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928795045] [2020-12-09 08:56:31,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:56:31,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:56:31,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:56:31,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:56:31,555 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2020-12-09 08:56:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:56:31,572 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 08:56:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:56:31,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 08:56:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:56:31,574 INFO L225 Difference]: With dead ends: 19 [2020-12-09 08:56:31,575 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 08:56:31,576 INFO L677 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 [2020-12-09 08:56:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 08:56:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-12-09 08:56:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 08:56:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 08:56:31,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-12-09 08:56:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:56:31,581 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 08:56:31,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:56:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 08:56:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 08:56:31,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:56:31,583 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:56:31,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:56:31,583 INFO L429 AbstractCegarLoop]: === Iteration 3 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:56:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:56:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1137733808, now seen corresponding path program 1 times [2020-12-09 08:56:31,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:56:31,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033213794] [2020-12-09 08:56:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:56:31,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:56:31,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503355630] [2020-12-09 08:56:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12977f9c-aa35-45e8-be69-1b6d5964d576/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 [2020-12-09 08:56:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:56:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 08:56:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:56:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:56:31,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:56:31,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033213794] [2020-12-09 08:56:31,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:56:31,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503355630] [2020-12-09 08:56:31,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: cannot handle proper monomial [2020-12-09 08:56:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238995596] [2020-12-09 08:56:31,853 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 08:56:31,853 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:56:31,857 FATAL L? ?]: Ignoring 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:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 08:56:31,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:56:31,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 08:56:31,859 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 08:56:31,859 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:56:32,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 08:56:32,092 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 08:56:32,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:56:32 BoogieIcfgContainer [2020-12-09 08:56:32,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:56:32,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:56:32,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:56:32,096 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:56:32,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:31" (3/4) ... [2020-12-09 08:56:32,104 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:56:32,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:56:32,109 INFO L168 Benchmark]: Toolchain (without parser) took 1256.03 ms. Allocated memory is still 123.7 MB. Free memory was 85.7 MB in the beginning and 79.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,111 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 123.7 MB. Free memory was 102.0 MB in the beginning and 101.9 MB in the end (delta: 103.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.29 ms. Allocated memory is still 123.7 MB. Free memory was 85.5 MB in the beginning and 100.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 123.7 MB. Free memory was 100.3 MB in the beginning and 98.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:56:32,118 INFO L168 Benchmark]: Boogie Preprocessor took 11.42 ms. Allocated memory is still 123.7 MB. Free memory was 98.5 MB in the beginning and 98.1 MB in the end (delta: 381.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,120 INFO L168 Benchmark]: RCFGBuilder took 187.53 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 86.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,122 INFO L168 Benchmark]: TraceAbstraction took 875.20 ms. Allocated memory is still 123.7 MB. Free memory was 86.5 MB in the beginning and 79.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:32,123 INFO L168 Benchmark]: Witness Printer took 9.92 ms. Allocated memory is still 123.7 MB. Free memory is still 79.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:56:32,134 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 123.7 MB. Free memory was 102.0 MB in the beginning and 101.9 MB in the end (delta: 103.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 145.29 ms. Allocated memory is still 123.7 MB. Free memory was 85.5 MB in the beginning and 100.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 123.7 MB. Free memory was 100.3 MB in the beginning and 98.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.42 ms. Allocated memory is still 123.7 MB. Free memory was 98.5 MB in the beginning and 98.1 MB in the end (delta: 381.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 187.53 ms. Allocated memory is still 123.7 MB. Free memory was 97.6 MB in the beginning and 86.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 875.20 ms. Allocated memory is still 123.7 MB. Free memory was 86.5 MB in the beginning and 79.9 MB in the end (delta: 6.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Witness Printer took 9.92 ms. Allocated memory is still 123.7 MB. Free memory is still 79.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] int x = __VERIFIER_nondet_int(); [L27] COND FALSE !(x < 0) [L29] int y = __VERIFIER_nondet_int(); [L30] COND FALSE !(y < 0) [L32] int z = __VERIFIER_nondet_int(); [L33] CALL fact(x) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND FALSE !(x > 1) [L22] return 1; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] y * x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 33 SDslu, 20 SDs, 0 SdLazy, 41 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 185 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...