./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex8.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/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 46300f8df490eeff7b37ea09f59b148489ff7bcb ................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:31:32,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:31:32,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:31:32,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:31:32,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:31:32,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:31:32,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:31:32,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:31:32,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:31:32,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:31:32,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:31:32,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:31:32,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:31:32,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:31:32,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:31:32,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:31:32,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:31:32,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:31:32,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:31:32,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:31:32,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:31:32,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:31:32,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:31:32,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:31:32,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:31:32,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:31:32,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:31:32,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:31:32,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:31:32,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:31:32,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:31:32,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:31:32,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:31:32,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:31:32,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:31:32,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:31:32,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:31:32,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:31:32,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:31:32,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:31:32,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:31:32,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:31:32,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:31:32,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:31:32,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:31:32,331 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:31:32,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:31:32,331 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:31:32,332 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:31:32,332 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:31:32,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:31:32,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:31:32,334 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:31:32,334 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:31:32,334 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:31:32,335 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:31:32,335 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:31:32,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:31:32,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:31:32,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:31:32,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:31:32,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:31:32,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:31:32,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:31:32,338 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:31:32,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:31:32,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:31:32,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:31:32,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:31:32,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:31:32,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:31:32,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:31:32,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:31:32,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:31:32,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:31:32,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:31:32,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:31:32,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:31:32,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:31:32,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:31:32,342 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_8c3591ac-beff-4868-8499-f137c108c2f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46300f8df490eeff7b37ea09f59b148489ff7bcb [2020-11-28 07:31:32,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:31:32,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:31:32,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:31:32,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:31:32,646 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:31:32,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex8.c [2020-11-28 07:31:32,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/data/176f76041/7b5e2b503b0a404388ed6e14884f9812/FLAG8d22bd0dc [2020-11-28 07:31:33,209 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:31:33,209 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex8.c [2020-11-28 07:31:33,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/data/176f76041/7b5e2b503b0a404388ed6e14884f9812/FLAG8d22bd0dc [2020-11-28 07:31:33,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/data/176f76041/7b5e2b503b0a404388ed6e14884f9812 [2020-11-28 07:31:33,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:31:33,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:31:33,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:31:33,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:31:33,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:31:33,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee4d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33, skipping insertion in model container [2020-11-28 07:31:33,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:31:33,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:31:33,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:31:33,796 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:31:33,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:31:33,862 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:31:33,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33 WrapperNode [2020-11-28 07:31:33,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:31:33,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:31:33,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:31:33,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:31:33,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:31:33,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:31:33,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:31:33,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:31:33,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... [2020-11-28 07:31:33,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:31:33,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:31:33,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:31:33,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:31:33,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/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 [2020-11-28 07:31:33,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:31:33,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:31:34,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:31:34,338 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-28 07:31:34,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:31:34 BoogieIcfgContainer [2020-11-28 07:31:34,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:31:34,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:31:34,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:31:34,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:31:34,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:31:33" (1/3) ... [2020-11-28 07:31:34,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e470c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:31:34, skipping insertion in model container [2020-11-28 07:31:34,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:31:33" (2/3) ... [2020-11-28 07:31:34,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e470c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:31:34, skipping insertion in model container [2020-11-28 07:31:34,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:31:34" (3/3) ... [2020-11-28 07:31:34,350 INFO L111 eAbstractionObserver]: Analyzing ICFG LeikeHeizmann-TACAS2014-Ex8.c [2020-11-28 07:31:34,361 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:31:34,370 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:31:34,380 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:31:34,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:31:34,402 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:31:34,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:31:34,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:31:34,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:31:34,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:31:34,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:31:34,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:31:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 07:31:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:31:34,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:31:34,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:31:34,421 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:31:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:31:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash 963403, now seen corresponding path program 1 times [2020-11-28 07:31:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:31:34,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999258178] [2020-11-28 07:31:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:31:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:31:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:31:34,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999258178] [2020-11-28 07:31:34,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:31:34,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:31:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455065921] [2020-11-28 07:31:34,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:31:34,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:31:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:31:34,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:31:34,587 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-11-28 07:31:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:31:34,656 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-28 07:31:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:31:34,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:31:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:31:34,666 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:31:34,666 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:31:34,668 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 [2020-11-28 07:31:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:31:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:31:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:31:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 07:31:34,700 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 4 [2020-11-28 07:31:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:31:34,700 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 07:31:34,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:31:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-11-28 07:31:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:31:34,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:31:34,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:31:34,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:31:34,702 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:31:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:31:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash 29865542, now seen corresponding path program 1 times [2020-11-28 07:31:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:31:34,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301357223] [2020-11-28 07:31:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:31:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:31:34,714 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:31:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:31:34,723 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:31:34,740 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:31:34,740 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:31:34,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:31:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:31:34 BoogieIcfgContainer [2020-11-28 07:31:34,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:31:34,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:31:34,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:31:34,757 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:31:34,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:31:34" (3/4) ... [2020-11-28 07:31:34,760 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:31:34,790 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8c3591ac-beff-4868-8499-f137c108c2f3/bin/utaipan/witness.graphml [2020-11-28 07:31:34,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:31:34,792 INFO L168 Benchmark]: Toolchain (without parser) took 1183.32 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.7 MB in the beginning and 66.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:34,793 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 49.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:34,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.41 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.5 MB in the beginning and 100.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:34,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.03 ms. Allocated memory is still 121.6 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:34,795 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 121.6 MB. Free memory was 99.1 MB in the beginning and 98.3 MB in the end (delta: 784.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:34,796 INFO L168 Benchmark]: RCFGBuilder took 423.26 ms. Allocated memory is still 121.6 MB. Free memory was 98.3 MB in the beginning and 88.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:34,797 INFO L168 Benchmark]: TraceAbstraction took 414.53 ms. Allocated memory is still 121.6 MB. Free memory was 87.8 MB in the beginning and 68.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:34,797 INFO L168 Benchmark]: Witness Printer took 33.60 ms. Allocated memory is still 121.6 MB. Free memory was 67.7 MB in the beginning and 66.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:34,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 49.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.41 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.5 MB in the beginning and 100.6 MB in the end (delta: -40.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.03 ms. Allocated memory is still 121.6 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 121.6 MB. Free memory was 99.1 MB in the beginning and 98.3 MB in the end (delta: 784.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 423.26 ms. Allocated memory is still 121.6 MB. Free memory was 98.3 MB in the beginning and 88.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 414.53 ms. Allocated memory is still 121.6 MB. Free memory was 87.8 MB in the beginning and 68.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 33.60 ms. Allocated memory is still 121.6 MB. Free memory was 67.7 MB in the beginning and 66.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: integer overflow possible integer overflow possible We found a FailurePath: [L14] int q, y; [L15] q = __VERIFIER_nondet_int() [L16] y = __VERIFIER_nondet_int() [L17] COND TRUE q > 0 [L18] COND FALSE !(y > 0) [L22] y - 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 8 SDslu, 2 SDs, 0 SdLazy, 5 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 proved your program to be incorrect! Received shutdown request...