./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22bfff7e0bc9ff374f4201c2281f2aec36cb181e ....................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:38:26,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:26,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:26,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:26,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:26,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:26,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:26,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:26,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:26,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:26,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:26,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:26,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:26,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:26,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:26,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:26,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:26,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:26,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:26,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:26,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:26,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:26,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:26,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:26,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:26,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:26,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:26,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:26,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:26,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:26,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:26,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:26,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:26,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:26,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:26,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:26,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:26,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:26,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:26,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:26,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:26,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:38:26,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:26,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:26,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:26,352 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:26,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:26,353 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:26,353 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:38:26,353 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:26,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:26,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:38:26,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:38:26,355 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:26,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:38:26,356 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:38:26,356 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:38:26,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:26,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:26,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:26,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:26,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:26,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:38:26,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:26,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:38:26,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:26,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:26,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:38:26,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:26,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:38:26,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:26,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:26,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:26,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:26,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:26,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:26,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:38:26,363 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:38:26,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:38:26,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:38:26,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:26,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:26,364 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_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22bfff7e0bc9ff374f4201c2281f2aec36cb181e [2020-11-28 07:38:26,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:26,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:26,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:26,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:26,653 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:26,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2020-11-28 07:38:26,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/data/5442ecffa/d19c8f08f6a44517b628b7d78fc4148b/FLAGbeb52f0d1 [2020-11-28 07:38:27,230 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:27,230 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2020-11-28 07:38:27,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/data/5442ecffa/d19c8f08f6a44517b628b7d78fc4148b/FLAGbeb52f0d1 [2020-11-28 07:38:27,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/data/5442ecffa/d19c8f08f6a44517b628b7d78fc4148b [2020-11-28 07:38:27,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:27,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:27,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:27,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:27,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:27,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd19f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27, skipping insertion in model container [2020-11-28 07:38:27,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:27,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:27,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:27,850 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:27,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:27,884 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:27,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27 WrapperNode [2020-11-28 07:38:27,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:27,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:27,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:27,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:27,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:27,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:27,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:27,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:27,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... [2020-11-28 07:38:27,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:27,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:27,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:27,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:27,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/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 07:38:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-28 07:38:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-28 07:38:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:28,024 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-28 07:38:28,024 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-28 07:38:28,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:28,446 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:38:28,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:28 BoogieIcfgContainer [2020-11-28 07:38:28,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:28,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:28,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:28,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:28,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:27" (1/3) ... [2020-11-28 07:38:28,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51ffea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:28, skipping insertion in model container [2020-11-28 07:38:28,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:27" (2/3) ... [2020-11-28 07:38:28,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c51ffea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:28, skipping insertion in model container [2020-11-28 07:38:28,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:28" (3/3) ... [2020-11-28 07:38:28,457 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-11-28 07:38:28,468 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:28,473 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:38:28,485 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:38:28,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:28,511 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:38:28,511 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:28,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:28,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:28,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:28,512 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:28,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-28 07:38:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:38:28,532 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:28,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:28,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash 158551182, now seen corresponding path program 1 times [2020-11-28 07:38:28,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:28,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428500344] [2020-11-28 07:38:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:28,813 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 07:38:28,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428500344] [2020-11-28 07:38:28,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:28,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:38:28,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302731290] [2020-11-28 07:38:28,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:38:28,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:38:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:28,836 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-11-28 07:38:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:28,931 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-28 07:38:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:38:28,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:38:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:28,947 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:38:28,948 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:38:28,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:38:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 07:38:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:38:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 07:38:28,994 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-11-28 07:38:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:28,994 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 07:38:28,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:38:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 07:38:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:38:28,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:28,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:28,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:28,997 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1894085204, now seen corresponding path program 1 times [2020-11-28 07:38:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774801683] [2020-11-28 07:38:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:29,237 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 07:38:29,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774801683] [2020-11-28 07:38:29,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:29,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-28 07:38:29,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977494850] [2020-11-28 07:38:29,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:38:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:38:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:38:29,241 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-11-28 07:38:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:29,297 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-11-28 07:38:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:38:29,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 07:38:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:29,301 INFO L225 Difference]: With dead ends: 29 [2020-11-28 07:38:29,301 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:38:29,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:38:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:38:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-28 07:38:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:38:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-28 07:38:29,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-11-28 07:38:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:29,309 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-28 07:38:29,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:38:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-28 07:38:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:38:29,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:29,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:29,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:29,311 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1480520114, now seen corresponding path program 1 times [2020-11-28 07:38:29,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:29,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768793069] [2020-11-28 07:38:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:29,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:29,437 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:29,474 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:29,475 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:29,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:38:29,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:29 BoogieIcfgContainer [2020-11-28 07:38:29,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:29,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:29,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:29,541 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:29,541 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:28" (3/4) ... [2020-11-28 07:38:29,543 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:29,627 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d65faf3-fff1-49aa-8bc9-fe9acb0dac80/bin/utaipan/witness.graphml [2020-11-28 07:38:29,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:29,632 INFO L168 Benchmark]: Toolchain (without parser) took 2002.88 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 56.3 MB in the beginning and 52.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,633 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 39.9 MB in the beginning and 39.9 MB in the end (delta: 35.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:29,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.18 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 82.8 MB in the end (delta: -26.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.60 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:29,635 INFO L168 Benchmark]: Boogie Preprocessor took 20.14 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.7 MB in the end (delta: 922.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,635 INFO L168 Benchmark]: RCFGBuilder took 508.05 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 65.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,636 INFO L168 Benchmark]: TraceAbstraction took 1090.16 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 54.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,637 INFO L168 Benchmark]: Witness Printer took 89.67 ms. Allocated memory is still 104.9 MB. Free memory was 54.9 MB in the beginning and 52.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:29,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 39.9 MB in the beginning and 39.9 MB in the end (delta: 35.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.18 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 56.0 MB in the beginning and 82.8 MB in the end (delta: -26.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.60 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.14 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.7 MB in the end (delta: 922.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 508.05 ms. Allocated memory is still 104.9 MB. Free memory was 80.7 MB in the beginning and 65.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1090.16 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 54.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Witness Printer took 89.67 ms. Allocated memory is still 104.9 MB. Free memory was 54.9 MB in the beginning and 52.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) VAL [\old(x)=2] [L10] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L17] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L18] CALL, EXPR id(x-1) VAL [\old(x)=0] [L10] COND TRUE x==0 [L10] return 0; VAL [\old(x)=0, \result=0, x=0] [L18] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L11] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L25] RET, EXPR id(input) [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 [L4] __assert_fail("0", "id2_b3_o2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 2 SDslu, 148 SDs, 0 SdLazy, 29 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 800 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 proved your program to be incorrect! Received shutdown request...