./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.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_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af73c85b6bc44056cb1add2a2f8e6bd5309c70a2 .................................................................................................................................................................................................................................................................................................................................................... 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 03:16:29,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:16:29,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:16:29,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:16:29,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:16:29,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:16:29,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:16:29,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:16:29,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:16:29,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:16:30,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:16:30,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:16:30,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:16:30,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:16:30,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:16:30,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:16:30,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:16:30,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:16:30,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:16:30,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:16:30,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:16:30,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:16:30,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:16:30,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:16:30,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:16:30,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:16:30,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:16:30,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:16:30,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:16:30,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:16:30,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:16:30,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:16:30,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:16:30,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:16:30,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:16:30,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:16:30,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:16:30,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:16:30,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:16:30,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:16:30,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:16:30,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:16:30,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:16:30,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:16:30,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:16:30,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:16:30,099 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:16:30,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:16:30,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:16:30,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:16:30,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:16:30,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:16:30,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:16:30,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:16:30,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:16:30,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:16:30,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:16:30,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:16:30,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:16:30,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:16:30,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:16:30,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:16:30,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:16:30,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:16:30,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:16:30,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:16:30,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:16:30,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:16:30,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:16:30,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:16:30,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:16:30,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af73c85b6bc44056cb1add2a2f8e6bd5309c70a2 [2020-11-28 03:16:30,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:16:30,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:16:30,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:16:30,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:16:30,410 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:16:30,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2020-11-28 03:16:30,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/data/260a612cc/1d8196267f794033bafb709241503a91/FLAGeb5c3b1df [2020-11-28 03:16:31,087 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:16:31,088 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2020-11-28 03:16:31,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/data/260a612cc/1d8196267f794033bafb709241503a91/FLAGeb5c3b1df [2020-11-28 03:16:31,449 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/data/260a612cc/1d8196267f794033bafb709241503a91 [2020-11-28 03:16:31,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:16:31,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:16:31,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:16:31,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:16:31,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:16:31,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b5dc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31, skipping insertion in model container [2020-11-28 03:16:31,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:16:31,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:16:31,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:16:31,638 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:16:31,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:16:31,666 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:16:31,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31 WrapperNode [2020-11-28 03:16:31,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:16:31,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:16:31,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:16:31,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:16:31,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:16:31,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:16:31,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:16:31,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:16:31,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:16:31,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:16:31,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:16:31,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:16:31,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/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 03:16:31,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:16:31,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:16:31,799 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-28 03:16:31,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-28 03:16:31,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:16:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:16:32,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:16:32,166 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:16:32,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32 BoogieIcfgContainer [2020-11-28 03:16:32,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:16:32,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:16:32,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:16:32,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:16:32,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:16:31" (1/3) ... [2020-11-28 03:16:32,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7fe30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:32, skipping insertion in model container [2020-11-28 03:16:32,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31" (2/3) ... [2020-11-28 03:16:32,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7fe30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:32, skipping insertion in model container [2020-11-28 03:16:32,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32" (3/3) ... [2020-11-28 03:16:32,211 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-11-28 03:16:32,223 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:16:32,227 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:16:32,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:16:32,280 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:16:32,280 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:16:32,280 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:16:32,280 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:16:32,280 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:16:32,280 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:16:32,281 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:16:32,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:16:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-28 03:16:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:16:32,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:16:32,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:16:32,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:16:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:16:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-28 03:16:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:16:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382575272] [2020-11-28 03:16:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:16:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:32,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:16:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:32,559 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 03:16:32,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382575272] [2020-11-28 03:16:32,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:16:32,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:16:32,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323042316] [2020-11-28 03:16:32,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:16:32,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:16:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:16:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:16:32,590 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-28 03:16:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:16:32,721 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:16:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:16:32,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:16:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:16:32,742 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:16:32,743 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:16:32,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:16:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:16:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:16:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:16:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 03:16:32,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-28 03:16:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:16:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 03:16:32,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:16:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 03:16:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:16:32,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:16:32,797 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:16:32,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:16:32,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:16:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:16:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-28 03:16:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:16:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362539887] [2020-11-28 03:16:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:16:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:32,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:16:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:16:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:16:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362539887] [2020-11-28 03:16:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586714489] [2020-11-28 03:16:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/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 [2020-11-28 03:16:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:16:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:16:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:16:33,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:16:33,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-28 03:16:33,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934695549] [2020-11-28 03:16:33,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:16:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:16:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:16:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:16:33,242 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-28 03:16:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:16:33,374 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 03:16:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:16:33,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-28 03:16:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:16:33,377 INFO L225 Difference]: With dead ends: 22 [2020-11-28 03:16:33,377 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 03:16:33,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:16:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 03:16:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 03:16:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 03:16:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 03:16:33,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-28 03:16:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:16:33,384 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 03:16:33,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:16:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 03:16:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:16:33,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:16:33,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:16:33,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:16:33,611 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:16:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:16:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-28 03:16:33,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:16:33,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956925396] [2020-11-28 03:16:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:16:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:16:33,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:16:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:16:33,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:16:33,729 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:16:33,730 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:16:33,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:16:33,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:16:33 BoogieIcfgContainer [2020-11-28 03:16:33,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:16:33,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:16:33,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:16:33,781 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:16:33,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32" (3/4) ... [2020-11-28 03:16:33,784 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:16:33,848 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26bfd295-fae3-421d-9adc-2e9570ea6ab7/bin/uautomizer/witness.graphml [2020-11-28 03:16:33,849 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:16:33,850 INFO L168 Benchmark]: Toolchain (without parser) took 2396.38 ms. Allocated memory is still 92.3 MB. Free memory was 63.0 MB in the beginning and 45.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,851 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 75.5 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:16:33,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.28 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 53.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.00 ms. Allocated memory is still 92.3 MB. Free memory was 53.8 MB in the beginning and 52.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,852 INFO L168 Benchmark]: Boogie Preprocessor took 18.16 ms. Allocated memory is still 92.3 MB. Free memory was 52.4 MB in the beginning and 51.6 MB in the end (delta: 859.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:16:33,853 INFO L168 Benchmark]: RCFGBuilder took 450.14 ms. Allocated memory is still 92.3 MB. Free memory was 51.5 MB in the beginning and 40.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,854 INFO L168 Benchmark]: TraceAbstraction took 1578.32 ms. Allocated memory is still 92.3 MB. Free memory was 70.9 MB in the beginning and 48.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,854 INFO L168 Benchmark]: Witness Printer took 67.83 ms. Allocated memory is still 92.3 MB. Free memory was 48.0 MB in the beginning and 45.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 75.5 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 211.28 ms. Allocated memory is still 92.3 MB. Free memory was 62.9 MB in the beginning and 53.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.00 ms. Allocated memory is still 92.3 MB. Free memory was 53.8 MB in the beginning and 52.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.16 ms. Allocated memory is still 92.3 MB. Free memory was 52.4 MB in the beginning and 51.6 MB in the end (delta: 859.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 450.14 ms. Allocated memory is still 92.3 MB. Free memory was 51.5 MB in the beginning and 40.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1578.32 ms. Allocated memory is still 92.3 MB. Free memory was 70.9 MB in the beginning and 48.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. * Witness Printer took 67.83 ms. Allocated memory is still 92.3 MB. Free memory was 48.0 MB in the beginning and 45.4 MB in the end (delta: 2.5 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 2; [L15] int b = 3; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L3] __assert_fail("0", "sum_2x3-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 20 SDslu, 45 SDs, 0 SdLazy, 52 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1143 SizeOfPredicates, 3 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...