./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c -s /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 676e29c704408ba5cb62ef3917e5c4d703cda2e4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 10:39:20,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:39:20,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:39:20,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:39:20,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:39:20,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:39:20,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:39:20,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:39:20,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:39:20,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:39:20,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:39:20,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:39:20,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:39:20,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:39:20,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:39:20,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:39:20,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:39:20,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:39:20,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:39:20,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:39:20,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:39:20,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:39:20,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:39:20,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:39:20,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:39:20,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:39:20,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:39:20,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:39:20,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:39:20,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:39:20,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:39:20,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:39:20,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:39:20,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:39:20,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:39:20,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:39:20,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:39:20,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:39:20,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:39:20,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:39:20,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:39:20,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 10:39:20,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:39:20,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:39:20,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:39:20,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:39:20,210 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:39:20,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:39:20,210 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:39:20,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:39:20,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:39:20,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:39:20,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 10:39:20,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:39:20,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 10:39:20,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:39:20,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 10:39:20,213 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:39:20,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 10:39:20,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:39:20,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:39:20,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:39:20,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:39:20,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:39:20,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:39:20,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:39:20,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 10:39:20,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 10:39:20,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 10:39:20,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 10:39:20,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_78e54b35-32e7-446f-91a9-8c383587d790/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(__VERIFIER_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 -> 676e29c704408ba5cb62ef3917e5c4d703cda2e4 [2019-11-20 10:39:20,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:39:20,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:39:20,398 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:39:20,400 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:39:20,400 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:39:20,401 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/../../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2019-11-20 10:39:20,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/data/a093503f1/36f729f948b64beeb836a2183bf2fea2/FLAG759e5a6af [2019-11-20 10:39:20,807 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:39:20,808 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2019-11-20 10:39:20,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/data/a093503f1/36f729f948b64beeb836a2183bf2fea2/FLAG759e5a6af [2019-11-20 10:39:21,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/data/a093503f1/36f729f948b64beeb836a2183bf2fea2 [2019-11-20 10:39:21,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:39:21,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 10:39:21,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:39:21,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:39:21,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:39:21,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28562db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21, skipping insertion in model container [2019-11-20 10:39:21,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,211 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:39:21,233 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:39:21,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:39:21,443 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:39:21,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:39:21,552 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:39:21,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21 WrapperNode [2019-11-20 10:39:21,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:39:21,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 10:39:21,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 10:39:21,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 10:39:21,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 10:39:21,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:39:21,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:39:21,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:39:21,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... [2019-11-20 10:39:21,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:39:21,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:39:21,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:39:21,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:39:21,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/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 [2019-11-20 10:39:21,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 10:39:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-20 10:39:21,690 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-20 10:39:21,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:39:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:39:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-20 10:39:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 10:39:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 10:39:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure plus [2019-11-20 10:39:21,692 INFO L138 BoogieDeclarations]: Found implementation of procedure plus [2019-11-20 10:39:21,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:39:21,895 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:39:21,895 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 10:39:21,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:39:21 BoogieIcfgContainer [2019-11-20 10:39:21,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:39:21,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:39:21,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:39:21,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:39:21,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:39:21" (1/3) ... [2019-11-20 10:39:21,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@beab950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:39:21, skipping insertion in model container [2019-11-20 10:39:21,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:39:21" (2/3) ... [2019-11-20 10:39:21,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@beab950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:39:21, skipping insertion in model container [2019-11-20 10:39:21,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:39:21" (3/3) ... [2019-11-20 10:39:21,903 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-recursive.c [2019-11-20 10:39:21,913 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:39:21,919 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 10:39:21,930 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 10:39:21,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:39:21,953 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 10:39:21,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:39:21,953 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:39:21,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:39:21,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:39:21,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:39:21,954 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:39:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-20 10:39:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-20 10:39:21,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:39:21,977 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:39:21,978 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:39:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:39:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash -694887038, now seen corresponding path program 1 times [2019-11-20 10:39:21,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:39:21,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738609673] [2019-11-20 10:39:21,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:39:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:39:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:22,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738609673] [2019-11-20 10:39:22,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:39:22,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 10:39:22,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204799121] [2019-11-20 10:39:22,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:39:22,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:39:22,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:39:22,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:39:22,233 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-20 10:39:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:39:22,327 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-11-20 10:39:22,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 10:39:22,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-20 10:39:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:39:22,335 INFO L225 Difference]: With dead ends: 33 [2019-11-20 10:39:22,335 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 10:39:22,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:39:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 10:39:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-20 10:39:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 10:39:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-20 10:39:22,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2019-11-20 10:39:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:39:22,367 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-20 10:39:22,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:39:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-20 10:39:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 10:39:22,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:39:22,368 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:39:22,369 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:39:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:39:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2070363059, now seen corresponding path program 1 times [2019-11-20 10:39:22,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:39:22,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265737056] [2019-11-20 10:39:22,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:39:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:39:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:22,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265737056] [2019-11-20 10:39:22,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402206043] [2019-11-20 10:39:22,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/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 [2019-11-20 10:39:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:39:22,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 10:39:22,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:39:22,687 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 10:39:22,691 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:22,695 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:22,696 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:22,696 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-20 10:39:22,723 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 10:39:22,723 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:22,728 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:22,728 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:22,729 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2019-11-20 10:39:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:22,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:39:22,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2019-11-20 10:39:22,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771155738] [2019-11-20 10:39:22,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 10:39:22,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:39:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 10:39:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-11-20 10:39:22,812 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2019-11-20 10:39:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:39:22,979 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-20 10:39:22,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 10:39:22,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2019-11-20 10:39:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:39:22,980 INFO L225 Difference]: With dead ends: 22 [2019-11-20 10:39:22,980 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 10:39:22,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-20 10:39:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 10:39:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-20 10:39:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-20 10:39:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-20 10:39:22,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2019-11-20 10:39:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:39:22,987 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-20 10:39:22,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 10:39:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-20 10:39:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 10:39:22,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:39:22,988 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 10:39:23,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:39:23,189 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:39:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:39:23,190 INFO L82 PathProgramCache]: Analyzing trace with hash -176397214, now seen corresponding path program 2 times [2019-11-20 10:39:23,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:39:23,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993174013] [2019-11-20 10:39:23,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:39:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:39:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:23,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993174013] [2019-11-20 10:39:23,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286129662] [2019-11-20 10:39:23,431 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:39:23,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:39:23,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:39:23,499 WARN L253 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-20 10:39:23,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:39:23,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 10:39:23,513 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,519 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:23,519 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,520 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 10:39:23,656 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:23,656 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2019-11-20 10:39:23,658 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,672 INFO L567 ElimStorePlain]: treesize reduction 11, result has 50.0 percent of original size [2019-11-20 10:39:23,672 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,672 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:11 [2019-11-20 10:39:23,818 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:23,819 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2019-11-20 10:39:23,820 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,837 INFO L567 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2019-11-20 10:39:23,837 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:23,838 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:11 [2019-11-20 10:39:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:23,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:39:23,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-11-20 10:39:23,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426459251] [2019-11-20 10:39:23,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 10:39:23,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:39:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 10:39:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2019-11-20 10:39:23,981 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 24 states. [2019-11-20 10:39:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:39:24,417 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-20 10:39:24,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 10:39:24,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 17 [2019-11-20 10:39:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:39:24,419 INFO L225 Difference]: With dead ends: 27 [2019-11-20 10:39:24,419 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 10:39:24,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2019-11-20 10:39:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 10:39:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-20 10:39:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 10:39:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-20 10:39:24,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2019-11-20 10:39:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:39:24,427 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-20 10:39:24,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 10:39:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-20 10:39:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 10:39:24,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:39:24,428 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2019-11-20 10:39:24,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:39:24,636 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 10:39:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:39:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash -978155155, now seen corresponding path program 3 times [2019-11-20 10:39:24,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 10:39:24,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962357541] [2019-11-20 10:39:24,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 10:39:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:39:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:39:24,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962357541] [2019-11-20 10:39:24,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746168354] [2019-11-20 10:39:24,934 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:39:24,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 10:39:24,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:39:24,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 10:39:24,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:39:25,100 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 10:39:25,101 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:25,107 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:25,107 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:25,108 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2019-11-20 10:39:25,177 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-20 10:39:25,177 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:39:25,186 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:39:25,186 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:39:25,186 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-11-20 10:39:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 10:39:25,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:39:25,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2019-11-20 10:39:25,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019781586] [2019-11-20 10:39:25,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 10:39:25,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 10:39:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 10:39:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2019-11-20 10:39:25,211 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 24 states. [2019-11-20 10:39:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:39:25,666 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 10:39:25,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 10:39:25,666 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-11-20 10:39:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:39:25,666 INFO L225 Difference]: With dead ends: 30 [2019-11-20 10:39:25,667 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 10:39:25,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 10:39:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 10:39:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 10:39:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 10:39:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 10:39:25,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-11-20 10:39:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:39:25,669 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 10:39:25,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 10:39:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 10:39:25,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 10:39:25,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:39:25,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 10:39:26,139 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-11-20 10:39:26,255 INFO L444 ceAbstractionStarter]: For program point fooEXIT(lines 9 18) no Hoare annotation was computed. [2019-11-20 10:39:26,256 INFO L440 ceAbstractionStarter]: At program point fooENTRY(lines 9 18) the Hoare annotation is: (let ((.cse3 (select |#memory_int| |foo_#in~p.base|))) (let ((.cse1 (select .cse3 |foo_#in~p.offset|)) (.cse0 (not (= 0 |foo_#in~p.offset|))) (.cse2 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or .cse0 (= .cse1 12) (not (= 12 .cse2))) (or .cse0 (= .cse1 10) (not (= 10 .cse2))) (or (<= .cse1 13) (not (<= .cse2 13))) (or (<= .cse1 20) (not (<= .cse2 20))) (or .cse0 (not (= 11 .cse2)) (= (select .cse3 0) 11))))) [2019-11-20 10:39:26,256 INFO L444 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-20 10:39:26,256 INFO L444 ceAbstractionStarter]: For program point fooErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-20 10:39:26,256 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 17) no Hoare annotation was computed. [2019-11-20 10:39:26,256 INFO L440 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (let ((.cse4 (select |#memory_int| |foo_#in~p.base|)) (.cse6 (select |#memory_int| foo_~p.base))) (let ((.cse0 (not (= 0 |foo_#in~p.offset|))) (.cse5 (= 0 foo_~p.offset)) (.cse1 (select .cse6 foo_~p.offset)) (.cse2 (select .cse4 |foo_#in~p.offset|)) (.cse3 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or .cse0 (and (<= .cse1 12) (<= .cse2 12)) (not (= 12 .cse3))) (or (not (<= .cse3 13)) (<= .cse2 13)) (or (and (<= .cse2 20) (<= .cse1 19)) (not (<= .cse3 20))) (or .cse0 (and (= (select .cse4 0) 11) .cse5 (= 11 (select .cse6 0))) (not (= 11 .cse3))) (or .cse0 (and .cse5 (= 10 .cse1) (= .cse2 10)) (not (= 10 .cse3)))))) [2019-11-20 10:39:26,256 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 17) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point L10-1(lines 9 18) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L440 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (= 0 ULTIMATE.start_main_~p~0.offset) (= (select (select |#memory_int| ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset) 10)) [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 26) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L444 ceAbstractionStarter]: For program point plusFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-20 10:39:26,257 INFO L440 ceAbstractionStarter]: At program point plusENTRY(lines 4 7) the Hoare annotation is: (let ((.cse3 (select |#memory_int| |plus_#in~p.base|)) (.cse5 (select |old(#memory_int)| |plus_#in~p.base|))) (let ((.cse1 (select .cse5 |plus_#in~p.offset|)) (.cse2 (not (= 0 |plus_#in~p.offset|))) (.cse0 (select .cse3 |plus_#in~p.offset|)) (.cse4 (select .cse5 0))) (and (or (<= .cse0 19) (not (<= .cse1 19))) (or (<= .cse0 12) (not (<= .cse1 12))) (or .cse2 (= 11 (select .cse3 0)) (not (= .cse4 11))) (or .cse2 (= 10 .cse0) (not (= .cse4 10)))))) [2019-11-20 10:39:26,258 INFO L444 ceAbstractionStarter]: For program point plusEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-20 10:39:26,258 INFO L440 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (let ((.cse6 (select |#memory_int| plus_~p.base)) (.cse8 (select |old(#memory_int)| |plus_#in~p.base|)) (.cse7 (select |#memory_int| |plus_#in~p.base|))) (let ((.cse0 (select .cse7 |plus_#in~p.offset|)) (.cse3 (not (= 0 |plus_#in~p.offset|))) (.cse4 (select .cse8 0)) (.cse1 (= 0 plus_~p.offset)) (.cse2 (select .cse6 plus_~p.offset)) (.cse5 (select .cse8 |plus_#in~p.offset|))) (and (or (and (<= .cse0 12) .cse1 (= .cse2 12)) .cse3 (not (= .cse4 11))) (or (not (<= .cse5 12)) (and (<= .cse2 13) (<= .cse0 19))) (or .cse3 (not (= .cse4 10)) (and (= (select .cse6 0) 11) (= 11 (select .cse7 0)) .cse1)) (or (<= .cse2 20) (not (<= .cse5 19)))))) [2019-11-20 10:39:26,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:39:26 BoogieIcfgContainer [2019-11-20 10:39:26,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:39:26,261 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:39:26,261 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:39:26,261 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:39:26,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:39:21" (3/4) ... [2019-11-20 10:39:26,265 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 10:39:26,271 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2019-11-20 10:39:26,272 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure plus [2019-11-20 10:39:26,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-20 10:39:26,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 10:39:26,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 10:39:26,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 10:39:26,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_78e54b35-32e7-446f-91a9-8c383587d790/bin/uautomizer/witness.graphml [2019-11-20 10:39:26,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:39:26,318 INFO L168 Benchmark]: Toolchain (without parser) took 5127.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 950.1 MB in the beginning and 987.1 MB in the end (delta: -37.0 MB). Peak memory consumption was 107.2 MB. Max. memory is 11.5 GB. [2019-11-20 10:39:26,319 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:39:26,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 10:39:26,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:39:26,320 INFO L168 Benchmark]: Boogie Preprocessor took 20.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:39:26,320 INFO L168 Benchmark]: RCFGBuilder took 283.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-11-20 10:39:26,321 INFO L168 Benchmark]: TraceAbstraction took 4363.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 993.9 MB in the end (delta: 121.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:39:26,321 INFO L168 Benchmark]: Witness Printer took 56.20 ms. Allocated memory is still 1.2 GB. Free memory was 993.9 MB in the beginning and 987.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 10:39:26,323 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 361.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -187.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 283.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4363.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 993.9 MB in the end (delta: 121.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 11.5 GB. * Witness Printer took 56.20 ms. Allocated memory is still 1.2 GB. Free memory was 993.9 MB in the beginning and 987.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 44 SDtfs, 14 SDslu, 154 SDs, 0 SdLazy, 432 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 411 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 201 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 109 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 9466 SizeOfPredicates, 44 NumberOfNonLiveVariables, 276 ConjunctsInSsa, 129 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...