./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f330f622534898bf170bbd5a7ac37bee3deb574 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:50:56,158 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:50:56,160 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:50:56,167 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:50:56,168 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:50:56,168 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:50:56,169 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:50:56,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:50:56,170 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:50:56,171 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:50:56,171 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:50:56,171 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:50:56,172 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:50:56,172 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:50:56,173 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:50:56,173 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:50:56,173 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:50:56,174 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:50:56,176 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:50:56,177 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:50:56,178 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:50:56,179 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:50:56,180 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:50:56,181 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:50:56,181 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:50:56,181 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:50:56,182 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:50:56,183 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:50:56,183 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:50:56,184 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:50:56,184 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:50:56,184 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:50:56,184 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:50:56,185 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:50:56,185 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:50:56,185 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:50:56,186 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:50:56,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:50:56,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:50:56,194 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:50:56,194 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:50:56,194 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:50:56,194 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:50:56,194 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:50:56,194 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:50:56,195 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:50:56,195 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:50:56,195 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:50:56,195 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:50:56,195 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:50:56,196 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:50:56,196 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:50:56,197 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:50:56,197 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:50:56,198 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:50:56,198 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:50:56,199 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:50:56,199 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:50:56,199 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f330f622534898bf170bbd5a7ac37bee3deb574 [2018-11-18 10:50:56,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:50:56,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:50:56,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:50:56,235 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:50:56,235 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:50:56,235 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:50:56,274 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/data/359c0a338/6f469b283a484947b51af077e690e1de/FLAG3670d9869 [2018-11-18 10:50:56,665 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:50:56,665 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/sv-benchmarks/c/recursive-simple/id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:50:56,669 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/data/359c0a338/6f469b283a484947b51af077e690e1de/FLAG3670d9869 [2018-11-18 10:50:56,678 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/data/359c0a338/6f469b283a484947b51af077e690e1de [2018-11-18 10:50:56,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:50:56,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:50:56,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:56,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:50:56,683 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:50:56,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf76dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56, skipping insertion in model container [2018-11-18 10:50:56,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:50:56,703 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:50:56,810 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:56,812 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:50:56,822 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:50:56,830 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:50:56,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56 WrapperNode [2018-11-18 10:50:56,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:50:56,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:50:56,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:50:56,831 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:50:56,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:50:56,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:50:56,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:50:56,844 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:50:56,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... [2018-11-18 10:50:56,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:50:56,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:50:56,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:50:56,855 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:50:56,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:50:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:50:56,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:50:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-11-18 10:50:56,926 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-11-18 10:50:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:50:56,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:50:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:50:56,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:50:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:50:56,927 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:50:57,041 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:50:57,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:57 BoogieIcfgContainer [2018-11-18 10:50:57,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:50:57,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:50:57,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:50:57,045 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:50:57,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:50:56" (1/3) ... [2018-11-18 10:50:57,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d322fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:57, skipping insertion in model container [2018-11-18 10:50:57,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:50:56" (2/3) ... [2018-11-18 10:50:57,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d322fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:50:57, skipping insertion in model container [2018-11-18 10:50:57,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:57" (3/3) ... [2018-11-18 10:50:57,048 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:50:57,056 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:50:57,062 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:50:57,075 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:50:57,102 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:50:57,102 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:50:57,102 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:50:57,102 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:50:57,102 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:50:57,102 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:50:57,102 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:50:57,103 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:50:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-11-18 10:50:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:50:57,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,123 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,125 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-11-18 10:50:57,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,174 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:57,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:57,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:57,309 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:57,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:57,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,327 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-11-18 10:50:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:57,361 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-11-18 10:50:57,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:57,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:50:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:57,368 INFO L225 Difference]: With dead ends: 40 [2018-11-18 10:50:57,368 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 10:50:57,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 10:50:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-18 10:50:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 10:50:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-11-18 10:50:57,398 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-11-18 10:50:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:57,399 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-11-18 10:50:57,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-11-18 10:50:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:50:57,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,401 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,401 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-11-18 10:50:57,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,402 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:57,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:57,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:57,491 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:57,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,493 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-11-18 10:50:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:57,506 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-18 10:50:57,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:57,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 10:50:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:57,507 INFO L225 Difference]: With dead ends: 44 [2018-11-18 10:50:57,507 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 10:50:57,508 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 10:50:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 10:50:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:50:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 10:50:57,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-18 10:50:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:57,512 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 10:50:57,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 10:50:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 10:50:57,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,513 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,513 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-11-18 10:50:57,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:50:57,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:57,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 10:50:57,623 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:57,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:50:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:50:57,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:50:57,624 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-11-18 10:50:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:57,669 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 10:50:57,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:50:57,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-18 10:50:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:57,670 INFO L225 Difference]: With dead ends: 36 [2018-11-18 10:50:57,670 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 10:50:57,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:50:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 10:50:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 10:50:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:50:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 10:50:57,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-11-18 10:50:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:57,674 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 10:50:57,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:50:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 10:50:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:50:57,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,675 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,675 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-11-18 10:50:57,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,676 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:50:57,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:57,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:57,757 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:57,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,758 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-11-18 10:50:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:57,774 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-11-18 10:50:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:57,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:50:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:57,775 INFO L225 Difference]: With dead ends: 48 [2018-11-18 10:50:57,775 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 10:50:57,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 10:50:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-18 10:50:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 10:50:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-18 10:50:57,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-18 10:50:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:57,780 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-18 10:50:57,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-18 10:50:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:50:57,780 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,780 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,781 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-11-18 10:50:57,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,782 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:50:57,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:50:57,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:50:57,832 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:57,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,833 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-11-18 10:50:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:57,840 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-11-18 10:50:57,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:57,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:50:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:57,841 INFO L225 Difference]: With dead ends: 40 [2018-11-18 10:50:57,841 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 10:50:57,842 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:50:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 10:50:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-11-18 10:50:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 10:50:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-11-18 10:50:57,845 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-11-18 10:50:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:57,845 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-11-18 10:50:57,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-11-18 10:50:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:50:57,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:50:57,846 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:50:57,846 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:50:57,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:57,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-11-18 10:50:57,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:50:57,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:57,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:50:57,848 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:50:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:50:58,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:58,007 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:50:58,007 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 10:50:58,009 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [11], [12], [16], [18], [21], [23], [29], [32], [33], [35], [39], [40], [41], [42], [43], [44], [45], [47], [48], [49], [50] [2018-11-18 10:50:58,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:50:58,039 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:50:58,190 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:50:58,191 INFO L272 AbstractInterpreter]: Visited 25 different actions 61 times. Merged at 10 different actions 16 times. Never widened. Performed 110 root evaluator evaluations with a maximum evaluation depth of 4. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-18 10:50:58,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:50:58,198 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:50:58,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:50:58,198 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:50:58,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:50:58,209 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:50:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:50:58,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:50:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:50:58,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:50:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:50:58,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:50:58,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 11] total 15 [2018-11-18 10:50:58,439 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:50:58,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:50:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:50:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:50:58,440 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-11-18 10:50:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:50:58,446 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-11-18 10:50:58,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:50:58,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-18 10:50:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:50:58,447 INFO L225 Difference]: With dead ends: 34 [2018-11-18 10:50:58,447 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:50:58,447 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:50:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:50:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:50:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:50:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:50:58,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-11-18 10:50:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:50:58,448 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:50:58,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:50:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:50:58,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:50:58,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:50:58,468 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:50:58,468 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:50:58,468 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-11-18 10:50:58,468 INFO L428 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2018-11-18 10:50:58,468 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L428 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:50:58,469 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-11-18 10:50:58,469 INFO L428 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2018-11-18 10:50:58,469 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L428 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L425 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-11-18 10:50:58,470 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2018-11-18 10:50:58,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:50:58 BoogieIcfgContainer [2018-11-18 10:50:58,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:50:58,473 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:50:58,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:50:58,473 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:50:58,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:50:57" (3/4) ... [2018-11-18 10:50:58,476 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:50:58,480 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:50:58,480 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2018-11-18 10:50:58,481 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:50:58,481 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 10:50:58,483 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:50:58,483 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:50:58,483 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:50:58,509 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a6d55552-6515-4a32-9de4-9f84e531f759/bin-2019/utaipan/witness.graphml [2018-11-18 10:50:58,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:50:58,510 INFO L168 Benchmark]: Toolchain (without parser) took 1829.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 959.3 MB in the beginning and 946.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 141.2 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,510 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:58,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.38 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:50:58,511 INFO L168 Benchmark]: Boogie Preprocessor took 11.22 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,512 INFO L168 Benchmark]: RCFGBuilder took 186.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,512 INFO L168 Benchmark]: TraceAbstraction took 1430.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.2 MB in the end (delta: 165.1 MB). Peak memory consumption was 165.1 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,512 INFO L168 Benchmark]: Witness Printer took 35.90 ms. Allocated memory is still 1.2 GB. Free memory was 949.2 MB in the beginning and 946.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:50:58,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.38 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.32 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.22 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 186.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1430.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 949.2 MB in the end (delta: 165.1 MB). Peak memory consumption was 165.1 MB. Max. memory is 11.5 GB. * Witness Printer took 35.90 ms. Allocated memory is still 1.2 GB. Free memory was 949.2 MB in the beginning and 946.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 5 procedures, 28 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 167 SDtfs, 8 SDslu, 549 SDs, 0 SdLazy, 70 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 11822 SizeOfPredicates, 3 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 16/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...