./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/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 e655d34f6b59f7cc9a55d4dc4dc525a41685abad ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:20:51,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:20:51,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:20:51,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:20:51,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:20:51,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:20:51,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:20:51,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:20:51,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:20:51,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:20:51,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:20:51,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:20:51,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:20:51,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:20:51,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:20:51,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:20:51,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:20:51,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:20:51,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:20:51,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:20:51,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:20:51,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:20:51,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:20:51,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:20:51,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:20:51,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:20:51,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:20:51,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:20:51,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:20:51,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:20:51,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:20:51,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:20:51,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:20:51,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:20:51,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:20:51,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:20:51,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:20:51,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:20:51,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:20:51,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:20:51,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:20:51,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:20:51,986 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:20:51,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:20:51,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:20:51,987 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:20:51,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:20:51,988 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:20:51,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:20:51,988 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:20:51,989 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:20:51,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:20:51,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:20:51,989 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:20:51,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:20:51,990 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:20:51,990 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:20:51,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:20:51,991 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:20:51,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:20:51,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:20:51,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:20:51,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:20:51,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:20:51,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:20:51,992 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:20:51,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:20:51,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:20:51,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:20:51,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:20:51,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:20:51,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:20:51,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:20:51,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:20:51,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:20:51,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:20:51,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:20:51,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:20:51,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:20:51,995 INFO L138 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/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__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 -> e655d34f6b59f7cc9a55d4dc4dc525a41685abad [2019-11-26 02:20:52,155 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:20:52,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:20:52,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:20:52,174 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:20:52,174 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:20:52,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/../../sv-benchmarks/c/loops/string-1.i [2019-11-26 02:20:52,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/data/79a3f08a8/79bfb86d4b8547c68e048ee60d6f95e7/FLAGa071f9e05 [2019-11-26 02:20:52,592 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:20:52,593 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/sv-benchmarks/c/loops/string-1.i [2019-11-26 02:20:52,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/data/79a3f08a8/79bfb86d4b8547c68e048ee60d6f95e7/FLAGa071f9e05 [2019-11-26 02:20:52,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/data/79a3f08a8/79bfb86d4b8547c68e048ee60d6f95e7 [2019-11-26 02:20:52,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:20:52,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:20:52,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:20:52,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:20:52,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:20:52,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:20:52" (1/1) ... [2019-11-26 02:20:52,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620d79a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:52, skipping insertion in model container [2019-11-26 02:20:52,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:20:52" (1/1) ... [2019-11-26 02:20:52,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:20:53,016 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:20:53,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:20:53,172 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:20:53,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:20:53,301 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:20:53,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53 WrapperNode [2019-11-26 02:20:53,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:20:53,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:20:53,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:20:53,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:20:53,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:20:53,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:20:53,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:20:53,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:20:53,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... [2019-11-26 02:20:53,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:20:53,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:20:53,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:20:53,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:20:53,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:20:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:20:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:20:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:20:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:20:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:20:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:20:53,889 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:20:53,889 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-26 02:20:53,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:20:53 BoogieIcfgContainer [2019-11-26 02:20:53,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:20:53,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:20:53,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:20:53,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:20:53,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:20:52" (1/3) ... [2019-11-26 02:20:53,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa7c2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:20:53, skipping insertion in model container [2019-11-26 02:20:53,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:20:53" (2/3) ... [2019-11-26 02:20:53,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa7c2d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:20:53, skipping insertion in model container [2019-11-26 02:20:53,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:20:53" (3/3) ... [2019-11-26 02:20:53,897 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-11-26 02:20:53,904 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:20:53,909 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:20:53,916 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:20:53,934 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:20:53,934 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:20:53,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:20:53,935 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:20:53,935 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:20:53,935 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:20:53,935 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:20:53,935 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:20:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:20:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:20:53,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:53,951 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:53,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:20:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:53,956 INFO L82 PathProgramCache]: Analyzing trace with hash -731561975, now seen corresponding path program 1 times [2019-11-26 02:20:53,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:20:53,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305530820] [2019-11-26 02:20:53,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:20:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:54,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305530820] [2019-11-26 02:20:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:20:54,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:20:54,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489909876] [2019-11-26 02:20:54,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:20:54,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:20:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:20:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:20:54,116 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-26 02:20:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:54,175 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-26 02:20:54,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:20:54,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-26 02:20:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:54,185 INFO L225 Difference]: With dead ends: 43 [2019-11-26 02:20:54,185 INFO L226 Difference]: Without dead ends: 21 [2019-11-26 02:20:54,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:20:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-26 02:20:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-26 02:20:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:20:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-26 02:20:54,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2019-11-26 02:20:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:54,220 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-26 02:20:54,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:20:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-26 02:20:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:20:54,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:54,220 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:54,221 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:20:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1445692596, now seen corresponding path program 1 times [2019-11-26 02:20:54,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:20:54,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193501466] [2019-11-26 02:20:54,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:20:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:20:54,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193501466] [2019-11-26 02:20:54,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790430944] [2019-11-26 02:20:54,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/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 [2019-11-26 02:20:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:54,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:20:54,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:20:54,410 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:20:54,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161519541] [2019-11-26 02:20:54,457 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:20:54,457 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:20:54,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:20:54,467 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:20:54,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:20:55,182 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:20:55,602 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2019-11-26 02:20:56,003 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-11-26 02:20:56,141 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-11-26 02:20:56,411 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-11-26 02:20:56,578 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2019-11-26 02:20:56,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:20:56,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2019-11-26 02:20:56,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323850575] [2019-11-26 02:20:56,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:20:56,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:20:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:20:56,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:20:56,584 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 13 states. [2019-11-26 02:20:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:56,777 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-11-26 02:20:56,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:20:56,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-26 02:20:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:56,779 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:20:56,779 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:20:56,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:20:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:20:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2019-11-26 02:20:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:20:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-26 02:20:56,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2019-11-26 02:20:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:56,786 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-26 02:20:56,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:20:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-26 02:20:56,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:20:56,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:56,787 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:56,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:56,988 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:20:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash -681055375, now seen corresponding path program 1 times [2019-11-26 02:20:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:20:56,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71467709] [2019-11-26 02:20:56,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:20:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:57,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71467709] [2019-11-26 02:20:57,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706430599] [2019-11-26 02:20:57,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/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 [2019-11-26 02:20:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:57,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:20:57,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:57,105 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:57,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682677874] [2019-11-26 02:20:57,122 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:20:57,122 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:20:57,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:20:57,123 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:20:57,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:20:57,619 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:20:58,334 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-11-26 02:20:58,664 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-11-26 02:20:58,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:20:58,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2019-11-26 02:20:58,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504297976] [2019-11-26 02:20:58,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:20:58,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:20:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:20:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:20:58,667 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 12 states. [2019-11-26 02:20:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:58,958 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-26 02:20:58,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:20:58,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-11-26 02:20:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:58,960 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:20:58,960 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:20:58,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:20:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:20:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-26 02:20:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-26 02:20:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-26 02:20:58,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2019-11-26 02:20:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:58,965 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-26 02:20:58,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:20:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-26 02:20:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:20:58,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:58,970 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:59,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:59,171 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:20:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash 31959175, now seen corresponding path program 1 times [2019-11-26 02:20:59,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:20:59,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166606991] [2019-11-26 02:20:59,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:20:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:59,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166606991] [2019-11-26 02:20:59,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459561345] [2019-11-26 02:20:59,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/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 [2019-11-26 02:20:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:59,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:20:59,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:59,261 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:59,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180354940] [2019-11-26 02:20:59,276 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:20:59,277 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:20:59,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:20:59,277 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:20:59,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:20:59,706 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:21:00,630 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2019-11-26 02:21:00,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:21:00,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2019-11-26 02:21:00,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520424704] [2019-11-26 02:21:00,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:21:00,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:21:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:21:00,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:21:00,633 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 13 states. [2019-11-26 02:21:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:00,779 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2019-11-26 02:21:00,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:21:00,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-11-26 02:21:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:00,780 INFO L225 Difference]: With dead ends: 29 [2019-11-26 02:21:00,781 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 02:21:00,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:21:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 02:21:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-26 02:21:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-26 02:21:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-26 02:21:00,785 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-11-26 02:21:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:00,785 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-26 02:21:00,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:21:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-26 02:21:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-26 02:21:00,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:00,786 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:00,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:21:00,987 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:21:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2003088876, now seen corresponding path program 1 times [2019-11-26 02:21:00,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:21:00,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000362620] [2019-11-26 02:21:00,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:21:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:21:01,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000362620] [2019-11-26 02:21:01,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365277693] [2019-11-26 02:21:01,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:21:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:01,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:21:01,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:21:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:21:01,096 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:21:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:21:01,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151090435] [2019-11-26 02:21:01,111 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:21:01,111 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:21:01,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:21:01,112 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:21:01,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:21:01,534 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:21:02,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:21:02,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2019-11-26 02:21:02,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615651306] [2019-11-26 02:21:02,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:21:02,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:21:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:21:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:21:02,217 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 12 states. [2019-11-26 02:21:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:02,418 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-26 02:21:02,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:21:02,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-26 02:21:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:02,419 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:21:02,419 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:21:02,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:21:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:21:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-26 02:21:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:21:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-26 02:21:02,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2019-11-26 02:21:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:02,424 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-26 02:21:02,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:21:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-26 02:21:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:21:02,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:21:02,425 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:21:02,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:21:02,629 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:21:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:21:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1966290887, now seen corresponding path program 1 times [2019-11-26 02:21:02,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:21:02,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829994663] [2019-11-26 02:21:02,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:21:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:21:02,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829994663] [2019-11-26 02:21:02,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401368344] [2019-11-26 02:21:02,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:21:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:21:02,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:21:02,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:21:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:21:02,715 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:21:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:21:02,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435501847] [2019-11-26 02:21:02,730 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:21:02,730 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:21:02,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:21:02,731 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:21:02,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:21:05,247 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:21:05,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:21:05,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 3, 3] total 16 [2019-11-26 02:21:05,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235018356] [2019-11-26 02:21:05,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:21:05,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:21:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:21:05,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:21:05,869 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 11 states. [2019-11-26 02:21:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:21:06,032 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-11-26 02:21:06,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:21:06,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-26 02:21:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:21:06,032 INFO L225 Difference]: With dead ends: 22 [2019-11-26 02:21:06,032 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:21:06,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:21:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:21:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:21:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:21:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:21:06,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-11-26 02:21:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:21:06,034 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:21:06,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:21:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:21:06,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:21:06,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:21:06,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:21:06,400 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2019-11-26 02:21:06,497 INFO L440 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= ULTIMATE.start_main_~found~0 0) (<= 0 ULTIMATE.start_main_~found~0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#string_B~0.offset| 0) (<= 0 ULTIMATE.start_main_~i~0)) [2019-11-26 02:21:06,497 INFO L440 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= ULTIMATE.start_main_~found~0 0) (<= 0 ULTIMATE.start_main_~found~0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#string_B~0.offset| 0) (<= 0 ULTIMATE.start_main_~i~0)) [2019-11-26 02:21:06,497 INFO L444 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2019-11-26 02:21:06,497 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:21:06,497 INFO L440 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (and (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |#NULL.base|) (<= 5 ULTIMATE.start_main_~i~0) (<= 0 ULTIMATE.start_main_~nc_A~0) (= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#string_A~0.base|) (+ ULTIMATE.start_main_~nc_A~0 |ULTIMATE.start_main_~#string_A~0.offset|))) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= ULTIMATE.start_main_~found~0 0) (<= 0 ULTIMATE.start_main_~found~0) (or (= ULTIMATE.start_main_~nc_B~0 0) (<= 1 ULTIMATE.start_main_~nc_B~0)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#string_B~0.offset| 0)) [2019-11-26 02:21:06,497 INFO L444 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2019-11-26 02:21:06,497 INFO L444 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2019-11-26 02:21:06,498 INFO L440 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (and (= |ULTIMATE.start_main_~#string_A~0.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#string_B~0.base|) (<= 0 |ULTIMATE.start_main_~#string_A~0.base|) (<= ULTIMATE.start_main_~found~0 0) (<= 0 ULTIMATE.start_main_~found~0) (<= 0 |#NULL.base|) (<= 5 ULTIMATE.start_main_~i~0) (= |#NULL.offset| 0) (<= 0 ULTIMATE.start_main_~nc_A~0) (= |ULTIMATE.start_main_~#string_B~0.offset| 0)) [2019-11-26 02:21:06,498 INFO L447 ceAbstractionStarter]: At program point L57(lines 14 58) the Hoare annotation is: true [2019-11-26 02:21:06,498 INFO L444 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2019-11-26 02:21:06,498 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-11-26 02:21:06,498 INFO L447 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: true [2019-11-26 02:21:06,498 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:21:06,498 INFO L444 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-26 02:21:06,499 INFO L444 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-26 02:21:06,499 INFO L444 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-11-26 02:21:06,499 INFO L447 ceAbstractionStarter]: At program point L5-2(lines 4 9) the Hoare annotation is: true [2019-11-26 02:21:06,499 INFO L444 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-11-26 02:21:06,511 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,512 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,512 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,513 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,518 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,518 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,518 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,519 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,523 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,523 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,523 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,524 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:21:06,524 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,525 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,525 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,525 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,526 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:21:06,526 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,531 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,532 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,532 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,533 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,541 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,544 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,544 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,545 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,546 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,546 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,547 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,547 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,548 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,548 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,548 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,548 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:21:06 BoogieIcfgContainer [2019-11-26 02:21:06,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:21:06,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:21:06,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:21:06,552 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:21:06,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:20:53" (3/4) ... [2019-11-26 02:21:06,561 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:21:06,580 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2019-11-26 02:21:06,593 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-26 02:21:06,594 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:21:06,631 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_53fb6c3f-1470-4898-bb71-578f5b9d9989/bin/utaipan/witness.graphml [2019-11-26 02:21:06,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:21:06,633 INFO L168 Benchmark]: Toolchain (without parser) took 13648.57 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 255.9 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -86.8 MB). Peak memory consumption was 169.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,633 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:21:06,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.7 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -236.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:21:06,634 INFO L168 Benchmark]: Boogie Preprocessor took 48.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,635 INFO L168 Benchmark]: RCFGBuilder took 475.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,635 INFO L168 Benchmark]: TraceAbstraction took 12660.58 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 105.9 MB). Peak memory consumption was 174.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,635 INFO L168 Benchmark]: Witness Printer took 79.82 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:21:06,637 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.7 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -236.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 63.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 475.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12660.58 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 105.9 MB). Peak memory consumption was 174.0 MB. Max. memory is 11.5 GB. * Witness Printer took 79.82 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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 - InvariantResult [Line: 19]: Loop Invariant [2019-11-26 02:21:06,646 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,646 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,646 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,646 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,647 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,647 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,647 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,648 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: (((((((((string_A == 0 && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL <= 0) && 0 <= string_B) && 0 <= string_A) && found <= 0) && 0 <= found) && 0 <= #NULL) && #NULL == 0) && string_B == 0) && 0 <= i - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant [2019-11-26 02:21:06,648 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,649 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,649 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,649 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:21:06,649 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,650 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,650 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,651 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,651 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-26 02:21:06,651 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((((((((((#NULL <= 0 && 0 <= string_B) && 0 <= #NULL) && 5 <= i) && 0 <= nc_A) && string_A == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && 0 == unknown-#memory_int-unknown[string_A][nc_A + string_A]) && 0 <= string_A) && found <= 0) && 0 <= found) && (nc_B == 0 || 1 <= nc_B)) && #NULL == 0) && string_B == 0 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant [2019-11-26 02:21:06,652 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,652 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,653 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,653 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,653 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,654 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,654 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,654 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((((((((string_A == 0 && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL <= 0) && 0 <= string_B) && 0 <= string_A) && found <= 0) && 0 <= found) && 0 <= #NULL) && 5 <= i) && #NULL == 0) && 0 <= nc_A) && string_B == 0 - InvariantResult [Line: 23]: Loop Invariant [2019-11-26 02:21:06,655 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,655 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,655 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,655 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,656 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2019-11-26 02:21:06,656 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,656 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-26 02:21:06,657 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: (((((((((string_A == 0 && 0 <= unknown-#StackHeapBarrier-unknown) && #NULL <= 0) && 0 <= string_B) && 0 <= string_A) && found <= 0) && 0 <= found) && 0 <= #NULL) && #NULL == 0) && string_B == 0) && 0 <= i - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 12.5s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 44 SDtfs, 91 SDslu, 83 SDs, 0 SdLazy, 514 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 25 NumberOfFragments, 161 HoareAnnotationTreeSize, 7 FomulaSimplifications, 414 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 183 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 275 ConstructedInterpolants, 0 QuantifiedInterpolants, 5891 SizeOfPredicates, 5 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 4595, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 70, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 138, TOOLS_POST_TIME[ms]: 1296, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 138, TOOLS_QUANTIFIERELIM_TIME[ms]: 1264, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 186, FLUID_QUERY_TIME[ms]: 10, FLUID_QUERIES: 329, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 99, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 35, DOMAIN_WIDEN_TIME[ms]: 814, DOMAIN_ISSUBSETEQ_APPLICATIONS: 52, DOMAIN_ISSUBSETEQ_TIME[ms]: 2166, DOMAIN_ISBOTTOM_APPLICATIONS: 70, DOMAIN_ISBOTTOM_TIME[ms]: 109, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 3875, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 3874, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 52, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 36, DAG_COMPRESSION_PROCESSED_NODES: 920, DAG_COMPRESSION_RETAINED_NODES: 225, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...