./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c --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_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/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 c6374d8695c81504f4ccfc7ac3dabef115b6d49d ................................................................................................................................................................................................................................................................................. 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 02:37:09,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:37:09,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:37:09,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:37:09,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:37:09,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:37:09,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:37:09,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:37:09,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:37:09,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:37:09,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:37:09,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:37:09,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:37:09,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:37:09,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:37:09,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:37:09,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:37:09,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:37:09,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:37:09,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:37:09,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:37:09,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:37:09,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:37:09,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:37:09,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:37:09,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:37:09,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:37:09,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:37:09,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:37:09,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:37:09,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:37:09,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:37:09,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:37:09,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:37:09,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:37:09,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:37:09,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:37:09,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:37:09,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:37:09,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:37:09,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:37:09,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:37:09,711 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:37:09,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:37:09,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:37:09,722 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:37:09,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:37:09,722 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:37:09,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:37:09,722 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:37:09,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:37:09,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:37:09,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:37:09,723 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:37:09,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:37:09,724 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:37:09,724 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:37:09,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:37:09,725 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:37:09,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:37:09,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:37:09,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:37:09,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:37:09,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:37:09,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:37:09,727 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:37:09,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:37:09,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:37:09,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:37:09,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:37:09,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:37:09,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:37:09,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:37:09,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:37:09,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:37:09,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:37:09,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:37:09,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:37:09,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:37:09,730 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_97193636-0076-4902-acdb-e36b0f1ef414/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 -> c6374d8695c81504f4ccfc7ac3dabef115b6d49d [2019-11-26 02:37:09,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:37:09,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:37:09,915 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:37:09,916 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:37:09,916 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:37:09,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2019-11-26 02:37:09,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/data/12fb5cea2/468999e8f0364193b8af002c215f530e/FLAG326bf3e6c [2019-11-26 02:37:10,353 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:37:10,353 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2019-11-26 02:37:10,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/data/12fb5cea2/468999e8f0364193b8af002c215f530e/FLAG326bf3e6c [2019-11-26 02:37:10,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/data/12fb5cea2/468999e8f0364193b8af002c215f530e [2019-11-26 02:37:10,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:37:10,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:37:10,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:10,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:37:10,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:37:10,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d40d508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10, skipping insertion in model container [2019-11-26 02:37:10,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:37:10,742 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:37:10,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:10,868 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:37:10,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:10,950 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:37:10,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10 WrapperNode [2019-11-26 02:37:10,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:10,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:10,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:37:10,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:37:10,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:10,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:37:10,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:37:10,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:37:10,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... [2019-11-26 02:37:10,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:37:10,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:37:10,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:37:10,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:37:10,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/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 02:37:11,056 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-26 02:37:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-26 02:37:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:37:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:37:11,059 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2019-11-26 02:37:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2019-11-26 02:37:11,240 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:37:11,241 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:37:11,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:11 BoogieIcfgContainer [2019-11-26 02:37:11,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:37:11,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:37:11,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:37:11,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:37:11,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:37:10" (1/3) ... [2019-11-26 02:37:11,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328a1755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:11, skipping insertion in model container [2019-11-26 02:37:11,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:10" (2/3) ... [2019-11-26 02:37:11,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328a1755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:11, skipping insertion in model container [2019-11-26 02:37:11,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:11" (3/3) ... [2019-11-26 02:37:11,248 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2019-11-26 02:37:11,257 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:37:11,268 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-26 02:37:11,278 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-26 02:37:11,298 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:37:11,298 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:37:11,298 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:37:11,299 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:37:11,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:37:11,299 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:37:11,299 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:37:11,299 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:37:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-26 02:37:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:37:11,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:11,320 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:11,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:37:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1282022558, now seen corresponding path program 1 times [2019-11-26 02:37:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:11,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045876279] [2019-11-26 02:37:11,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:11,523 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 02:37:11,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045876279] [2019-11-26 02:37:11,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:11,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:37:11,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306680741] [2019-11-26 02:37:11,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:37:11,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:37:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:37:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:37:11,547 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-26 02:37:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:11,613 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-26 02:37:11,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:37:11,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-26 02:37:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:11,622 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:37:11,622 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:37:11,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:37:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:37:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:37:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:37:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:37:11,650 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-26 02:37:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:11,650 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:37:11,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:37:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:37:11,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:37:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:37:11,693 INFO L444 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L440 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point L9-1(lines 6 11) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point fEXIT(lines 6 11) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L447 ceAbstractionStarter]: At program point fENTRY(lines 6 11) the Hoare annotation is: true [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point fFINAL(lines 6 11) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:37:11,694 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:37:11,695 INFO L447 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: true [2019-11-26 02:37:11,695 INFO L444 ceAbstractionStarter]: For program point L21-1(lines 20 22) no Hoare annotation was computed. [2019-11-26 02:37:11,695 INFO L447 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2019-11-26 02:37:11,695 INFO L444 ceAbstractionStarter]: For program point f2EXIT(lines 13 18) no Hoare annotation was computed. [2019-11-26 02:37:11,695 INFO L444 ceAbstractionStarter]: For program point L16-1(lines 13 18) no Hoare annotation was computed. [2019-11-26 02:37:11,695 INFO L444 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-11-26 02:37:11,695 INFO L447 ceAbstractionStarter]: At program point f2ENTRY(lines 13 18) the Hoare annotation is: true [2019-11-26 02:37:11,696 INFO L444 ceAbstractionStarter]: For program point f2FINAL(lines 13 18) no Hoare annotation was computed. [2019-11-26 02:37:11,696 INFO L444 ceAbstractionStarter]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2019-11-26 02:37:11,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:37:11 BoogieIcfgContainer [2019-11-26 02:37:11,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:37:11,699 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:37:11,699 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:37:11,699 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:37:11,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:11" (3/4) ... [2019-11-26 02:37:11,703 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:37:11,707 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2019-11-26 02:37:11,708 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f2 [2019-11-26 02:37:11,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-26 02:37:11,711 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-26 02:37:11,745 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_97193636-0076-4902-acdb-e36b0f1ef414/bin/utaipan/witness.graphml [2019-11-26 02:37:11,746 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:37:11,748 INFO L168 Benchmark]: Toolchain (without parser) took 1035.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -138.8 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:11,748 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:11,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:11,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:11,753 INFO L168 Benchmark]: Boogie Preprocessor took 14.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:11,759 INFO L168 Benchmark]: RCFGBuilder took 249.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:11,760 INFO L168 Benchmark]: TraceAbstraction took 456.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:11,761 INFO L168 Benchmark]: Witness Printer took 46.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:11,764 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 238.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -186.6 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 249.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 456.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Witness Printer took 46.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 2 error locations. Result: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 8 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 117 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...