./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f919edf50b278085ea884360d609205059ef996b ........................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:48:17,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:48:17,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:48:17,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:48:17,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:48:17,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:48:17,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:48:17,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:48:17,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:48:17,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:48:17,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:48:17,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:48:17,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:48:17,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:48:17,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:48:17,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:48:17,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:48:17,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:48:17,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:48:17,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:48:17,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:48:17,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:48:17,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:48:17,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:48:17,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:48:17,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:48:17,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:48:17,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:48:17,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:48:17,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:48:17,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:48:17,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:48:17,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:48:17,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:48:17,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:48:17,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:48:17,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:48:17,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:48:17,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:48:17,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:48:17,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:48:17,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:48:18,013 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:48:18,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:48:18,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:48:18,015 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:48:18,016 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:48:18,016 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:48:18,016 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:48:18,016 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:48:18,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:48:18,017 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:48:18,018 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:48:18,018 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:48:18,018 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:48:18,019 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:48:18,019 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:48:18,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:48:18,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:48:18,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:48:18,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:48:18,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:48:18,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:48:18,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:48:18,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:48:18,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:48:18,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:48:18,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:48:18,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:48:18,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:48:18,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:48:18,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:48:18,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:48:18,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:48:18,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:48:18,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:48:18,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:48:18,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:48:18,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:48:18,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:48:18,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:48:18,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:48:18,027 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f919edf50b278085ea884360d609205059ef996b [2020-11-22 12:48:18,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:48:18,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:48:18,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:48:18,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:48:18,324 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:48:18,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-22 12:48:18,403 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/data/63d872784/b9f7e45c7aca4111b294cce1302f048c/FLAGbf47ffc01 [2020-11-22 12:48:18,846 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:48:18,847 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-22 12:48:18,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/data/63d872784/b9f7e45c7aca4111b294cce1302f048c/FLAGbf47ffc01 [2020-11-22 12:48:19,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/data/63d872784/b9f7e45c7aca4111b294cce1302f048c [2020-11-22 12:48:19,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:48:19,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:48:19,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:19,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:48:19,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:48:19,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d2bfd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19, skipping insertion in model container [2020-11-22 12:48:19,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:48:19,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:48:19,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:19,501 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:48:19,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:19,557 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:48:19,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19 WrapperNode [2020-11-22 12:48:19,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:19,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:19,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:48:19,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:48:19,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:19,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:48:19,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:48:19,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:48:19,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... [2020-11-22 12:48:19,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:48:19,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:48:19,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:48:19,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:48:19,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/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 [2020-11-22 12:48:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:48:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:48:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:48:19,741 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-22 12:48:19,741 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-22 12:48:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:48:20,208 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:48:20,208 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-22 12:48:20,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:20 BoogieIcfgContainer [2020-11-22 12:48:20,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:48:20,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:48:20,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:48:20,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:48:20,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:48:19" (1/3) ... [2020-11-22 12:48:20,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0a57f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:20, skipping insertion in model container [2020-11-22 12:48:20,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:19" (2/3) ... [2020-11-22 12:48:20,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0a57f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:20, skipping insertion in model container [2020-11-22 12:48:20,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:20" (3/3) ... [2020-11-22 12:48:20,220 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-11-22 12:48:20,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:48:20,236 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:48:20,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:48:20,271 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:48:20,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:48:20,272 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:48:20,272 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:48:20,272 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:48:20,272 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:48:20,272 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:48:20,272 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:48:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-22 12:48:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:48:20,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:20,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:20,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1351601660, now seen corresponding path program 1 times [2020-11-22 12:48:20,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:20,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162501184] [2020-11-22 12:48:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:20,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162501184] [2020-11-22 12:48:20,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 12:48:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378817265] [2020-11-22 12:48:20,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:48:20,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:48:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:20,520 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-11-22 12:48:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:20,581 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-22 12:48:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:48:20,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-22 12:48:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:20,593 INFO L225 Difference]: With dead ends: 24 [2020-11-22 12:48:20,593 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 12:48:20,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 12:48:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-22 12:48:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 12:48:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-22 12:48:20,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-11-22 12:48:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:20,653 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-22 12:48:20,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:48:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-22 12:48:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:48:20,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:20,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:20,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:48:20,656 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2093326588, now seen corresponding path program 1 times [2020-11-22 12:48:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:20,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359034122] [2020-11-22 12:48:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:48:20,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359034122] [2020-11-22 12:48:20,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053029403] [2020-11-22 12:48:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/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 [2020-11-22 12:48:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:48:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:20,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:48:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:48:21,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:21,223 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 12:48:21,227 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:21,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:48:21,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670087921] [2020-11-22 12:48:21,314 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-22 12:48:21,314 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:48:21,322 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 12:48:21,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:48:21,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2020-11-22 12:48:21,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229731376] [2020-11-22 12:48:21,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 12:48:21,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 12:48:21,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:48:21,329 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2020-11-22 12:48:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:21,489 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-11-22 12:48:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:48:21,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-11-22 12:48:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:21,491 INFO L225 Difference]: With dead ends: 21 [2020-11-22 12:48:21,491 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 12:48:21,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:48:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 12:48:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 12:48:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 12:48:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-22 12:48:21,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-11-22 12:48:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:21,497 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-22 12:48:21,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 12:48:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-22 12:48:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:48:21,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:21,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:21,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:48:21,700 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 895711364, now seen corresponding path program 2 times [2020-11-22 12:48:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:21,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412536728] [2020-11-22 12:48:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:48:21,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:48:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:48:21,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:48:21,856 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:48:21,856 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:48:21,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:48:21,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:48:21 BoogieIcfgContainer [2020-11-22 12:48:21,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:48:21,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:48:21,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:48:21,912 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:48:21,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:20" (3/4) ... [2020-11-22 12:48:21,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:48:22,002 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ff988122-0735-4a40-9ec7-d531567e2cb4/bin/utaipan/witness.graphml [2020-11-22 12:48:22,007 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:48:22,009 INFO L168 Benchmark]: Toolchain (without parser) took 2754.86 ms. Allocated memory is still 117.4 MB. Free memory was 92.4 MB in the beginning and 52.5 MB in the end (delta: 39.9 MB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,013 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:22,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.18 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 93.9 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.32 ms. Allocated memory is still 117.4 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:22,016 INFO L168 Benchmark]: Boogie Preprocessor took 44.68 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.8 MB in the end (delta: 810.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,018 INFO L168 Benchmark]: RCFGBuilder took 555.00 ms. Allocated memory is still 117.4 MB. Free memory was 91.8 MB in the beginning and 78.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,020 INFO L168 Benchmark]: TraceAbstraction took 1699.07 ms. Allocated memory is still 117.4 MB. Free memory was 77.5 MB in the beginning and 55.2 MB in the end (delta: 22.3 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,021 INFO L168 Benchmark]: Witness Printer took 96.01 ms. Allocated memory is still 117.4 MB. Free memory was 55.2 MB in the beginning and 52.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:22,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 49.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.18 ms. Allocated memory is still 117.4 MB. Free memory was 92.1 MB in the beginning and 93.9 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.32 ms. Allocated memory is still 117.4 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.68 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.8 MB in the end (delta: 810.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 555.00 ms. Allocated memory is still 117.4 MB. Free memory was 91.8 MB in the beginning and 78.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1699.07 ms. Allocated memory is still 117.4 MB. Free memory was 77.5 MB in the beginning and 55.2 MB in the end (delta: 22.3 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 96.01 ms. Allocated memory is still 117.4 MB. Free memory was 55.2 MB in the beginning and 52.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L4] __assert_fail("0", "id_b3_o2-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 2 SDslu, 94 SDs, 0 SdLazy, 32 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1304 SizeOfPredicates, 2 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...