./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/McCarthy91-1.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_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/McCarthy91-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/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 90ff89d2ba0517af453003604f3ee5a230759bec ..................................................................................................................................................................................................................................................... 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 [2020-11-28 07:41:22,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:22,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:22,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:22,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:22,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:22,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:22,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:22,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:22,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:22,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:22,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:22,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:22,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:22,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:22,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:22,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:22,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:22,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:22,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:22,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:22,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:22,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:22,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:22,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:22,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:22,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:22,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:22,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:22,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:22,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:22,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:22,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:22,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:22,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:22,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:22,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:22,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:22,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:22,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:22,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:22,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:22,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:22,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:22,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:22,809 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:22,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:22,809 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:22,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:22,810 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:22,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:22,810 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:22,811 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:22,812 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:22,812 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:22,812 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:22,812 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:22,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:22,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:22,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:22,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:22,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:22,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:22,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:22,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:22,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:22,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:22,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:22,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:22,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:22,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:22,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:22,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:22,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:22,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:22,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:22,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:22,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:22,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:22,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:22,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:22,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:22,819 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_86904654-b8db-49b4-ae1b-4bae5c4b6b35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90ff89d2ba0517af453003604f3ee5a230759bec [2020-11-28 07:41:23,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:23,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:23,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:23,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:23,122 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:23,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/../../sv-benchmarks/c/recursive/McCarthy91-1.c [2020-11-28 07:41:23,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/data/4776c8a59/b3d9b120b50747ec91bdeab989e6b197/FLAG2aaef780f [2020-11-28 07:41:23,748 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:23,748 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/sv-benchmarks/c/recursive/McCarthy91-1.c [2020-11-28 07:41:23,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/data/4776c8a59/b3d9b120b50747ec91bdeab989e6b197/FLAG2aaef780f [2020-11-28 07:41:24,129 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/data/4776c8a59/b3d9b120b50747ec91bdeab989e6b197 [2020-11-28 07:41:24,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:24,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:24,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:24,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:24,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:24,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28845211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24, skipping insertion in model container [2020-11-28 07:41:24,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:24,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:24,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:24,408 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:24,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:24,441 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:24,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24 WrapperNode [2020-11-28 07:41:24,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:24,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:24,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:24,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:24,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:24,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:24,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:24,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:24,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... [2020-11-28 07:41:24,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:24,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:24,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:24,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:24,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/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 [2020-11-28 07:41:24,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:24,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:24,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:24,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:24,569 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-11-28 07:41:24,569 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-11-28 07:41:25,000 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:25,000 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:41:25,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25 BoogieIcfgContainer [2020-11-28 07:41:25,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:25,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:25,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:25,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:25,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:24" (1/3) ... [2020-11-28 07:41:25,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b52ed9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:25, skipping insertion in model container [2020-11-28 07:41:25,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:24" (2/3) ... [2020-11-28 07:41:25,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b52ed9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:25, skipping insertion in model container [2020-11-28 07:41:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25" (3/3) ... [2020-11-28 07:41:25,010 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91-1.c [2020-11-28 07:41:25,021 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:25,025 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:25,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:25,059 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:25,059 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:25,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:25,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:25,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:25,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:25,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:25,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 07:41:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:41:25,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:25,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:25,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash -544161594, now seen corresponding path program 1 times [2020-11-28 07:41:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172668902] [2020-11-28 07:41:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:25,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:25,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:25,327 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:41:25,328 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:25,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:25,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:25 BoogieIcfgContainer [2020-11-28 07:41:25,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:25,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:25,369 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:25,369 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:25,370 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:25" (3/4) ... [2020-11-28 07:41:25,372 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:41:25,440 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_86904654-b8db-49b4-ae1b-4bae5c4b6b35/bin/utaipan/witness.graphml [2020-11-28 07:41:25,440 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:25,447 INFO L168 Benchmark]: Toolchain (without parser) took 1306.23 ms. Allocated memory is still 109.1 MB. Free memory was 76.2 MB in the beginning and 56.4 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,448 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 83.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:25,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.45 ms. Allocated memory is still 109.1 MB. Free memory was 76.1 MB in the beginning and 86.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 109.1 MB. Free memory was 86.3 MB in the beginning and 85.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:25,451 INFO L168 Benchmark]: Boogie Preprocessor took 17.75 ms. Allocated memory is still 109.1 MB. Free memory was 85.2 MB in the beginning and 84.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,452 INFO L168 Benchmark]: RCFGBuilder took 509.58 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 71.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,455 INFO L168 Benchmark]: TraceAbstraction took 363.55 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 58.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,456 INFO L168 Benchmark]: Witness Printer took 72.50 ms. Allocated memory is still 109.1 MB. Free memory was 58.5 MB in the beginning and 56.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:25,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 83.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.45 ms. Allocated memory is still 109.1 MB. Free memory was 76.1 MB in the beginning and 86.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.63 ms. Allocated memory is still 109.1 MB. Free memory was 86.3 MB in the beginning and 85.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.75 ms. Allocated memory is still 109.1 MB. Free memory was 85.2 MB in the beginning and 84.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 509.58 ms. Allocated memory is still 109.1 MB. Free memory was 84.2 MB in the beginning and 71.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 363.55 ms. Allocated memory is still 109.1 MB. Free memory was 70.6 MB in the beginning and 58.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 72.50 ms. Allocated memory is still 109.1 MB. Free memory was 58.5 MB in the beginning and 56.4 MB in the end (delta: 2.1 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L27] int x = __VERIFIER_nondet_int(); [L28] CALL, EXPR f91(x) VAL [\old(x)=102] [L18] COND TRUE x > 100 [L19] return x -10; VAL [\old(x)=102, \result=92, x=102] [L28] RET, EXPR f91(x) [L28] int result = f91(x); [L29] COND FALSE !(result == 91 || x > 102 && result == x - 10) [L3] __assert_fail("0", "McCarthy91-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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...