./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s5liff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/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 0e70ef280eca967ad3bc3b43c673471e885aa5e6 ................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 16:56:14,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:56:14,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:56:14,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:56:14,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:56:14,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:56:14,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:56:14,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:56:14,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:56:14,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:56:14,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:56:14,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:56:14,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:56:14,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:56:14,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:56:14,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:56:14,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:56:14,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:56:14,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:56:14,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:56:14,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:56:14,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:56:14,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:56:14,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:56:14,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:56:14,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:56:14,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:56:14,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:56:14,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:56:14,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:56:14,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:56:14,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:56:14,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:56:14,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:56:14,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:56:14,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:56:14,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:56:14,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:56:14,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:56:14,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:56:14,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:56:14,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 16:56:14,909 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:56:14,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:56:14,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:56:14,910 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:56:14,910 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:56:14,910 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:56:14,910 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:56:14,910 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:56:14,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:56:14,911 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:56:14,911 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:56:14,911 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:56:14,911 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:56:14,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:56:14,911 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:56:14,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:56:14,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:56:14,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:56:14,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:56:14,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:56:14,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:56:14,914 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_079a4687-5a44-4c38-b43e-8d83fd3b77f6/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 -> 0e70ef280eca967ad3bc3b43c673471e885aa5e6 [2019-12-07 16:56:15,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:56:15,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:56:15,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:56:15,024 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:56:15,024 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:56:15,025 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/../../sv-benchmarks/c/array-fpi/s5liff.c [2019-12-07 16:56:15,063 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/data/e378ad64f/868b3967dc3342df9ab86c5ca6646e3e/FLAGc2a4ec909 [2019-12-07 16:56:15,498 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:56:15,499 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/sv-benchmarks/c/array-fpi/s5liff.c [2019-12-07 16:56:15,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/data/e378ad64f/868b3967dc3342df9ab86c5ca6646e3e/FLAGc2a4ec909 [2019-12-07 16:56:15,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/data/e378ad64f/868b3967dc3342df9ab86c5ca6646e3e [2019-12-07 16:56:15,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:56:15,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:56:15,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:56:15,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:56:15,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:56:15,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770086bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15, skipping insertion in model container [2019-12-07 16:56:15,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:56:15,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:56:15,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:56:15,695 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:56:15,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:56:15,719 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:56:15,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15 WrapperNode [2019-12-07 16:56:15,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:56:15,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:56:15,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:56:15,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:56:15,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:56:15,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:56:15,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:56:15,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:56:15,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... [2019-12-07 16:56:15,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:56:15,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:56:15,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:56:15,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:56:15,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/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 [2019-12-07 16:56:15,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:56:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:56:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 16:56:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:56:15,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:56:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 16:56:15,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:56:16,006 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:56:16,006 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 16:56:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:16 BoogieIcfgContainer [2019-12-07 16:56:16,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:56:16,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:56:16,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:56:16,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:56:16,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:56:15" (1/3) ... [2019-12-07 16:56:16,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c12ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:56:16, skipping insertion in model container [2019-12-07 16:56:16,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:56:15" (2/3) ... [2019-12-07 16:56:16,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c12ae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:56:16, skipping insertion in model container [2019-12-07 16:56:16,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:16" (3/3) ... [2019-12-07 16:56:16,014 INFO L109 eAbstractionObserver]: Analyzing ICFG s5liff.c [2019-12-07 16:56:16,022 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:56:16,027 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:56:16,035 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 16:56:16,049 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:56:16,049 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:56:16,049 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:56:16,049 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:56:16,049 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:56:16,049 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:56:16,049 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:56:16,049 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:56:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 16:56:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 16:56:16,061 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:16,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:56:16,062 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:56:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2054767383, now seen corresponding path program 1 times [2019-12-07 16:56:16,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:16,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227841446] [2019-12-07 16:56:16,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:56:16,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227841446] [2019-12-07 16:56:16,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:16,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:56:16,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732882168] [2019-12-07 16:56:16,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:56:16,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:56:16,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:56:16,204 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 16:56:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:16,236 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-12-07 16:56:16,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:56:16,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 16:56:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:16,245 INFO L225 Difference]: With dead ends: 20 [2019-12-07 16:56:16,246 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 16:56:16,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:56:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 16:56:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 16:56:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 16:56:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-12-07 16:56:16,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2019-12-07 16:56:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:16,271 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-12-07 16:56:16,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:56:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-12-07 16:56:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 16:56:16,271 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:16,272 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:56:16,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:56:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 471069578, now seen corresponding path program 1 times [2019-12-07 16:56:16,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:16,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998922682] [2019-12-07 16:56:16,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:56:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:56:16,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998922682] [2019-12-07 16:56:16,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:56:16,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:56:16,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511948416] [2019-12-07 16:56:16,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:56:16,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:56:16,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:56:16,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:56:16,309 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-12-07 16:56:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:56:16,330 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-12-07 16:56:16,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 16:56:16,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 16:56:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:56:16,331 INFO L225 Difference]: With dead ends: 15 [2019-12-07 16:56:16,331 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 16:56:16,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:56:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 16:56:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 16:56:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 16:56:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 16:56:16,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-12-07 16:56:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:56:16,334 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 16:56:16,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:56:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 16:56:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:56:16,334 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:56:16,334 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:56:16,335 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:56:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:56:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1674030453, now seen corresponding path program 1 times [2019-12-07 16:56:16,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:56:16,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670535563] [2019-12-07 16:56:16,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:56:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:56:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:56:16,405 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:56:16,406 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:56:16,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:56:16 BoogieIcfgContainer [2019-12-07 16:56:16,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:56:16,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:56:16,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:56:16,425 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:56:16,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:56:16" (3/4) ... [2019-12-07 16:56:16,427 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:56:16,458 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_079a4687-5a44-4c38-b43e-8d83fd3b77f6/bin/utaipan/witness.graphml [2019-12-07 16:56:16,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:56:16,459 INFO L168 Benchmark]: Toolchain (without parser) took 943.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -78.4 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:16,460 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:56:16,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:16,460 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:56:16,461 INFO L168 Benchmark]: Boogie Preprocessor took 16.82 ms. Allocated memory is still 1.1 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. [2019-12-07 16:56:16,461 INFO L168 Benchmark]: RCFGBuilder took 244.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:16,461 INFO L168 Benchmark]: TraceAbstraction took 416.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:16,462 INFO L168 Benchmark]: Witness Printer took 33.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:56:16,463 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 203.24 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.82 ms. Allocated memory is still 1.1 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. * RCFGBuilder took 244.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 416.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 11.5 GB. * Witness Printer took 33.41 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 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: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = N [L27] i=0 VAL [N=1] [L27] COND TRUE i