./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/while_infinite_loop_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/while_infinite_loop_4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/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 ef9ee2b82a40720ec57dc1562759dd601b686b38 ........................................................................................................................................................................................................................................................................ 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 0.1.24-6b5699a [2019-11-26 03:00:52,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:00:52,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:00:52,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:00:52,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:00:52,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:00:52,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:00:52,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:00:52,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:00:52,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:00:52,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:00:52,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:00:52,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:00:52,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:00:52,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:00:52,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:00:52,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:00:52,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:00:52,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:00:52,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:00:52,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:00:52,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:00:52,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:00:52,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:00:52,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:00:52,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:00:52,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:00:52,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:00:52,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:00:52,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:00:52,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:00:52,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:00:52,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:00:52,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:00:52,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:00:52,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:00:52,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:00:52,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:00:52,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:00:52,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:00:52,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:00:52,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 03:00:52,927 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:00:52,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:00:52,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:00:52,937 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:00:52,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:00:52,937 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:00:52,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 03:00:52,938 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:00:52,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:00:52,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 03:00:52,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 03:00:52,939 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:00:52,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 03:00:52,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 03:00:52,939 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 03:00:52,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:00:52,940 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:00:52,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:00:52,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:00:52,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:00:52,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 03:00:52,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:00:52,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 03:00:52,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:00:52,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 03:00:52,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 03:00:52,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:00:52,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:00:52,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:00:52,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:00:52,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:00:52,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:00:52,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 03:00:52,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 03:00:52,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 03:00:52,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 03:00:52,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:00:52,946 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_76610273-cb41-44ae-b18a-5725b75ad7de/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 -> ef9ee2b82a40720ec57dc1562759dd601b686b38 [2019-11-26 03:00:53,110 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:00:53,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:00:53,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:00:53,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:00:53,129 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:00:53,130 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/../../sv-benchmarks/c/loops/while_infinite_loop_4.c [2019-11-26 03:00:53,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/data/4eb3b4df3/380655d680ea40ffa977eda436ccf01e/FLAG36b21dc65 [2019-11-26 03:00:53,567 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:00:53,568 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/sv-benchmarks/c/loops/while_infinite_loop_4.c [2019-11-26 03:00:53,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/data/4eb3b4df3/380655d680ea40ffa977eda436ccf01e/FLAG36b21dc65 [2019-11-26 03:00:53,989 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/data/4eb3b4df3/380655d680ea40ffa977eda436ccf01e [2019-11-26 03:00:53,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:00:53,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:00:53,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:53,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:00:54,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:00:54,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:53" (1/1) ... [2019-11-26 03:00:54,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4d2edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54, skipping insertion in model container [2019-11-26 03:00:54,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:53" (1/1) ... [2019-11-26 03:00:54,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:00:54,029 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:00:54,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:54,190 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:00:54,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:54,319 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:00:54,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54 WrapperNode [2019-11-26 03:00:54,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:54,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:54,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:00:54,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:00:54,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:54,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:00:54,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:00:54,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:00:54,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... [2019-11-26 03:00:54,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:00:54,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:00:54,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:00:54,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:00:54,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:00:54,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:00:54,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:00:54,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:00:54,645 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-26 03:00:54,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:54 BoogieIcfgContainer [2019-11-26 03:00:54,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:00:54,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:00:54,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:00:54,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:00:54,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:00:53" (1/3) ... [2019-11-26 03:00:54,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ff7f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:54, skipping insertion in model container [2019-11-26 03:00:54,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:54" (2/3) ... [2019-11-26 03:00:54,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ff7f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:54, skipping insertion in model container [2019-11-26 03:00:54,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:54" (3/3) ... [2019-11-26 03:00:54,653 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2019-11-26 03:00:54,661 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:00:54,666 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-26 03:00:54,676 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-26 03:00:54,697 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:00:54,698 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 03:00:54,698 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:00:54,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:00:54,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:00:54,698 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:00:54,698 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:00:54,698 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:00:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-26 03:00:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:00:54,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:54,715 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:00:54,715 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:00:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2589319, now seen corresponding path program 1 times [2019-11-26 03:00:54,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:54,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856423520] [2019-11-26 03:00:54,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:00:54,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856423520] [2019-11-26 03:00:54,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:00:54,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 03:00:54,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511482784] [2019-11-26 03:00:54,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 03:00:54,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:00:54,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 03:00:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 03:00:54,814 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 2 states. [2019-11-26 03:00:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:54,828 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2019-11-26 03:00:54,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 03:00:54,829 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-11-26 03:00:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:54,836 INFO L225 Difference]: With dead ends: 14 [2019-11-26 03:00:54,836 INFO L226 Difference]: Without dead ends: 5 [2019-11-26 03:00:54,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 03:00:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-11-26 03:00:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-11-26 03:00:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-26 03:00:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-11-26 03:00:54,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 4 [2019-11-26 03:00:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:54,861 INFO L462 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-11-26 03:00:54,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 03:00:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-11-26 03:00:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:00:54,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:54,862 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:00:54,862 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 03:00:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2591754, now seen corresponding path program 1 times [2019-11-26 03:00:54,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:54,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983639724] [2019-11-26 03:00:54,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:00:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:00:54,895 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 03:00:54,896 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 03:00:54,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:00:54 BoogieIcfgContainer [2019-11-26 03:00:54,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:00:54,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:00:54,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:00:54,912 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:00:54,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:54" (3/4) ... [2019-11-26 03:00:54,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 03:00:54,944 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_76610273-cb41-44ae-b18a-5725b75ad7de/bin/utaipan/witness.graphml [2019-11-26 03:00:54,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:00:54,946 INFO L168 Benchmark]: Toolchain (without parser) took 953.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -123.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:54,946 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:54,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:54,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:54,948 INFO L168 Benchmark]: Boogie Preprocessor took 18.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:54,949 INFO L168 Benchmark]: RCFGBuilder took 281.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:54,949 INFO L168 Benchmark]: TraceAbstraction took 263.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:54,950 INFO L168 Benchmark]: Witness Printer took 32.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:54,954 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 281.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 263.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * Witness Printer took 32.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 [L14] COND TRUE 1 [L15] x=1 [L4] COND TRUE !(cond) VAL [x=1] [L5] __VERIFIER_error() VAL [x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...