./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f1df70d37f8afdd882c0c58eaed03ed11e314407 ....................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:29:57,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:29:57,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:29:57,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:29:57,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:29:57,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:29:57,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:29:57,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:29:57,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:29:57,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:29:57,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:29:57,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:29:57,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:29:57,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:29:57,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:29:57,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:29:57,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:29:57,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:29:57,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:29:57,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:29:57,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:29:57,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:29:57,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:29:57,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:29:57,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:29:57,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:29:57,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:29:57,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:29:57,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:29:57,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:29:57,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:29:57,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:29:57,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:29:57,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:29:57,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:29:57,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:29:57,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:29:57,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:29:57,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:29:57,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:29:57,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:29:57,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 16:29:58,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:29:58,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:29:58,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:29:58,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:29:58,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:29:58,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:29:58,004 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:29:58,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:29:58,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:29:58,004 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:29:58,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:29:58,005 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:29:58,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:29:58,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:29:58,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:29:58,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:29:58,007 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_a6601f1c-29b2-4936-95bc-668181334a5f/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1df70d37f8afdd882c0c58eaed03ed11e314407 [2019-12-07 16:29:58,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:29:58,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:29:58,117 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:29:58,118 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:29:58,118 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:29:58,119 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex2.c [2019-12-07 16:29:58,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/data/2abb1b608/f5609044cf464ad799c424d4f6888243/FLAGbb765dd97 [2019-12-07 16:29:58,482 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:29:58,483 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex2.c [2019-12-07 16:29:58,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/data/2abb1b608/f5609044cf464ad799c424d4f6888243/FLAGbb765dd97 [2019-12-07 16:29:58,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/data/2abb1b608/f5609044cf464ad799c424d4f6888243 [2019-12-07 16:29:58,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:29:58,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:29:58,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:29:58,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:29:58,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:29:58,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431cfabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58, skipping insertion in model container [2019-12-07 16:29:58,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:29:58,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:29:58,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:29:58,637 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:29:58,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:29:58,694 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:29:58,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58 WrapperNode [2019-12-07 16:29:58,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:29:58,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:29:58,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:29:58,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:29:58,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:29:58,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:29:58,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:29:58,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:29:58,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... [2019-12-07 16:29:58,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:29:58,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:29:58,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:29:58,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:29:58,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/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 16:29:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-12-07 16:29:58,767 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-12-07 16:29:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-12-07 16:29:58,768 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-12-07 16:29:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:29:58,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:29:58,894 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:29:58,894 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:29:58,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:29:58 BoogieIcfgContainer [2019-12-07 16:29:58,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:29:58,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:29:58,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:29:58,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:29:58,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:29:58" (1/3) ... [2019-12-07 16:29:58,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a716961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:29:58, skipping insertion in model container [2019-12-07 16:29:58,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:29:58" (2/3) ... [2019-12-07 16:29:58,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a716961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:29:58, skipping insertion in model container [2019-12-07 16:29:58,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:29:58" (3/3) ... [2019-12-07 16:29:58,900 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex2.c [2019-12-07 16:29:58,906 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:29:58,910 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 16:29:58,917 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 16:29:58,932 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:29:58,932 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:29:58,933 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:29:58,933 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:29:58,933 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:29:58,933 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:29:58,933 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:29:58,933 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:29:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 16:29:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 16:29:58,947 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:29:58,948 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 16:29:58,948 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 16:29:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:29:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1512012543, now seen corresponding path program 1 times [2019-12-07 16:29:58,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:29:58,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741019005] [2019-12-07 16:29:58,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:29:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:29:59,058 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 16:29:59,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741019005] [2019-12-07 16:29:59,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:29:59,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:29:59,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126566351] [2019-12-07 16:29:59,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:29:59,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:29:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:29:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:29:59,073 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-12-07 16:29:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:29:59,139 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-12-07 16:29:59,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:29:59,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 16:29:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:29:59,146 INFO L225 Difference]: With dead ends: 36 [2019-12-07 16:29:59,147 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 16:29:59,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:29:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 16:29:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-12-07 16:29:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 16:29:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-12-07 16:29:59,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 6 [2019-12-07 16:29:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:29:59,172 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-12-07 16:29:59,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:29:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-12-07 16:29:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 16:29:59,173 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:29:59,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:29:59,173 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 16:29:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:29:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash -372251385, now seen corresponding path program 1 times [2019-12-07 16:29:59,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:29:59,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044323627] [2019-12-07 16:29:59,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:29:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:29:59,198 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 16:29:59,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044323627] [2019-12-07 16:29:59,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:29:59,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 16:29:59,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565150718] [2019-12-07 16:29:59,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:29:59,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:29:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:29:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:29:59,200 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2019-12-07 16:29:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:29:59,229 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-12-07 16:29:59,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:29:59,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 16:29:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:29:59,231 INFO L225 Difference]: With dead ends: 22 [2019-12-07 16:29:59,231 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 16:29:59,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 16:29:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 16:29:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-12-07 16:29:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 16:29:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-12-07 16:29:59,236 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2019-12-07 16:29:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:29:59,237 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-12-07 16:29:59,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:29:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-12-07 16:29:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:29:59,237 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:29:59,237 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:29:59,238 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 16:29:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:29:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash -135389413, now seen corresponding path program 1 times [2019-12-07 16:29:59,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:29:59,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549821408] [2019-12-07 16:29:59,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:29:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:29:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:29:59,277 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:29:59,277 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:29:59,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:29:59 BoogieIcfgContainer [2019-12-07 16:29:59,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:29:59,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:29:59,294 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:29:59,294 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:29:59,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:29:58" (3/4) ... [2019-12-07 16:29:59,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:29:59,322 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a6601f1c-29b2-4936-95bc-668181334a5f/bin/utaipan/witness.graphml [2019-12-07 16:29:59,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:29:59,323 INFO L168 Benchmark]: Toolchain (without parser) took 823.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 943.5 MB in the beginning and 1.0 GB in the end (delta: -88.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:29:59,324 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:29:59,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -150.9 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 16:29:59,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.84 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 16:29:59,325 INFO L168 Benchmark]: Boogie Preprocessor took 11.20 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 16:29:59,325 INFO L168 Benchmark]: RCFGBuilder took 168.26 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 16:29:59,325 INFO L168 Benchmark]: TraceAbstraction took 397.43 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:29:59,326 INFO L168 Benchmark]: Witness Printer took 28.26 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:29:59,328 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 194.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.0 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -150.9 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.84 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 11.20 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 168.26 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 397.43 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: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. * Witness Printer took 28.26 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L30] int i = __VERIFIER_nondet_int(); [L31] int x = __VERIFIER_nondet_int(); [L32] COND TRUE i >= 0 && x >= 0 [L33] CALL f(i,x) VAL [\old(i)=2147483647, \old(x)=1] [L18] COND FALSE !(i==0) VAL [\old(i)=2147483647, \old(x)=1, i=2147483647, x=1] [L21] EXPR i-1 VAL [\old(i)=2147483647, \old(x)=1, i=2147483647, x=1] [L21] CALL g(i-1,x,i) VAL [\old(a)=2147483646, \old(b)=1, \old(c)=2147483647] [L26] b+c VAL [\old(a)=2147483646, \old(b)=1, \old(c)=2147483647, a=2147483646, b=1, c=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 4 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 23 SDslu, 84 SDs, 0 SdLazy, 44 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 171 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...