./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/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 d3ded6f4470c26b608997f650ebe66ef1cf6f845 ................................................................................................................................................................................................................................................................................................................ 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 0.1.24-6b5699a [2019-11-26 02:17:47,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:17:47,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:17:47,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:17:47,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:17:47,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:17:47,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:17:47,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:17:47,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:17:47,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:17:47,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:17:47,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:17:47,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:17:47,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:17:47,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:17:47,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:17:47,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:17:47,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:17:47,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:17:47,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:17:47,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:17:47,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:17:47,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:17:47,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:17:47,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:17:47,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:17:47,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:17:47,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:17:47,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:17:47,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:17:47,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:17:47,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:17:47,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:17:47,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:17:47,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:17:47,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:17:47,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:17:47,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:17:47,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:17:47,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:17:47,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:17:47,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:17:47,590 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:17:47,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:17:47,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:17:47,601 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:17:47,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:17:47,601 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:17:47,602 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:17:47,602 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:17:47,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:17:47,602 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:17:47,602 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:17:47,603 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:17:47,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:17:47,603 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:17:47,603 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:17:47,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:17:47,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:17:47,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:17:47,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:17:47,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:17:47,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:17:47,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:17:47,605 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:17:47,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:17:47,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:17:47,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:17:47,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:17:47,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:17:47,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:17:47,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:17:47,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:17:47,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:17:47,607 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:17:47,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:17:47,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:17:47,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:17:47,608 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_998ba280-3ab7-4474-9a8f-a2c658156f69/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 -> d3ded6f4470c26b608997f650ebe66ef1cf6f845 [2019-11-26 02:17:47,743 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:17:47,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:17:47,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:17:47,766 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:17:47,766 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:17:47,767 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex1.c [2019-11-26 02:17:47,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/data/480d01423/16916f2e88b147b88a8b2b20a44f2668/FLAG4b463a032 [2019-11-26 02:17:48,231 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:17:48,232 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex1.c [2019-11-26 02:17:48,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/data/480d01423/16916f2e88b147b88a8b2b20a44f2668/FLAG4b463a032 [2019-11-26 02:17:48,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/data/480d01423/16916f2e88b147b88a8b2b20a44f2668 [2019-11-26 02:17:48,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:17:48,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:17:48,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:48,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:17:48,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:17:48,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dee4c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48, skipping insertion in model container [2019-11-26 02:17:48,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:17:48,672 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:17:48,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:48,865 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:17:48,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:17:48,948 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:17:48,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48 WrapperNode [2019-11-26 02:17:48,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:17:48,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:48,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:17:48,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:17:48,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:17:48,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:17:48,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:17:48,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:17:48,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... [2019-11-26 02:17:48,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:17:48,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:17:48,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:17:48,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:17:48,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/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 02:17:49,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:17:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:17:49,064 INFO L130 BoogieDeclarations]: Found specification of procedure r1 [2019-11-26 02:17:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure r1 [2019-11-26 02:17:49,299 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:17:49,299 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-26 02:17:49,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:49 BoogieIcfgContainer [2019-11-26 02:17:49,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:17:49,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:17:49,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:17:49,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:17:49,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:17:48" (1/3) ... [2019-11-26 02:17:49,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2366426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:49, skipping insertion in model container [2019-11-26 02:17:49,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:17:48" (2/3) ... [2019-11-26 02:17:49,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2366426f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:17:49, skipping insertion in model container [2019-11-26 02:17:49,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:49" (3/3) ... [2019-11-26 02:17:49,307 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex1.c [2019-11-26 02:17:49,324 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:17:49,330 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-26 02:17:49,340 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-26 02:17:49,364 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:17:49,364 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:17:49,364 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:17:49,365 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:17:49,365 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:17:49,365 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:17:49,365 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:17:49,365 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:17:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-26 02:17:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:17:49,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:49,390 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:17:49,390 INFO L410 AbstractCegarLoop]: === Iteration 1 === [r1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:49,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:49,397 INFO L82 PathProgramCache]: Analyzing trace with hash 920915409, now seen corresponding path program 1 times [2019-11-26 02:17:49,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:49,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085424073] [2019-11-26 02:17:49,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:49,562 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 02:17:49,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085424073] [2019-11-26 02:17:49,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:49,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:49,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950984623] [2019-11-26 02:17:49,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:17:49,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:17:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:17:49,581 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2019-11-26 02:17:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:49,724 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-11-26 02:17:49,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:49,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-26 02:17:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:49,733 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:17:49,734 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:17:49,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:17:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:17:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:17:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:17:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-26 02:17:49,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2019-11-26 02:17:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:49,772 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-26 02:17:49,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:17:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-26 02:17:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:17:49,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:49,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:49,773 INFO L410 AbstractCegarLoop]: === Iteration 2 === [r1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1516393339, now seen corresponding path program 1 times [2019-11-26 02:17:49,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:49,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164762498] [2019-11-26 02:17:49,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:17:49,813 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 02:17:49,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164762498] [2019-11-26 02:17:49,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:17:49,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:17:49,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869186040] [2019-11-26 02:17:49,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:17:49,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:17:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:17:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:17:49,816 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2019-11-26 02:17:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:17:49,887 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-26 02:17:49,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:17:49,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:17:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:17:49,888 INFO L225 Difference]: With dead ends: 31 [2019-11-26 02:17:49,888 INFO L226 Difference]: Without dead ends: 29 [2019-11-26 02:17:49,889 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 [2019-11-26 02:17:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-26 02:17:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2019-11-26 02:17:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:17:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-26 02:17:49,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 7 [2019-11-26 02:17:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:17:49,895 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-26 02:17:49,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:17:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-26 02:17:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:17:49,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:17:49,896 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:17:49,897 INFO L410 AbstractCegarLoop]: === Iteration 3 === [r1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, r1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:17:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:17:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 236446803, now seen corresponding path program 1 times [2019-11-26 02:17:49,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:17:49,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078603056] [2019-11-26 02:17:49,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:17:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:17:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:17:49,935 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:17:49,936 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:17:49,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:17:49 BoogieIcfgContainer [2019-11-26 02:17:49,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:17:49,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:17:49,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:17:49,966 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:17:49,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:17:49" (3/4) ... [2019-11-26 02:17:49,968 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:17:50,025 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_998ba280-3ab7-4474-9a8f-a2c658156f69/bin/utaipan/witness.graphml [2019-11-26 02:17:50,025 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:17:50,028 INFO L168 Benchmark]: Toolchain (without parser) took 1383.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -138.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:50,028 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:50,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -207.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:50,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:17:50,032 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 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. [2019-11-26 02:17:50,042 INFO L168 Benchmark]: RCFGBuilder took 305.13 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:50,043 INFO L168 Benchmark]: TraceAbstraction took 663.89 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: 49.7 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:17:50,043 INFO L168 Benchmark]: Witness Printer took 59.73 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 02:17:50,046 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 304.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -207.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 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 305.13 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 663.89 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: 49.7 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. * Witness Printer took 59.73 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: integer overflow possible integer overflow possible We found a FailurePath: [L26] int ls = __VERIFIER_nondet_int(); [L27] COND TRUE ls >= 0 [L22] CALL r1(ls,0) VAL [\old(a)=0, \old(ls)=2147483647] [L14] COND FALSE !(ls == 0) VAL [\old(a)=0, \old(ls)=2147483647, a=0, ls=2147483647] [L17] ls-1 VAL [\old(a)=0, \old(ls)=2147483647, a=0, ls=2147483647] [L17] ls+1 VAL [\old(a)=0, \old(ls)=2147483647, a=0, ls=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 6 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 55 SDslu, 38 SDs, 0 SdLazy, 96 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s 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, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 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...