./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/cstrncmp_false-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/cstrncmp_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/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 01bf3c13fb8dbd0777aa4be7a3e595427bd1de37 .............................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.23-635dfa2 [2018-12-03 07:40:43,019 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 07:40:43,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 07:40:43,026 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 07:40:43,026 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 07:40:43,027 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 07:40:43,027 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 07:40:43,028 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 07:40:43,029 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 07:40:43,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 07:40:43,030 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 07:40:43,030 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 07:40:43,031 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 07:40:43,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 07:40:43,031 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 07:40:43,032 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 07:40:43,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 07:40:43,033 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 07:40:43,034 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 07:40:43,035 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 07:40:43,035 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 07:40:43,036 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 07:40:43,037 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 07:40:43,037 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 07:40:43,038 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 07:40:43,038 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 07:40:43,038 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 07:40:43,039 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 07:40:43,039 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 07:40:43,040 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 07:40:43,040 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 07:40:43,040 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 07:40:43,040 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 07:40:43,040 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 07:40:43,041 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 07:40:43,041 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 07:40:43,041 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-03 07:40:43,049 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 07:40:43,049 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 07:40:43,049 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 07:40:43,049 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 07:40:43,049 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 07:40:43,050 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 07:40:43,050 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 07:40:43,050 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 07:40:43,051 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 07:40:43,051 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 07:40:43,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 07:40:43,052 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 07:40:43,052 INFO L133 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/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/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 -> 01bf3c13fb8dbd0777aa4be7a3e595427bd1de37 [2018-12-03 07:40:43,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 07:40:43,078 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 07:40:43,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 07:40:43,081 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 07:40:43,081 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 07:40:43,082 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/cstrncmp_false-no-overflow.c [2018-12-03 07:40:43,121 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/data/12a17d3d8/b5d6edf7e91d4bcfadfcca581e9259f3/FLAG8e18814ff [2018-12-03 07:40:43,544 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 07:40:43,545 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/sv-benchmarks/c/termination-crafted-lit/cstrncmp_false-no-overflow.c [2018-12-03 07:40:43,548 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/data/12a17d3d8/b5d6edf7e91d4bcfadfcca581e9259f3/FLAG8e18814ff [2018-12-03 07:40:43,556 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/data/12a17d3d8/b5d6edf7e91d4bcfadfcca581e9259f3 [2018-12-03 07:40:43,557 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 07:40:43,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 07:40:43,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 07:40:43,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 07:40:43,561 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 07:40:43,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bd89b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43, skipping insertion in model container [2018-12-03 07:40:43,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 07:40:43,577 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 07:40:43,666 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:40:43,672 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 07:40:43,683 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:40:43,691 INFO L195 MainTranslator]: Completed translation [2018-12-03 07:40:43,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43 WrapperNode [2018-12-03 07:40:43,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 07:40:43,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 07:40:43,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 07:40:43,692 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 07:40:43,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 07:40:43,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 07:40:43,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 07:40:43,711 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 07:40:43,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... [2018-12-03 07:40:43,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 07:40:43,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 07:40:43,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 07:40:43,761 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 07:40:43,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/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 [2018-12-03 07:40:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-12-03 07:40:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 07:40:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 07:40:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 07:40:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 07:40:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure cstrncmp [2018-12-03 07:40:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrncmp [2018-12-03 07:40:43,937 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 07:40:43,938 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 07:40:43,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:40:43 BoogieIcfgContainer [2018-12-03 07:40:43,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 07:40:43,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 07:40:43,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 07:40:43,941 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 07:40:43,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 07:40:43" (1/3) ... [2018-12-03 07:40:43,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225db077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:40:43, skipping insertion in model container [2018-12-03 07:40:43,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:40:43" (2/3) ... [2018-12-03 07:40:43,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225db077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:40:43, skipping insertion in model container [2018-12-03 07:40:43,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:40:43" (3/3) ... [2018-12-03 07:40:43,944 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncmp_false-no-overflow.c [2018-12-03 07:40:43,953 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 07:40:43,959 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-03 07:40:43,974 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-03 07:40:43,995 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 07:40:43,995 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 07:40:43,995 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 07:40:43,995 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 07:40:43,995 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 07:40:43,995 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 07:40:43,995 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 07:40:43,995 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 07:40:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-12-03 07:40:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-03 07:40:44,008 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:40:44,009 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:40:44,010 INFO L423 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 07:40:44,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:40:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1438395105, now seen corresponding path program 1 times [2018-12-03 07:40:44,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:40:44,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:40:44,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,051 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:40:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:40:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:40:44,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:40:44,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 07:40:44,115 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:40:44,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 07:40:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 07:40:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,127 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2018-12-03 07:40:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:40:44,161 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-12-03 07:40:44,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 07:40:44,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-03 07:40:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:40:44,168 INFO L225 Difference]: With dead ends: 60 [2018-12-03 07:40:44,168 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 07:40:44,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 07:40:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-12-03 07:40:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-03 07:40:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2018-12-03 07:40:44,194 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 9 [2018-12-03 07:40:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:40:44,194 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2018-12-03 07:40:44,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 07:40:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2018-12-03 07:40:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-03 07:40:44,195 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:40:44,195 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:40:44,195 INFO L423 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 07:40:44,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:40:44,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1438395167, now seen corresponding path program 1 times [2018-12-03 07:40:44,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:40:44,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:40:44,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,197 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:40:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:40:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:40:44,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:40:44,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 07:40:44,214 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:40:44,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 07:40:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 07:40:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,215 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 3 states. [2018-12-03 07:40:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:40:44,235 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-12-03 07:40:44,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 07:40:44,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-03 07:40:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:40:44,236 INFO L225 Difference]: With dead ends: 35 [2018-12-03 07:40:44,236 INFO L226 Difference]: Without dead ends: 33 [2018-12-03 07:40:44,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-03 07:40:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-12-03 07:40:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 07:40:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-03 07:40:44,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2018-12-03 07:40:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:40:44,239 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-03 07:40:44,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 07:40:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-03 07:40:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 07:40:44,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:40:44,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:40:44,240 INFO L423 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 07:40:44,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:40:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1640575335, now seen corresponding path program 1 times [2018-12-03 07:40:44,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:40:44,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:40:44,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,241 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:40:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:40:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:40:44,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:40:44,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 07:40:44,256 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:40:44,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 07:40:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 07:40:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,257 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2018-12-03 07:40:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:40:44,268 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-03 07:40:44,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 07:40:44,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-03 07:40:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:40:44,269 INFO L225 Difference]: With dead ends: 30 [2018-12-03 07:40:44,270 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 07:40:44,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 07:40:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 07:40:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-03 07:40:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-03 07:40:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-12-03 07:40:44,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2018-12-03 07:40:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:40:44,274 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-12-03 07:40:44,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 07:40:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-12-03 07:40:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-03 07:40:44,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:40:44,275 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:40:44,275 INFO L423 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 07:40:44,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:40:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1712546513, now seen corresponding path program 1 times [2018-12-03 07:40:44,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:40:44,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:40:44,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,277 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:40:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:40:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-03 07:40:44,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:40:44,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 07:40:44,344 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:40:44,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 07:40:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 07:40:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-03 07:40:44,344 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2018-12-03 07:40:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:40:44,369 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2018-12-03 07:40:44,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 07:40:44,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-12-03 07:40:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:40:44,370 INFO L225 Difference]: With dead ends: 28 [2018-12-03 07:40:44,370 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 07:40:44,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-03 07:40:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 07:40:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-03 07:40:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 07:40:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-12-03 07:40:44,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 29 [2018-12-03 07:40:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:40:44,373 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-12-03 07:40:44,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 07:40:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-12-03 07:40:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-03 07:40:44,373 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:40:44,374 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:40:44,374 INFO L423 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, build_nondet_StringErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, cstrncmpErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 07:40:44,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:40:44,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1549334281, now seen corresponding path program 1 times [2018-12-03 07:40:44,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:40:44,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:40:44,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:40:44,375 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:40:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 07:40:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 07:40:44,410 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 07:40:44,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:40:44 BoogieIcfgContainer [2018-12-03 07:40:44,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 07:40:44,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 07:40:44,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 07:40:44,430 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 07:40:44,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:40:43" (3/4) ... [2018-12-03 07:40:44,432 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-03 07:40:44,459 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cf467c53-3649-4bb4-8776-1353ea430e35/bin-2019/utaipan/witness.graphml [2018-12-03 07:40:44,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 07:40:44,460 INFO L168 Benchmark]: Toolchain (without parser) took 901.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 962.4 MB in the beginning and 1.1 GB in the end (delta: -91.0 MB). Peak memory consumption was 60.5 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,461 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:40:44,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.59 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.08 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:40:44,461 INFO L168 Benchmark]: Boogie Preprocessor took 49.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -191.9 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,462 INFO L168 Benchmark]: RCFGBuilder took 176.99 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,462 INFO L168 Benchmark]: TraceAbstraction took 491.13 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: 66.0 MB). Peak memory consumption was 66.0 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,462 INFO L168 Benchmark]: Witness Printer took 29.31 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-12-03 07:40:44,464 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.59 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.08 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -191.9 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 176.99 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 491.13 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: 66.0 MB). Peak memory consumption was 66.0 MB. Max. memory is 11.5 GB. * Witness Printer took 29.31 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: integer overflow possible integer overflow possible We found a FailurePath: [L47] CALL, EXPR build_nondet_String() [L13] int length = __VERIFIER_nondet_int(); [L14] COND TRUE length < 1 [L15] length = 1 VAL [length=1] [L17] EXPR length * sizeof(char) [L17] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=1, malloc(length * sizeof(char))={3:0}, nondetString={3:0}] [L18] EXPR length-1 [L18] nondetString[length-1] = '\0' [L19] return nondetString; VAL [\result={3:0}, length=1, malloc(length * sizeof(char))={3:0}, nondetString={3:0}] [L47] RET, EXPR build_nondet_String() VAL [build_nondet_String()={3:0}] [L47] CALL, EXPR build_nondet_String() [L13] int length = __VERIFIER_nondet_int(); [L14] COND TRUE length < 1 [L15] length = 1 VAL [length=1] [L17] EXPR length * sizeof(char) [L17] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=1, malloc(length * sizeof(char))={4:0}, nondetString={4:0}] [L18] EXPR length-1 [L18] nondetString[length-1] = '\0' [L19] return nondetString; VAL [\result={4:0}, length=1, malloc(length * sizeof(char))={4:0}, nondetString={4:0}] [L47] RET, EXPR build_nondet_String() VAL [build_nondet_String()={3:0}, build_nondet_String()={4:0}] [L47] CALL cstrncmp(build_nondet_String(),build_nondet_String(),__VERIFIER_nondet_int()) VAL [\old(n)=-2147483648, s1={3:0}, s2={4:0}] [L28] unsigned char uc1, uc2; VAL [\old(n)=-2147483648, n=-2147483648, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L30] COND FALSE !(n == 0) VAL [\old(n)=-2147483648, n=-2147483648, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L33] n-- VAL [\old(n)=-2147483648, n=-2147483648, n--=-2147483648, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 6 error locations. UNSAFE Result, 0.4s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 40 SDslu, 168 SDs, 0 SdLazy, 44 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 1357 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...