./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:16:03,955 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:16:03,956 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:16:03,963 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:16:03,963 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:16:03,964 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:16:03,965 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:16:03,966 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:16:03,967 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:16:03,967 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:16:03,968 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:16:03,968 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:16:03,969 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:16:03,970 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:16:03,970 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:16:03,971 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:16:03,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:16:03,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:16:03,974 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:16:03,975 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:16:03,976 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:16:03,976 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:16:03,978 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:16:03,978 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:16:03,978 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:16:03,979 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:16:03,979 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:16:03,980 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:16:03,981 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:16:03,981 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:16:03,981 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:16:03,982 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:16:03,982 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:16:03,982 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:16:03,983 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:16:03,983 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:16:03,984 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:16:03,991 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:16:03,991 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:16:03,992 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:16:03,992 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:16:03,993 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:16:03,993 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:16:03,994 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:16:03,994 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:16:03,994 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:16:03,994 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:16:03,995 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:16:03,996 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:16:03,996 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:16:03,997 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:16:03,997 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:16:03,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:16:03,998 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:16:03,998 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_27b4a273-d50e-457c-9449-81423a56f538/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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5bec83c84f47b7653d49cdbe6bc7857a2bc0080 [2018-11-18 11:16:04,020 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:16:04,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:16:04,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:16:04,033 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:16:04,033 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:16:04,034 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i [2018-11-18 11:16:04,071 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/data/dd16fa5cf/9dcd53ad688942889327a1ac3c9f2b92/FLAGf1a7ae31c [2018-11-18 11:16:04,460 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:16:04,460 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/sv-benchmarks/c/loops/sum03_false-unreach-call_true-termination.i [2018-11-18 11:16:04,464 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/data/dd16fa5cf/9dcd53ad688942889327a1ac3c9f2b92/FLAGf1a7ae31c [2018-11-18 11:16:04,474 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/data/dd16fa5cf/9dcd53ad688942889327a1ac3c9f2b92 [2018-11-18 11:16:04,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:16:04,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:16:04,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:16:04,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:16:04,479 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:16:04,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4546e68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04, skipping insertion in model container [2018-11-18 11:16:04,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:16:04,499 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:16:04,597 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:16:04,599 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:16:04,608 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:16:04,617 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:16:04,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04 WrapperNode [2018-11-18 11:16:04,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:16:04,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:16:04,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:16:04,618 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:16:04,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:16:04,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:16:04,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:16:04,631 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:16:04,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... [2018-11-18 11:16:04,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:16:04,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:16:04,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:16:04,644 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:16:04,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/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 [2018-11-18 11:16:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:16:04,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:16:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:16:04,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:16:04,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:16:04,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:16:04,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:16:04,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:16:04,821 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:16:04,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:16:04 BoogieIcfgContainer [2018-11-18 11:16:04,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:16:04,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:16:04,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:16:04,824 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:16:04,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:16:04" (1/3) ... [2018-11-18 11:16:04,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d43ab13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:16:04, skipping insertion in model container [2018-11-18 11:16:04,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:16:04" (2/3) ... [2018-11-18 11:16:04,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d43ab13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:16:04, skipping insertion in model container [2018-11-18 11:16:04,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:16:04" (3/3) ... [2018-11-18 11:16:04,827 INFO L112 eAbstractionObserver]: Analyzing ICFG sum03_false-unreach-call_true-termination.i [2018-11-18 11:16:04,836 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:16:04,842 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:16:04,856 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:16:04,884 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:16:04,884 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:16:04,884 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:16:04,884 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:16:04,884 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:16:04,884 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:16:04,885 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:16:04,885 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:16:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 11:16:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 11:16:04,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:04,905 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:04,907 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:04,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:04,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1231955355, now seen corresponding path program 1 times [2018-11-18 11:16:04,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:04,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:04,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:04,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:04,956 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:16:05,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:16:05,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 11:16:05,109 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:16:05,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:16:05,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:16:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:16:05,127 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2018-11-18 11:16:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:05,210 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2018-11-18 11:16:05,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:16:05,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-18 11:16:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:05,216 INFO L225 Difference]: With dead ends: 41 [2018-11-18 11:16:05,216 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 11:16:05,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:16:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 11:16:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-18 11:16:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 11:16:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-18 11:16:05,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-11-18 11:16:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:05,243 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-18 11:16:05,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:16:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-18 11:16:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 11:16:05,244 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:05,244 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:05,244 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:05,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1174697053, now seen corresponding path program 1 times [2018-11-18 11:16:05,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,246 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:16:05,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:16:05,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:16:05,291 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:16:05,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:16:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:16:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:16:05,292 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-11-18 11:16:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:05,326 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-11-18 11:16:05,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:16:05,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 11:16:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:05,328 INFO L225 Difference]: With dead ends: 39 [2018-11-18 11:16:05,328 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 11:16:05,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:16:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 11:16:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-18 11:16:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 11:16:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-11-18 11:16:05,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 13 [2018-11-18 11:16:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:05,335 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-11-18 11:16:05,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:16:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-11-18 11:16:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 11:16:05,336 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:05,336 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:05,336 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:05,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -494238111, now seen corresponding path program 1 times [2018-11-18 11:16:05,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:05,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,338 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:16:05,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:05,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:05,403 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-11-18 11:16:05,404 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [17], [19], [21], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43] [2018-11-18 11:16:05,426 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:16:05,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:16:05,537 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:16:05,538 INFO L272 AbstractInterpreter]: Visited 17 different actions 39 times. Merged at 5 different actions 10 times. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 7. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 2 fixpoints after 2 different actions. Largest state had 7 variables. [2018-11-18 11:16:05,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:05,544 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:16:05,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:05,544 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:05,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:05,551 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:16:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:05,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:16:05,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:16:05,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:05,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 11:16:05,654 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:05,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:16:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:16:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:16:05,655 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2018-11-18 11:16:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:05,675 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-11-18 11:16:05,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 11:16:05,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 11:16:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:05,676 INFO L225 Difference]: With dead ends: 54 [2018-11-18 11:16:05,676 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 11:16:05,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:16:05,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 11:16:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 11:16:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 11:16:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-11-18 11:16:05,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2018-11-18 11:16:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:05,684 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-11-18 11:16:05,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:16:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-11-18 11:16:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:16:05,686 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:05,686 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:05,686 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:05,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2135506589, now seen corresponding path program 2 times [2018-11-18 11:16:05,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:05,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:16:05,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:05,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:05,773 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:05,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:05,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:05,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:05,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:16:05,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:16:05,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 11:16:05,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:05,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:16:05,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:16:05,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:05,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 11:16:05,970 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:05,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:16:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:16:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:16:05,971 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 6 states. [2018-11-18 11:16:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:05,997 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-11-18 11:16:05,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:16:05,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-11-18 11:16:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:05,998 INFO L225 Difference]: With dead ends: 50 [2018-11-18 11:16:05,998 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 11:16:05,999 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:16:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 11:16:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-18 11:16:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 11:16:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-11-18 11:16:06,004 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 31 [2018-11-18 11:16:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:06,004 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2018-11-18 11:16:06,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:16:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2018-11-18 11:16:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 11:16:06,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:06,005 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:06,006 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:06,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash -374355807, now seen corresponding path program 3 times [2018-11-18 11:16:06,006 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:06,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:06,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,007 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 11:16:06,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,091 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:06,092 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:06,092 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:06,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:06,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:16:06,103 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:16:06,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:16:06,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:06,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 11:16:06,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 11:16:06,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:06,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-18 11:16:06,238 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:06,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 11:16:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 11:16:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:16:06,239 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2018-11-18 11:16:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:06,284 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-11-18 11:16:06,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:16:06,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2018-11-18 11:16:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:06,286 INFO L225 Difference]: With dead ends: 55 [2018-11-18 11:16:06,287 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 11:16:06,287 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:16:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 11:16:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-11-18 11:16:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 11:16:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-11-18 11:16:06,293 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2018-11-18 11:16:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:06,294 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-11-18 11:16:06,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 11:16:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-11-18 11:16:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 11:16:06,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:06,295 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:06,295 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:06,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1263007965, now seen corresponding path program 4 times [2018-11-18 11:16:06,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:06,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:06,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,297 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 11:16:06,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:06,390 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:06,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:06,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:06,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:06,400 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:16:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:06,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 11:16:06,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 11:16:06,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:06,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 11:16:06,547 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:06,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 11:16:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 11:16:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:16:06,548 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 8 states. [2018-11-18 11:16:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:06,592 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2018-11-18 11:16:06,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 11:16:06,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2018-11-18 11:16:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:06,593 INFO L225 Difference]: With dead ends: 60 [2018-11-18 11:16:06,593 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 11:16:06,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:16:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 11:16:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-11-18 11:16:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 11:16:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2018-11-18 11:16:06,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 49 [2018-11-18 11:16:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:06,599 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2018-11-18 11:16:06,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 11:16:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2018-11-18 11:16:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 11:16:06,600 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:06,600 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:06,600 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:06,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1453262111, now seen corresponding path program 5 times [2018-11-18 11:16:06,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:06,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:06,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:06,602 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 11:16:06,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,724 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:06,724 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:06,725 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:06,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:06,725 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:06,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:16:06,732 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:16:07,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 11:16:07,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:07,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 11:16:07,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 11:16:07,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:07,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 11:16:07,521 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:07,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 11:16:07,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 11:16:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:16:07,522 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 9 states. [2018-11-18 11:16:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:07,575 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2018-11-18 11:16:07,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 11:16:07,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2018-11-18 11:16:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:07,576 INFO L225 Difference]: With dead ends: 65 [2018-11-18 11:16:07,576 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 11:16:07,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:16:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 11:16:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-11-18 11:16:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 11:16:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2018-11-18 11:16:07,582 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 58 [2018-11-18 11:16:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:07,582 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2018-11-18 11:16:07,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 11:16:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2018-11-18 11:16:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 11:16:07,584 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:07,584 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:07,584 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:07,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1989893347, now seen corresponding path program 6 times [2018-11-18 11:16:07,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:07,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:07,585 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 24 proven. 93 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:16:07,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:07,671 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:07,671 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:07,671 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:07,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:07,671 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:07,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:16:07,678 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:16:07,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:16:07,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:07,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 24 proven. 93 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:16:07,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 24 proven. 93 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-18 11:16:07,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:07,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-18 11:16:07,883 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:07,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 11:16:07,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 11:16:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-11-18 11:16:07,883 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 10 states. [2018-11-18 11:16:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:07,983 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2018-11-18 11:16:07,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 11:16:07,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2018-11-18 11:16:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:07,985 INFO L225 Difference]: With dead ends: 70 [2018-11-18 11:16:07,985 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 11:16:07,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-11-18 11:16:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 11:16:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-11-18 11:16:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 11:16:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2018-11-18 11:16:07,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 67 [2018-11-18 11:16:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:07,993 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2018-11-18 11:16:07,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 11:16:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2018-11-18 11:16:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-18 11:16:07,994 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:07,994 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:07,994 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:07,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -259908319, now seen corresponding path program 7 times [2018-11-18 11:16:07,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:07,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:07,995 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 126 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 11:16:08,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:08,084 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:08,084 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:08,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:08,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:08,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:08,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:08,094 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:16:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:08,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 126 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 11:16:08,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 126 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 11:16:08,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:08,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-11-18 11:16:08,270 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 11:16:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 11:16:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-11-18 11:16:08,271 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2018-11-18 11:16:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:08,377 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2018-11-18 11:16:08,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 11:16:08,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2018-11-18 11:16:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:08,378 INFO L225 Difference]: With dead ends: 75 [2018-11-18 11:16:08,378 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 11:16:08,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-11-18 11:16:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 11:16:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2018-11-18 11:16:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 11:16:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2018-11-18 11:16:08,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 76 [2018-11-18 11:16:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:08,384 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2018-11-18 11:16:08,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 11:16:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2018-11-18 11:16:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 11:16:08,385 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:08,386 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:08,386 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:08,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2013053603, now seen corresponding path program 8 times [2018-11-18 11:16:08,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:08,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:08,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:16:08,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:08,389 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 32 proven. 164 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-11-18 11:16:08,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:08,525 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:08,525 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:08,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:08,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:08,525 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:08,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:16:08,542 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:16:10,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-18 11:16:10,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:10,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 32 proven. 164 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-11-18 11:16:10,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 32 proven. 164 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-11-18 11:16:13,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:13,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12] total 29 [2018-11-18 11:16:13,116 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 11:16:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 11:16:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=579, Unknown=1, NotChecked=0, Total=812 [2018-11-18 11:16:13,116 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 19 states. [2018-11-18 11:16:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:13,321 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2018-11-18 11:16:13,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 11:16:13,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2018-11-18 11:16:13,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:13,323 INFO L225 Difference]: With dead ends: 80 [2018-11-18 11:16:13,323 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 11:16:13,324 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=232, Invalid=579, Unknown=1, NotChecked=0, Total=812 [2018-11-18 11:16:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 11:16:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-11-18 11:16:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 11:16:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2018-11-18 11:16:13,330 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 85 [2018-11-18 11:16:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:13,330 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2018-11-18 11:16:13,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 11:16:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2018-11-18 11:16:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-18 11:16:13,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:13,332 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:13,332 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:13,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 485961569, now seen corresponding path program 9 times [2018-11-18 11:16:13,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:13,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:13,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:13,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:13,333 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:16:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 36 proven. 207 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-11-18 11:16:13,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:13,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:16:13,503 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:16:13,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:16:13,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:16:13,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:16:13,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:16:13,512 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:16:13,533 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:16:13,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:16:13,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:16:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 36 proven. 207 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-11-18 11:16:13,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:16:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 36 proven. 207 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-11-18 11:16:13,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:16:13,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-18 11:16:13,798 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:16:13,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 11:16:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 11:16:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-11-18 11:16:13,799 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 13 states. [2018-11-18 11:16:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:16:13,924 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2018-11-18 11:16:13,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 11:16:13,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2018-11-18 11:16:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:16:13,925 INFO L225 Difference]: With dead ends: 85 [2018-11-18 11:16:13,925 INFO L226 Difference]: Without dead ends: 74 [2018-11-18 11:16:13,926 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-11-18 11:16:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-18 11:16:13,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-11-18 11:16:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-18 11:16:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2018-11-18 11:16:13,931 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 94 [2018-11-18 11:16:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:16:13,932 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2018-11-18 11:16:13,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 11:16:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2018-11-18 11:16:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 11:16:13,933 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:16:13,933 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:16:13,933 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:16:13,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:16:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1149749149, now seen corresponding path program 10 times [2018-11-18 11:16:13,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:16:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:13,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:16:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:16:13,934 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:16:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:16:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:16:14,009 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 11:16:14,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:16:14 BoogieIcfgContainer [2018-11-18 11:16:14,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:16:14,045 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:16:14,045 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:16:14,045 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:16:14,046 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:16:04" (3/4) ... [2018-11-18 11:16:14,048 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 11:16:14,099 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_27b4a273-d50e-457c-9449-81423a56f538/bin-2019/utaipan/witness.graphml [2018-11-18 11:16:14,099 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:16:14,100 INFO L168 Benchmark]: Toolchain (without parser) took 9623.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 197.1 MB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -231.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:16:14,101 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:16:14,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.68 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:16:14,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.18 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:16:14,101 INFO L168 Benchmark]: Boogie Preprocessor took 13.03 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:16:14,102 INFO L168 Benchmark]: RCFGBuilder took 177.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:16:14,102 INFO L168 Benchmark]: TraceAbstraction took 9223.14 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -52.9 MB). Peak memory consumption was 298.6 MB. Max. memory is 11.5 GB. [2018-11-18 11:16:14,102 INFO L168 Benchmark]: Witness Printer took 54.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. [2018-11-18 11:16:14,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.68 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 12.18 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.03 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 177.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9223.14 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -52.9 MB). Peak memory consumption was 298.6 MB. Max. memory is 11.5 GB. * Witness Printer took 54.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int sn=0; [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L11] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L12] unsigned int x=0; VAL [loop1=2, n1=3, sn=0, x=0] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=0, x=0] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=2, x=0] [L17] x++ VAL [loop1=2, n1=3, sn=2, x=1] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=2, x=1] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=2, x=1] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=4, x=1] [L17] x++ VAL [loop1=2, n1=3, sn=4, x=2] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=4, x=2] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=4, x=2] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=6, x=2] [L17] x++ VAL [loop1=2, n1=3, sn=6, x=3] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=6, x=3] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=6, x=3] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=8, x=3] [L17] x++ VAL [loop1=2, n1=3, sn=8, x=4] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=8, x=4] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=8, x=4] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=10, x=4] [L17] x++ VAL [loop1=2, n1=3, sn=10, x=5] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=10, x=5] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=10, x=5] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=12, x=5] [L17] x++ VAL [loop1=2, n1=3, sn=12, x=6] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=12, x=6] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=12, x=6] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=14, x=6] [L17] x++ VAL [loop1=2, n1=3, sn=14, x=7] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=14, x=7] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=14, x=7] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=16, x=7] [L17] x++ VAL [loop1=2, n1=3, sn=16, x=8] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=16, x=8] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=16, x=8] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=18, x=8] [L17] x++ VAL [loop1=2, n1=3, sn=18, x=9] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=18, x=9] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=18, x=9] [L14] COND TRUE x<10 [L15] sn = sn + (2) VAL [loop1=2, n1=3, sn=20, x=9] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=10] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L3] COND FALSE, RET !(!(cond)) VAL [\old(cond)=1, cond=1] [L18] __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=2, n1=3, sn=20, x=10] [L13] COND TRUE 1 VAL [loop1=2, n1=3, sn=20, x=10] [L14] COND FALSE !(x<10) VAL [loop1=2, n1=3, sn=20, x=10] [L17] x++ VAL [loop1=2, n1=3, sn=20, x=11] [L18] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 9.1s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 65 SDslu, 1578 SDs, 0 SdLazy, 1311 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1130 GetRequests, 976 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 10 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1173 NumberOfCodeBlocks, 1173 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 439575 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1008 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 1980/4185 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...