./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 934ee9c856a834ce808d29dea79c6912619f897f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 02:44:54,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 02:44:54,945 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 02:44:54,952 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 02:44:54,953 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 02:44:54,953 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 02:44:54,954 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 02:44:54,956 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 02:44:54,957 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 02:44:54,957 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 02:44:54,958 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 02:44:54,958 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 02:44:54,959 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 02:44:54,960 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 02:44:54,961 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 02:44:54,961 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 02:44:54,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 02:44:54,963 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 02:44:54,964 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 02:44:54,965 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 02:44:54,966 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 02:44:54,967 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 02:44:54,968 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 02:44:54,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 02:44:54,969 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 02:44:54,969 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 02:44:54,970 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 02:44:54,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 02:44:54,972 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 02:44:54,973 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 02:44:54,973 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 02:44:54,973 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 02:44:54,974 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 02:44:54,974 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 02:44:54,974 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 02:44:54,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 02:44:54,976 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 02:44:54,986 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 02:44:54,986 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 02:44:54,987 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 02:44:54,987 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 02:44:54,987 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 02:44:54,987 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 02:44:54,987 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 02:44:54,987 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 02:44:54,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 02:44:54,988 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 02:44:54,989 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 02:44:54,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:44:54,990 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 02:44:54,990 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 02:44:54,991 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 02:44:54,992 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 02:44:54,992 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 02:44:54,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 02:44:54,993 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 02:44:54,993 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_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 -> 934ee9c856a834ce808d29dea79c6912619f897f [2018-11-23 02:44:55,016 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 02:44:55,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 02:44:55,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 02:44:55,027 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 02:44:55,027 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 02:44:55,028 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-23 02:44:55,063 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/data/ecbc5095e/7127da460ea54b189c71b99e58052910/FLAGd35430804 [2018-11-23 02:44:55,465 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 02:44:55,465 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-23 02:44:55,469 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/data/ecbc5095e/7127da460ea54b189c71b99e58052910/FLAGd35430804 [2018-11-23 02:44:55,481 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/data/ecbc5095e/7127da460ea54b189c71b99e58052910 [2018-11-23 02:44:55,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 02:44:55,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 02:44:55,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 02:44:55,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 02:44:55,489 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 02:44:55,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4044db79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55, skipping insertion in model container [2018-11-23 02:44:55,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 02:44:55,517 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 02:44:55,622 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:44:55,624 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 02:44:55,634 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:44:55,644 INFO L195 MainTranslator]: Completed translation [2018-11-23 02:44:55,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55 WrapperNode [2018-11-23 02:44:55,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 02:44:55,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 02:44:55,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 02:44:55,645 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 02:44:55,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 02:44:55,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 02:44:55,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 02:44:55,659 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 02:44:55,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... [2018-11-23 02:44:55,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 02:44:55,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 02:44:55,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 02:44:55,672 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 02:44:55,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 [2018-11-23 02:44:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 02:44:55,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 02:44:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 02:44:55,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 02:44:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 02:44:55,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 02:44:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 02:44:55,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 02:44:55,852 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 02:44:55,852 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-23 02:44:55,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:55 BoogieIcfgContainer [2018-11-23 02:44:55,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 02:44:55,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 02:44:55,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 02:44:55,856 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 02:44:55,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:55" (1/3) ... [2018-11-23 02:44:55,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1841826e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:55, skipping insertion in model container [2018-11-23 02:44:55,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:55" (2/3) ... [2018-11-23 02:44:55,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1841826e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:55, skipping insertion in model container [2018-11-23 02:44:55,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:55" (3/3) ... [2018-11-23 02:44:55,858 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-11-23 02:44:55,864 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 02:44:55,870 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 02:44:55,881 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 02:44:55,901 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 02:44:55,901 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 02:44:55,901 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 02:44:55,901 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 02:44:55,901 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 02:44:55,901 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 02:44:55,901 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 02:44:55,901 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 02:44:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-11-23 02:44:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 02:44:55,917 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:55,918 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:55,920 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:55,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:55,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1213508388, now seen corresponding path program 1 times [2018-11-23 02:44:55,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:55,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:55,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:55,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:55,954 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:44:56,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:44:56,052 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:44:56,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:44:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:44:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:44:56,064 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2018-11-23 02:44:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:56,161 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2018-11-23 02:44:56,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:44:56,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-23 02:44:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:56,169 INFO L225 Difference]: With dead ends: 57 [2018-11-23 02:44:56,169 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 02:44:56,172 INFO L631 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 [2018-11-23 02:44:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 02:44:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-23 02:44:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 02:44:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-11-23 02:44:56,201 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2018-11-23 02:44:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:56,201 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-11-23 02:44:56,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:44:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-11-23 02:44:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-23 02:44:56,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:56,202 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:56,203 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:56,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash 542305890, now seen corresponding path program 1 times [2018-11-23 02:44:56,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:56,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:56,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:44:56,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 02:44:56,268 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:44:56,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:44:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:44:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:44:56,269 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2018-11-23 02:44:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:56,387 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-11-23 02:44:56,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:44:56,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-11-23 02:44:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:56,388 INFO L225 Difference]: With dead ends: 40 [2018-11-23 02:44:56,388 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 02:44:56,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:44:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 02:44:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-11-23 02:44:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 02:44:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-11-23 02:44:56,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2018-11-23 02:44:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:56,395 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-11-23 02:44:56,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:44:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-11-23 02:44:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 02:44:56,396 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:56,396 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:56,396 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:56,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:56,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1063580357, now seen corresponding path program 1 times [2018-11-23 02:44:56,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:56,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:56,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,398 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:56,461 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 02:44:56,462 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-23 02:44:56,464 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [31], [50], [64], [67], [69], [72], [74], [75], [76], [77], [81], [82], [83] [2018-11-23 02:44:56,488 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 02:44:56,488 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 02:44:56,579 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 02:44:56,580 INFO L272 AbstractInterpreter]: Visited 19 different actions 24 times. Never merged. Never widened. Performed 46 root evaluator evaluations with a maximum evaluation depth of 3. Performed 46 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 7 variables. [2018-11-23 02:44:56,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:56,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 02:44:56,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:56,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 [2018-11-23 02:44:56,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:56,592 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 02:44:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:44:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:44:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,684 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 02:44:56,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-11-23 02:44:56,684 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:44:56,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:44:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:44:56,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:44:56,685 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2018-11-23 02:44:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:56,717 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-11-23 02:44:56,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:44:56,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-23 02:44:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:56,718 INFO L225 Difference]: With dead ends: 45 [2018-11-23 02:44:56,718 INFO L226 Difference]: Without dead ends: 43 [2018-11-23 02:44:56,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-23 02:44:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-23 02:44:56,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-23 02:44:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-23 02:44:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2018-11-23 02:44:56,723 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2018-11-23 02:44:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:56,724 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2018-11-23 02:44:56,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:44:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2018-11-23 02:44:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-23 02:44:56,724 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:56,725 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:56,725 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:56,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1462671860, now seen corresponding path program 1 times [2018-11-23 02:44:56,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:56,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:56,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:56,726 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:56,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:56,797 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 02:44:56,797 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-23 02:44:56,797 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [31], [34], [40], [50], [54], [64], [67], [69], [72], [74], [75], [76], [77], [81], [82], [83] [2018-11-23 02:44:56,798 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 02:44:56,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 02:44:56,873 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 02:44:56,873 INFO L272 AbstractInterpreter]: Visited 22 different actions 81 times. Merged at 6 different actions 18 times. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 3. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-23 02:44:56,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:56,875 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 02:44:56,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:56,876 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 [2018-11-23 02:44:56,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:56,886 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 02:44:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:56,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:44:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 02:44:56,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:44:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:44:57,003 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 02:44:57,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 10 [2018-11-23 02:44:57,003 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:44:57,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:44:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:44:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-23 02:44:57,004 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2018-11-23 02:44:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:57,101 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2018-11-23 02:44:57,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:44:57,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-23 02:44:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:57,102 INFO L225 Difference]: With dead ends: 106 [2018-11-23 02:44:57,102 INFO L226 Difference]: Without dead ends: 71 [2018-11-23 02:44:57,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-23 02:44:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-23 02:44:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2018-11-23 02:44:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-23 02:44:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2018-11-23 02:44:57,110 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2018-11-23 02:44:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:57,110 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2018-11-23 02:44:57,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:44:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2018-11-23 02:44:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-23 02:44:57,111 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:57,111 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:57,111 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:57,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:57,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1830678608, now seen corresponding path program 1 times [2018-11-23 02:44:57,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:57,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:57,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:57,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:57,112 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:44:57,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:57,164 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 02:44:57,165 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-23 02:44:57,165 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [31], [34], [40], [42], [45], [50], [54], [64], [67], [69], [72], [74], [75], [76], [77], [79], [80], [81], [82], [83] [2018-11-23 02:44:57,166 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 02:44:57,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 02:44:57,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 02:44:57,243 INFO L272 AbstractInterpreter]: Visited 26 different actions 128 times. Merged at 9 different actions 28 times. Widened at 1 different actions 1 times. Performed 282 root evaluator evaluations with a maximum evaluation depth of 4. Performed 282 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 6 fixpoints after 2 different actions. Largest state had 9 variables. [2018-11-23 02:44:57,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:57,256 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 02:44:57,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:57,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 [2018-11-23 02:44:57,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:57,264 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 02:44:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:57,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:44:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 02:44:57,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:44:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:44:57,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 02:44:57,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2018-11-23 02:44:57,366 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 02:44:57,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 02:44:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 02:44:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:44:57,367 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2018-11-23 02:44:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:57,552 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2018-11-23 02:44:57,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 02:44:57,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-23 02:44:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:57,555 INFO L225 Difference]: With dead ends: 91 [2018-11-23 02:44:57,555 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 02:44:57,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-11-23 02:44:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 02:44:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-11-23 02:44:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-23 02:44:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2018-11-23 02:44:57,567 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 31 [2018-11-23 02:44:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:57,568 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2018-11-23 02:44:57,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 02:44:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2018-11-23 02:44:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 02:44:57,569 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:44:57,569 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:44:57,571 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:44:57,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1032911483, now seen corresponding path program 1 times [2018-11-23 02:44:57,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:44:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:57,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:57,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:44:57,573 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:44:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 02:44:57,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:57,673 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 02:44:57,674 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-11-23 02:44:57,674 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [29], [31], [34], [40], [50], [54], [58], [64], [67], [69], [72], [74], [75], [76], [77], [81], [82], [83], [84] [2018-11-23 02:44:57,675 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 02:44:57,675 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 02:44:57,722 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 02:44:57,723 INFO L272 AbstractInterpreter]: Visited 25 different actions 95 times. Merged at 9 different actions 23 times. Widened at 1 different actions 1 times. Performed 230 root evaluator evaluations with a maximum evaluation depth of 3. Performed 230 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 9 fixpoints after 3 different actions. Largest state had 9 variables. [2018-11-23 02:44:57,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:44:57,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 02:44:57,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:44:57,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/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 [2018-11-23 02:44:57,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:44:57,733 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 02:44:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:44:57,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:44:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-23 02:44:57,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:44:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-23 02:44:57,784 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 02:44:57,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [13] total 14 [2018-11-23 02:44:57,784 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:44:57,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 02:44:57,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 02:44:57,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-23 02:44:57,785 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 4 states. [2018-11-23 02:44:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:44:57,820 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2018-11-23 02:44:57,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 02:44:57,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-11-23 02:44:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:44:57,821 INFO L225 Difference]: With dead ends: 91 [2018-11-23 02:44:57,821 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 02:44:57,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-11-23 02:44:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 02:44:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 02:44:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 02:44:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 02:44:57,823 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2018-11-23 02:44:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:44:57,823 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 02:44:57,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 02:44:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 02:44:57,823 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 02:44:57,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 02:44:57,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 02:44:57,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 02:44:57,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 02:44:57,976 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 02:44:57,976 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:44:57,976 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:44:57,976 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 02:44:57,976 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 02:44:57,976 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 02:44:57,977 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-23 02:44:57,977 INFO L444 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-23 02:44:57,977 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-11-23 02:44:57,977 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0))) [2018-11-23 02:44:57,977 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2018-11-23 02:44:57,977 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 31) no Hoare annotation was computed. [2018-11-23 02:44:57,977 INFO L444 ceAbstractionStarter]: At program point L19-3(lines 19 31) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 (<= main_~i~0 0) .cse1) (and .cse0 .cse1 (<= main_~n~0 main_~j~0)))) [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point L15-1(lines 15 18) no Hoare annotation was computed. [2018-11-23 02:44:57,978 INFO L451 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-11-23 02:44:57,978 INFO L444 ceAbstractionStarter]: At program point L20-2(lines 20 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-11-23 02:44:57,978 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-11-23 02:44:57,978 INFO L444 ceAbstractionStarter]: At program point L22-2(lines 22 24) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0))) [2018-11-23 02:44:57,978 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-23 02:44:57,979 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 02:44:57,979 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 02:44:57,979 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 02:44:57,979 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 02:44:57,979 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 02:44:57,979 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 02:44:57,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:44:57 BoogieIcfgContainer [2018-11-23 02:44:57,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 02:44:57,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 02:44:57,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 02:44:57,988 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 02:44:57,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:55" (3/4) ... [2018-11-23 02:44:57,991 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 02:44:57,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 02:44:57,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 02:44:57,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 02:44:57,998 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-23 02:44:57,999 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-23 02:44:57,999 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 02:44:57,999 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 02:44:58,029 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_468996ee-edff-428f-bc5d-c377f3b8e7e2/bin-2019/utaipan/witness.graphml [2018-11-23 02:44:58,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 02:44:58,030 INFO L168 Benchmark]: Toolchain (without parser) took 2545.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 958.1 MB in the beginning and 807.9 MB in the end (delta: 150.1 MB). Peak memory consumption was 288.0 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,031 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:44:58,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.09 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.63 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,032 INFO L168 Benchmark]: Boogie Preprocessor took 12.99 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:44:58,032 INFO L168 Benchmark]: RCFGBuilder took 181.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,032 INFO L168 Benchmark]: TraceAbstraction took 2134.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 810.7 MB in the end (delta: 307.2 MB). Peak memory consumption was 307.2 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,032 INFO L168 Benchmark]: Witness Printer took 41.07 ms. Allocated memory is still 1.2 GB. Free memory was 810.7 MB in the beginning and 807.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2018-11-23 02:44:58,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 159.09 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 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 13.63 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.99 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -173.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2134.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 810.7 MB in the end (delta: 307.2 MB). Peak memory consumption was 307.2 MB. Max. memory is 11.5 GB. * Witness Printer took 41.07 ms. Allocated memory is still 1.2 GB. Free memory was 810.7 MB in the beginning and 807.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (2 * i <= j && k <= n) && n <= k - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= j) && 2 * i <= k) && k <= n - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((k <= n && i <= 0) && n <= k) || ((k <= n && n <= k) && n <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 153 SDtfs, 98 SDslu, 397 SDs, 0 SdLazy, 360 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 293 GetRequests, 227 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 34 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 34 PreInvPairs, 52 NumberOfFragments, 108 HoareAnnotationTreeSize, 34 FomulaSimplifications, 908 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 164 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 362 ConstructedInterpolants, 3 QuantifiedInterpolants, 20104 SizeOfPredicates, 14 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 116/144 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...