./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 31319b3dce926b7eddaa50d24c240f6870931f21 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-1dbac8b [2018-11-10 10:27:41,021 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 10:27:41,022 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 10:27:41,029 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 10:27:41,029 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 10:27:41,030 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 10:27:41,031 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 10:27:41,032 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 10:27:41,033 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 10:27:41,034 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 10:27:41,034 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 10:27:41,034 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 10:27:41,035 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 10:27:41,036 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 10:27:41,037 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 10:27:41,037 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 10:27:41,038 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 10:27:41,040 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 10:27:41,041 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 10:27:41,042 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 10:27:41,043 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 10:27:41,044 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 10:27:41,046 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 10:27:41,046 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 10:27:41,046 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 10:27:41,047 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 10:27:41,048 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 10:27:41,048 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 10:27:41,049 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 10:27:41,050 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 10:27:41,050 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 10:27:41,050 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 10:27:41,050 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 10:27:41,051 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 10:27:41,052 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 10:27:41,052 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 10:27:41,053 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 10:27:41,063 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 10:27:41,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 10:27:41,064 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 10:27:41,064 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 10:27:41,064 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 10:27:41,064 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 10:27:41,064 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 10:27:41,064 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 10:27:41,064 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 10:27:41,065 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 10:27:41,065 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 10:27:41,065 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 10:27:41,065 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 10:27:41,065 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 10:27:41,065 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 10:27:41,066 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 10:27:41,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 10:27:41,067 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 10:27:41,068 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 10:27:41,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 10:27:41,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:27:41,069 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 10:27:41,069 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 10:27:41,070 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_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 -> 31319b3dce926b7eddaa50d24c240f6870931f21 [2018-11-10 10:27:41,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 10:27:41,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 10:27:41,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 10:27:41,104 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 10:27:41,104 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 10:27:41,105 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c [2018-11-10 10:27:41,143 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/data/4efee4873/b49752e493794cd6b7b7da93922a2a8a/FLAG5995e68b7 [2018-11-10 10:27:41,528 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 10:27:41,529 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/sv-benchmarks/c/recursive-simple/sum_15x0_false-unreach-call_true-termination.c [2018-11-10 10:27:41,532 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/data/4efee4873/b49752e493794cd6b7b7da93922a2a8a/FLAG5995e68b7 [2018-11-10 10:27:41,541 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/data/4efee4873/b49752e493794cd6b7b7da93922a2a8a [2018-11-10 10:27:41,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 10:27:41,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 10:27:41,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 10:27:41,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 10:27:41,548 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 10:27:41,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f62aa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41, skipping insertion in model container [2018-11-10 10:27:41,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 10:27:41,566 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 10:27:41,669 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:27:41,671 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 10:27:41,681 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:27:41,690 INFO L193 MainTranslator]: Completed translation [2018-11-10 10:27:41,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41 WrapperNode [2018-11-10 10:27:41,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 10:27:41,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 10:27:41,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 10:27:41,691 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 10:27:41,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 10:27:41,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 10:27:41,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 10:27:41,703 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 10:27:41,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... [2018-11-10 10:27:41,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 10:27:41,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 10:27:41,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 10:27:41,715 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 10:27:41,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:41,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 10:27:41,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 10:27:41,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 10:27:41,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 10:27:41,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 10:27:41,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 10:27:41,793 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 10:27:41,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 10:27:41,889 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 10:27:41,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:27:41 BoogieIcfgContainer [2018-11-10 10:27:41,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 10:27:41,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 10:27:41,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 10:27:41,891 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 10:27:41,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:27:41" (1/3) ... [2018-11-10 10:27:41,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb93e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:27:41, skipping insertion in model container [2018-11-10 10:27:41,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:41" (2/3) ... [2018-11-10 10:27:41,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb93e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:27:41, skipping insertion in model container [2018-11-10 10:27:41,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:27:41" (3/3) ... [2018-11-10 10:27:41,894 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_false-unreach-call_true-termination.c [2018-11-10 10:27:41,902 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 10:27:41,906 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 10:27:41,915 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 10:27:41,933 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 10:27:41,934 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 10:27:41,934 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 10:27:41,934 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 10:27:41,934 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 10:27:41,934 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 10:27:41,934 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 10:27:41,934 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 10:27:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 10:27:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 10:27:41,954 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:41,954 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:41,956 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:41,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 10:27:41,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:42,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:42,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,004 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:27:42,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:27:42,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:27:42,095 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 10:27:42,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:27:42,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:27:42,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:27:42,107 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 10:27:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:42,172 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 10:27:42,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:27:42,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 10:27:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:42,180 INFO L225 Difference]: With dead ends: 30 [2018-11-10 10:27:42,180 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 10:27:42,183 INFO L605 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 [2018-11-10 10:27:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 10:27:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 10:27:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 10:27:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 10:27:42,212 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 10:27:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:42,213 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 10:27:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:27:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 10:27:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 10:27:42,214 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:42,215 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:42,215 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:42,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 10:27:42,215 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:42,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:42,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,216 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 10:27:42,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:42,277 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:42,278 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-10 10:27:42,279 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-11-10 10:27:42,312 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 10:27:42,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 10:27:42,460 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 10:27:42,461 INFO L272 AbstractInterpreter]: Visited 17 different actions 71 times. Never merged. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-11-10 10:27:42,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:42,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 10:27:42,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:42,479 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:42,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:42,486 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 10:27:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:42,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 10:27:42,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 10:27:42,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:42,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-11-10 10:27:42,691 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:42,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:27:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:27:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:27:42,692 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 10:27:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:42,728 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 10:27:42,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:27:42,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 10:27:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:42,730 INFO L225 Difference]: With dead ends: 25 [2018-11-10 10:27:42,730 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 10:27:42,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:27:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 10:27:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 10:27:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 10:27:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 10:27:42,735 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 10:27:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:42,735 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 10:27:42,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:27:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 10:27:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 10:27:42,736 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:42,736 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:42,736 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:42,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:42,737 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 10:27:42,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:42,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:42,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:42,738 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 10:27:42,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:42,805 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:42,806 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:42,806 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:42,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:42,806 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:42,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:27:42,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 10:27:42,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 10:27:42,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:42,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 10:27:42,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 10:27:43,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:43,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-11-10 10:27:43,070 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:43,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 10:27:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 10:27:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:27:43,071 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 10:27:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:43,138 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 10:27:43,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 10:27:43,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 10:27:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:43,139 INFO L225 Difference]: With dead ends: 28 [2018-11-10 10:27:43,139 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 10:27:43,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-10 10:27:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 10:27:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 10:27:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 10:27:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 10:27:43,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 10:27:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:43,143 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 10:27:43,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 10:27:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 10:27:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 10:27:43,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:43,144 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:43,144 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:43,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 10:27:43,144 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:43,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:43,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:43,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:43,145 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:27:43,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:43,220 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:43,220 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:43,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:43,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:43,220 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:43,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:27:43,228 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 10:27:43,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:27:43,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:43,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:27:43,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 10:27:43,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:43,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-11-10 10:27:43,557 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:43,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:27:43,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:27:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:27:43,557 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 10:27:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:43,606 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 10:27:43,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 10:27:43,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 10:27:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:43,607 INFO L225 Difference]: With dead ends: 31 [2018-11-10 10:27:43,607 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 10:27:43,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:27:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 10:27:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 10:27:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 10:27:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 10:27:43,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 10:27:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:43,611 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 10:27:43,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:27:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 10:27:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 10:27:43,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:43,612 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:43,612 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:43,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 10:27:43,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:43,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:43,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:43,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:43,613 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 10:27:43,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:43,696 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:43,697 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:43,697 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:43,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:43,697 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:43,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:43,705 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 10:27:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:43,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 10:27:43,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 10:27:44,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:44,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-11-10 10:27:44,131 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:44,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 10:27:44,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 10:27:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-10 10:27:44,132 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 10:27:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:44,189 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 10:27:44,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 10:27:44,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 10:27:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:44,191 INFO L225 Difference]: With dead ends: 34 [2018-11-10 10:27:44,191 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 10:27:44,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-11-10 10:27:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 10:27:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 10:27:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 10:27:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 10:27:44,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 10:27:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:44,196 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 10:27:44,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 10:27:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 10:27:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 10:27:44,197 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:44,197 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:44,197 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:44,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 10:27:44,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:44,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:44,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:44,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:44,198 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 10:27:44,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:44,253 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:44,253 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:44,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:44,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:44,253 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:44,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:27:44,258 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 10:27:44,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 10:27:44,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:44,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 10:27:44,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:27:44,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:44,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-11-10 10:27:44,994 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:44,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 10:27:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 10:27:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:27:44,995 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 10:27:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:45,053 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 10:27:45,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 10:27:45,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 10:27:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:45,054 INFO L225 Difference]: With dead ends: 37 [2018-11-10 10:27:45,054 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 10:27:45,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:27:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 10:27:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 10:27:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 10:27:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 10:27:45,060 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 10:27:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:45,060 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 10:27:45,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 10:27:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 10:27:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 10:27:45,061 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:45,062 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:45,062 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:45,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 10:27:45,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:45,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:45,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:45,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:45,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 10:27:45,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:45,129 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:45,129 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:45,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:45,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:45,130 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:45,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:27:45,139 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 10:27:45,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:27:45,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:45,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 10:27:45,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 10:27:45,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:45,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-11-10 10:27:45,964 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:45,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:27:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:27:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:27:45,965 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 10:27:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:46,025 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 10:27:46,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:27:46,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 10:27:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:46,026 INFO L225 Difference]: With dead ends: 40 [2018-11-10 10:27:46,026 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 10:27:46,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-11-10 10:27:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 10:27:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 10:27:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 10:27:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 10:27:46,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 10:27:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:46,030 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 10:27:46,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:27:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 10:27:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 10:27:46,031 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:46,031 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:46,031 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:46,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:46,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 10:27:46,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:46,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:46,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:46,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:46,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 10:27:46,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:46,095 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:46,096 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:46,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:46,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:46,096 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:46,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:46,102 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 10:27:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:46,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 10:27:46,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-10 10:27:47,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:47,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-11-10 10:27:47,225 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:47,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:27:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:27:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:27:47,226 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 10:27:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:47,313 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 10:27:47,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 10:27:47,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 10:27:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:47,314 INFO L225 Difference]: With dead ends: 43 [2018-11-10 10:27:47,315 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 10:27:47,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:27:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 10:27:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 10:27:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 10:27:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 10:27:47,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 10:27:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:47,319 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 10:27:47,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:27:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 10:27:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 10:27:47,320 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:47,320 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:47,320 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:47,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 10:27:47,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:47,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:47,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:47,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:47,321 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 10:27:47,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:47,399 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:47,399 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:47,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:47,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:47,399 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:47,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:27:47,404 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 10:27:47,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-10 10:27:47,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:47,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 10:27:47,437 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-10 10:27:48,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:48,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-11-10 10:27:48,966 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:48,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 10:27:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 10:27:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:27:48,967 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 10:27:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:49,058 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 10:27:49,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 10:27:49,058 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 10:27:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:49,059 INFO L225 Difference]: With dead ends: 46 [2018-11-10 10:27:49,059 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 10:27:49,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-11-10 10:27:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 10:27:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 10:27:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 10:27:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 10:27:49,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 10:27:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:49,065 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 10:27:49,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 10:27:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 10:27:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 10:27:49,066 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:49,066 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:49,067 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:49,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 10:27:49,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:49,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:49,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:49,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:49,070 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 10:27:49,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:49,161 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:49,161 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:49,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:49,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:49,161 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/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 [2018-11-10 10:27:49,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:27:49,166 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 10:27:49,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:27:49,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:49,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 10:27:49,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 10:27:51,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:51,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2018-11-10 10:27:51,193 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:51,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 10:27:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 10:27:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2018-11-10 10:27:51,194 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 10:27:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:51,270 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 10:27:51,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 10:27:51,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 10:27:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:51,271 INFO L225 Difference]: With dead ends: 49 [2018-11-10 10:27:51,271 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 10:27:51,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 10:27:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 10:27:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 10:27:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 10:27:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 10:27:51,275 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 10:27:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:51,275 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 10:27:51,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 10:27:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 10:27:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 10:27:51,275 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:51,276 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:51,276 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:51,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 10:27:51,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:51,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:51,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:51,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:51,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:27:51,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:51,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:51,380 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:51,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:51,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:51,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:27:51,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:51,388 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 10:27:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:51,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:27:51,425 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-10 10:27:53,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:53,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2018-11-10 10:27:53,955 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:53,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 10:27:53,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 10:27:53,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2018-11-10 10:27:53,956 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 10:27:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:54,055 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 10:27:54,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 10:27:54,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 10:27:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:54,056 INFO L225 Difference]: With dead ends: 52 [2018-11-10 10:27:54,056 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 10:27:54,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 10:27:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 10:27:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 10:27:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 10:27:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 10:27:54,060 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 10:27:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:54,060 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 10:27:54,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 10:27:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 10:27:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 10:27:54,061 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:54,061 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:54,061 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:54,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-10 10:27:54,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:54,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:54,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:27:54,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:54,062 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 10:27:54,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:54,207 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:54,207 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:54,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:54,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:54,208 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:27:54,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:27:54,216 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 10:27:54,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-10 10:27:54,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:54,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 10:27:54,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:27:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 10:27:57,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:27:57,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2018-11-10 10:27:57,585 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:27:57,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 10:27:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 10:27:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:27:57,586 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 10:27:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:27:57,719 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 10:27:57,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 10:27:57,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 10:27:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:27:57,720 INFO L225 Difference]: With dead ends: 55 [2018-11-10 10:27:57,720 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 10:27:57,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 10:27:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 10:27:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 10:27:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 10:27:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 10:27:57,724 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 10:27:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:27:57,725 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 10:27:57,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 10:27:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 10:27:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 10:27:57,725 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:27:57,726 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:27:57,726 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:27:57,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:27:57,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-10 10:27:57,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:27:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:57,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:27:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:27:57,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:27:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:27:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 10:27:57,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:57,830 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:27:57,830 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:27:57,830 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:27:57,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:27:57,830 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:27:57,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:27:57,844 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 10:27:57,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:27:57,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:27:57,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:27:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 10:27:57,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:28:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-10 10:28:02,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:28:02,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 31 [2018-11-10 10:28:02,118 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:28:02,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 10:28:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 10:28:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2018-11-10 10:28:02,119 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 10:28:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:28:02,252 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 10:28:02,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 10:28:02,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 10:28:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:28:02,253 INFO L225 Difference]: With dead ends: 58 [2018-11-10 10:28:02,253 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 10:28:02,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 143 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 10:28:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 10:28:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 10:28:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 10:28:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 10:28:02,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 10:28:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:28:02,258 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 10:28:02,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 10:28:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 10:28:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 10:28:02,259 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:28:02,259 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:28:02,259 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:28:02,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:28:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-10 10:28:02,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:28:02,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:02,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:28:02,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:02,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:28:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:28:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 10:28:02,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:28:02,374 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:28:02,374 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:28:02,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:28:02,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:28:02,374 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:28:02,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:28:02,379 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 10:28:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:28:02,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:28:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 10:28:02,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:28:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-11-10 10:28:07,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:28:07,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2018-11-10 10:28:07,564 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:28:07,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 10:28:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 10:28:07,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 10:28:07,565 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 10:28:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:28:07,689 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 10:28:07,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 10:28:07,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 10:28:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:28:07,690 INFO L225 Difference]: With dead ends: 61 [2018-11-10 10:28:07,690 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 10:28:07,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 10:28:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 10:28:07,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 10:28:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 10:28:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 10:28:07,695 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 10:28:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:28:07,695 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 10:28:07,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 10:28:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 10:28:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 10:28:07,696 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:28:07,696 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:28:07,696 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:28:07,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:28:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-10 10:28:07,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:28:07,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:07,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:28:07,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:07,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:28:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:28:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 10:28:07,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:28:07,896 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 10:28:07,896 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 10:28:07,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 10:28:07,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:28:07,896 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:28:07,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:28:07,902 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 10:28:07,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-10 10:28:07,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:28:07,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:28:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 10:28:07,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:28:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-10 10:28:14,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 10:28:14,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 34 [2018-11-10 10:28:14,244 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 10:28:14,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 10:28:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 10:28:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 10:28:14,245 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 10:28:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:28:14,423 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 10:28:14,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 10:28:14,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 10:28:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:28:14,424 INFO L225 Difference]: With dead ends: 64 [2018-11-10 10:28:14,424 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 10:28:14,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 163 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=1552, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 10:28:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 10:28:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 10:28:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 10:28:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 10:28:14,429 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 10:28:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:28:14,429 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 10:28:14,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 10:28:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 10:28:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 10:28:14,430 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:28:14,430 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:28:14,430 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:28:14,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:28:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-10 10:28:14,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 10:28:14,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:14,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:28:14,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:14,433 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 10:28:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:28:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:28:14,458 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 10:28:14,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:28:14 BoogieIcfgContainer [2018-11-10 10:28:14,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 10:28:14,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 10:28:14,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 10:28:14,487 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 10:28:14,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:27:41" (3/4) ... [2018-11-10 10:28:14,490 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 10:28:14,528 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_95ce4860-8ef4-4d2a-95d6-5898b3314a1f/bin-2019/utaipan/witness.graphml [2018-11-10 10:28:14,528 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 10:28:14,529 INFO L168 Benchmark]: Toolchain (without parser) took 32984.06 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 593.0 MB). Free memory was 954.8 MB in the beginning and 1.2 GB in the end (delta: -219.1 MB). Peak memory consumption was 373.8 MB. Max. memory is 11.5 GB. [2018-11-10 10:28:14,530 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:28:14,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.82 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 10:28:14,530 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.64 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:28:14,530 INFO L168 Benchmark]: Boogie Preprocessor took 11.41 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:28:14,530 INFO L168 Benchmark]: RCFGBuilder took 174.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 10:28:14,531 INFO L168 Benchmark]: TraceAbstraction took 32596.88 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 466.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -57.1 MB). Peak memory consumption was 409.5 MB. Max. memory is 11.5 GB. [2018-11-10 10:28:14,531 INFO L168 Benchmark]: Witness Printer took 41.16 ms. Allocated memory is still 1.6 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:28:14,533 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.82 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.64 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.41 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 174.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 32596.88 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 466.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -57.1 MB). Peak memory consumption was 409.5 MB. Max. memory is 11.5 GB. * Witness Printer took 41.16 ms. Allocated memory is still 1.6 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; VAL [a=15, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] RET return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] RET return sum(n - 1, m + 1); [L14] EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L16] __VERIFIER_error() VAL [a=15, b=0, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 32.5s OverallTime, 16 OverallIterations, 16 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 183 SDtfs, 318 SDslu, 1173 SDs, 0 SdLazy, 918 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2015 GetRequests, 1374 SyntacticMatches, 239 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1740 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 2406 ConstructedInterpolants, 0 QuantifiedInterpolants, 462912 SizeOfPredicates, 133 NumberOfNonLiveVariables, 2408 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 3710/9450 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...