./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-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_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 e05793781d8e05fe8376a30b6751438f3b1a9d08 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:44:53,050 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:44:53,051 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:44:53,058 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:44:53,058 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:44:53,059 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:44:53,060 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:44:53,061 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:44:53,062 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:44:53,062 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:44:53,063 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:44:53,063 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:44:53,064 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:44:53,064 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:44:53,065 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:44:53,066 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:44:53,066 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:44:53,067 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:44:53,069 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:44:53,070 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:44:53,071 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:44:53,071 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:44:53,073 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:44:53,073 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:44:53,073 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:44:53,074 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:44:53,074 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:44:53,075 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:44:53,075 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:44:53,076 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:44:53,076 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:44:53,077 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:44:53,077 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:44:53,077 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:44:53,078 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:44:53,078 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:44:53,079 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 04:44:53,088 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:44:53,088 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:44:53,089 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:44:53,089 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:44:53,089 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:44:53,089 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:44:53,089 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:44:53,089 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:44:53,090 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:44:53,090 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:44:53,090 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:44:53,090 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:44:53,090 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:44:53,091 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:44:53,092 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:44:53,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:44:53,093 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:44:53,093 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 04:44:53,093 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_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 -> e05793781d8e05fe8376a30b6751438f3b1a9d08 [2018-11-10 04:44:53,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:44:53,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:44:53,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:44:53,128 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:44:53,129 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:44:53,129 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-11-10 04:44:53,165 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/data/18534d0c1/f149d64a8241459bbfed96e284eba60c/FLAG26aee748b [2018-11-10 04:44:53,565 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:44:53,566 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-11-10 04:44:53,570 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/data/18534d0c1/f149d64a8241459bbfed96e284eba60c/FLAG26aee748b [2018-11-10 04:44:53,578 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/data/18534d0c1/f149d64a8241459bbfed96e284eba60c [2018-11-10 04:44:53,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:44:53,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:44:53,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:44:53,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:44:53,584 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:44:53,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0d3238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53, skipping insertion in model container [2018-11-10 04:44:53,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:44:53,606 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:44:53,696 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:44:53,698 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:44:53,707 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:44:53,715 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:44:53,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53 WrapperNode [2018-11-10 04:44:53,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:44:53,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:44:53,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:44:53,716 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:44:53,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:44:53,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:44:53,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:44:53,727 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:44:53,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... [2018-11-10 04:44:53,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:44:53,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:44:53,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:44:53,737 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:44:53,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 04:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:44:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:44:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:44:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 04:44:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 04:44:53,888 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:44:53,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:53 BoogieIcfgContainer [2018-11-10 04:44:53,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:44:53,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:44:53,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:44:53,891 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:44:53,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:44:53" (1/3) ... [2018-11-10 04:44:53,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314abf34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:44:53, skipping insertion in model container [2018-11-10 04:44:53,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:53" (2/3) ... [2018-11-10 04:44:53,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314abf34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:44:53, skipping insertion in model container [2018-11-10 04:44:53,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:53" (3/3) ... [2018-11-10 04:44:53,893 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i5_o5_true-unreach-call_true-termination.c [2018-11-10 04:44:53,900 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:44:53,905 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 04:44:53,913 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 04:44:53,935 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:44:53,935 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:44:53,936 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:44:53,936 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:44:53,936 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:44:53,936 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:44:53,936 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:44:53,936 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:44:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 04:44:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:44:53,954 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:53,955 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:53,957 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:53,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 04:44:53,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:53,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:53,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:53,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:53,992 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:54,077 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 04:44:54,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:44:54,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 04:44:54,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:54,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 04:44:54,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 04:44:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:44:54,096 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 04:44:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:54,156 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 04:44:54,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:44:54,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 04:44:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:54,165 INFO L225 Difference]: With dead ends: 30 [2018-11-10 04:44:54,165 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 04:44:54,167 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 04:44:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 04:44:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 04:44:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 04:44:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 04:44:54,193 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 04:44:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:54,193 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 04:44:54,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 04:44:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 04:44:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 04:44:54,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:54,195 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 04:44:54,195 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:54,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 04:44:54,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:54,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:54,197 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:54,260 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 04:44:54,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:54,261 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:54,261 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-10 04:44:54,263 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-11-10 04:44:54,294 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:44:54,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:44:54,399 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 04:44:54,400 INFO L272 AbstractInterpreter]: Visited 16 different actions 49 times. Never merged. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-10 04:44:54,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:54,406 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 04:44:54,451 INFO L227 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 58.33% of their original sizes. [2018-11-10 04:44:54,452 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 04:44:54,575 INFO L415 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-11-10 04:44:54,576 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 04:44:54,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 04:44:54,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-11-10 04:44:54,576 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:54,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:44:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:44:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:44:54,578 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2018-11-10 04:44:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:54,860 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-11-10 04:44:54,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 04:44:54,860 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2018-11-10 04:44:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:54,861 INFO L225 Difference]: With dead ends: 39 [2018-11-10 04:44:54,861 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 04:44:54,862 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:44:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 04:44:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-10 04:44:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 04:44:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-10 04:44:54,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2018-11-10 04:44:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:54,868 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-10 04:44:54,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:44:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-10 04:44:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 04:44:54,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:54,868 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 04:44:54,868 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:54,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 04:44:54,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:54,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:54,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:54,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:54,870 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:54,931 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 04:44:54,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:54,931 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:54,932 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 04:44:54,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 04:44:54,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:54,933 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 04:44:54,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 04:44:54,948 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 04:44:54,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 04:44:54,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:44:54,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:44:55,011 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 04:44:55,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:44:55,308 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 04:44:55,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:44:55,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-11-10 04:44:55,324 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:44:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 04:44:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 04:44:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:44:55,325 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2018-11-10 04:44:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:55,363 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-11-10 04:44:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 04:44:55,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 04:44:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:55,365 INFO L225 Difference]: With dead ends: 49 [2018-11-10 04:44:55,365 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 04:44:55,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:44:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 04:44:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-11-10 04:44:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 04:44:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 04:44:55,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2018-11-10 04:44:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:55,370 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 04:44:55,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 04:44:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 04:44:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 04:44:55,370 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:55,371 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 04:44:55,371 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:55,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 04:44:55,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:55,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:55,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:44:55,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:55,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:55,434 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 04:44:55,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:55,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:55,435 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 04:44:55,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 04:44:55,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:55,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 04:44:55,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 04:44:55,449 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 04:44:55,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 04:44:55,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:44:55,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:44:55,466 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 04:44:55,466 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:44:55,742 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 04:44:55,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:44:55,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-11-10 04:44:55,757 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:44:55,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:44:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:44:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:44:55,758 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2018-11-10 04:44:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:55,798 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2018-11-10 04:44:55,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 04:44:55,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 04:44:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:55,800 INFO L225 Difference]: With dead ends: 52 [2018-11-10 04:44:55,800 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 04:44:55,800 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 04:44:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 04:44:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2018-11-10 04:44:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 04:44:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 04:44:55,805 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2018-11-10 04:44:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:55,805 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 04:44:55,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:44:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 04:44:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 04:44:55,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:55,806 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 04:44:55,806 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:55,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 04:44:55,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:55,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:55,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:44:55,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:55,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:55,857 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 04:44:55,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:55,858 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:55,858 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 04:44:55,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 04:44:55,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:55,859 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 04:44:55,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:55,876 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 04:44:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:55,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:44:55,895 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 04:44:55,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:44:56,328 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 04:44:56,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:44:56,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 14 [2018-11-10 04:44:56,344 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:44:56,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 04:44:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 04:44:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:44:56,345 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 9 states. [2018-11-10 04:44:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:56,384 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-11-10 04:44:56,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 04:44:56,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 04:44:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:56,385 INFO L225 Difference]: With dead ends: 55 [2018-11-10 04:44:56,385 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 04:44:56,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-11-10 04:44:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 04:44:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-11-10 04:44:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 04:44:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 04:44:56,389 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 37 [2018-11-10 04:44:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:56,389 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 04:44:56,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 04:44:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 04:44:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 04:44:56,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:56,390 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 04:44:56,390 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:56,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:56,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 04:44:56,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:56,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:56,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:56,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:56,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:56,516 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 04:44:56,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:56,516 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:56,516 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 04:44:56,517 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 04:44:56,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:56,517 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/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 04:44:56,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 04:44:56,523 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 04:44:56,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 04:44:56,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:44:56,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:44:56,570 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 04:44:56,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:44:56,776 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 04:44:56,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:44:56,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2018-11-10 04:44:56,792 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:44:56,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 04:44:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 04:44:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:44:56,793 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2018-11-10 04:44:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:56,875 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2018-11-10 04:44:56,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 04:44:56,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-10 04:44:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:56,877 INFO L225 Difference]: With dead ends: 58 [2018-11-10 04:44:56,877 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 04:44:56,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:44:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 04:44:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2018-11-10 04:44:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 04:44:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 04:44:56,881 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 43 [2018-11-10 04:44:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:56,882 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 04:44:56,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 04:44:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 04:44:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 04:44:56,883 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:56,883 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 04:44:56,883 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:56,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 04:44:56,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:56,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:44:56,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:56,884 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 04:44:56,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:44:56,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 04:44:56,974 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:56,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 04:44:56,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 04:44:56,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:44:56,975 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-11-10 04:44:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:57,036 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-11-10 04:44:57,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:44:57,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 04:44:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:57,037 INFO L225 Difference]: With dead ends: 48 [2018-11-10 04:44:57,037 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 04:44:57,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-10 04:44:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 04:44:57,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 04:44:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 04:44:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 04:44:57,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2018-11-10 04:44:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:57,039 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 04:44:57,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 04:44:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 04:44:57,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 04:44:57,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 04:44:57,071 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 04:44:57,071 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= (* 2 main_~input~0) 10) (<= 5 main_~input~0)) [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-10 04:44:57,071 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-10 04:44:57,072 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-10 04:44:57,072 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-10 04:44:57,072 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-10 04:44:57,072 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-10 04:44:57,072 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-10 04:44:57,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:44:57 BoogieIcfgContainer [2018-11-10 04:44:57,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:44:57,074 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:44:57,074 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:44:57,074 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:44:57,074 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:53" (3/4) ... [2018-11-10 04:44:57,076 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 04:44:57,080 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 04:44:57,080 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 04:44:57,080 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-10 04:44:57,082 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 04:44:57,083 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 04:44:57,083 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 04:44:57,106 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f5b0745e-a4c4-4ec1-9c7c-9cc4d8c87ffb/bin-2019/utaipan/witness.graphml [2018-11-10 04:44:57,106 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:44:57,107 INFO L168 Benchmark]: Toolchain (without parser) took 3526.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 959.1 MB in the beginning and 923.0 MB in the end (delta: 36.1 MB). Peak memory consumption was 240.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:57,108 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:57,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.31 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:57,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.94 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:57,109 INFO L168 Benchmark]: Boogie Preprocessor took 9.56 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:57,109 INFO L168 Benchmark]: RCFGBuilder took 151.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:57,110 INFO L168 Benchmark]: TraceAbstraction took 3184.45 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 923.0 MB in the end (delta: 201.4 MB). Peak memory consumption was 270.6 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:57,110 INFO L168 Benchmark]: Witness Printer took 32.83 ms. Allocated memory is still 1.2 GB. Free memory is still 923.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:57,112 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 134.31 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.94 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.56 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 151.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3184.45 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 923.0 MB in the end (delta: 201.4 MB). Peak memory consumption was 270.6 MB. Max. memory is 11.5 GB. * Witness Printer took 32.83 ms. Allocated memory is still 1.2 GB. Free memory is still 923.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 69 SDslu, 677 SDs, 0 SdLazy, 291 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 378 GetRequests, 260 SyntacticMatches, 29 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.8657407407407407 AbsIntWeakeningRatio, 0.5555555555555556 AbsIntAvgWeakeningVarsNumRemoved, 6.944444444444445 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 21 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 111 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 353 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 474 ConstructedInterpolants, 0 QuantifiedInterpolants, 47664 SizeOfPredicates, 16 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 351/646 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...