./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 43bf08ab7eab650af2134651dc434d79e4859447 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 10:39:13,898 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 10:39:13,899 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 10:39:13,905 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 10:39:13,905 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 10:39:13,905 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 10:39:13,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 10:39:13,907 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 10:39:13,907 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 10:39:13,908 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 10:39:13,908 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 10:39:13,908 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 10:39:13,909 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 10:39:13,909 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 10:39:13,910 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 10:39:13,910 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 10:39:13,910 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 10:39:13,911 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 10:39:13,912 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 10:39:13,913 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 10:39:13,913 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 10:39:13,914 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 10:39:13,915 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 10:39:13,915 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 10:39:13,915 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 10:39:13,916 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 10:39:13,916 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 10:39:13,916 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 10:39:13,917 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 10:39:13,917 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 10:39:13,917 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 10:39:13,918 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 10:39:13,918 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 10:39:13,918 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 10:39:13,918 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 10:39:13,919 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 10:39:13,919 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 10:39:13,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 10:39:13,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 10:39:13,926 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 10:39:13,927 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 10:39:13,927 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 10:39:13,928 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 10:39:13,928 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 10:39:13,928 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 10:39:13,929 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 10:39:13,929 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 10:39:13,929 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_b7f77b67-6201-48e8-8989-15ef89e92442/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 -> 43bf08ab7eab650af2134651dc434d79e4859447 [2018-12-02 10:39:13,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 10:39:13,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 10:39:13,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 10:39:13,956 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 10:39:13,956 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 10:39:13,957 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i [2018-12-02 10:39:13,992 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/data/a72e2f4e0/cd63d6d44e944bd389135cfb67191072/FLAG2fc4cdd1b [2018-12-02 10:39:14,393 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 10:39:14,394 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i [2018-12-02 10:39:14,397 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/data/a72e2f4e0/cd63d6d44e944bd389135cfb67191072/FLAG2fc4cdd1b [2018-12-02 10:39:14,405 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/data/a72e2f4e0/cd63d6d44e944bd389135cfb67191072 [2018-12-02 10:39:14,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 10:39:14,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 10:39:14,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 10:39:14,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 10:39:14,412 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 10:39:14,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3eaa10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14, skipping insertion in model container [2018-12-02 10:39:14,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 10:39:14,432 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 10:39:14,518 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 10:39:14,521 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 10:39:14,528 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 10:39:14,536 INFO L195 MainTranslator]: Completed translation [2018-12-02 10:39:14,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14 WrapperNode [2018-12-02 10:39:14,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 10:39:14,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 10:39:14,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 10:39:14,537 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 10:39:14,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 10:39:14,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 10:39:14,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 10:39:14,549 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 10:39:14,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... [2018-12-02 10:39:14,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 10:39:14,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 10:39:14,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 10:39:14,561 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 10:39:14,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 10:39:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 10:39:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 10:39:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 10:39:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 10:39:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 10:39:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 10:39:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 10:39:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 10:39:14,699 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 10:39:14,699 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 10:39:14,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:39:14 BoogieIcfgContainer [2018-12-02 10:39:14,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 10:39:14,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 10:39:14,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 10:39:14,701 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 10:39:14,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:39:14" (1/3) ... [2018-12-02 10:39:14,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d7b4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:39:14, skipping insertion in model container [2018-12-02 10:39:14,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:39:14" (2/3) ... [2018-12-02 10:39:14,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d7b4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:39:14, skipping insertion in model container [2018-12-02 10:39:14,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:39:14" (3/3) ... [2018-12-02 10:39:14,703 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_1_true-unreach-call_true-termination.i [2018-12-02 10:39:14,708 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 10:39:14,712 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 10:39:14,720 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 10:39:14,737 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 10:39:14,737 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 10:39:14,737 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 10:39:14,737 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 10:39:14,737 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 10:39:14,737 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 10:39:14,737 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 10:39:14,737 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 10:39:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-02 10:39:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 10:39:14,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:14,750 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:14,751 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:14,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-12-02 10:39:14,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:14,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:14,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,783 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:14,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 10:39:14,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 10:39:14,814 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 10:39:14,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 10:39:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 10:39:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 10:39:14,825 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-02 10:39:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:14,836 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-12-02 10:39:14,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 10:39:14,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 10:39:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:14,842 INFO L225 Difference]: With dead ends: 31 [2018-12-02 10:39:14,842 INFO L226 Difference]: Without dead ends: 12 [2018-12-02 10:39:14,844 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 10:39:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-02 10:39:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-02 10:39:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-02 10:39:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-02 10:39:14,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-02 10:39:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:14,863 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-02 10:39:14,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 10:39:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-02 10:39:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 10:39:14,864 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:14,864 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:14,864 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:14,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1877050693, now seen corresponding path program 1 times [2018-12-02 10:39:14,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:14,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:14,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,865 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:14,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 10:39:14,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 10:39:14,883 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 10:39:14,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 10:39:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 10:39:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 10:39:14,885 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-12-02 10:39:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:14,904 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-02 10:39:14,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 10:39:14,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 10:39:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:14,905 INFO L225 Difference]: With dead ends: 19 [2018-12-02 10:39:14,905 INFO L226 Difference]: Without dead ends: 14 [2018-12-02 10:39:14,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 10:39:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-02 10:39:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-12-02 10:39:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-02 10:39:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-02 10:39:14,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-12-02 10:39:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:14,908 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-02 10:39:14,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 10:39:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-02 10:39:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-02 10:39:14,908 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:14,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:14,909 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:14,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1175909113, now seen corresponding path program 1 times [2018-12-02 10:39:14,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:14,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:14,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:14,910 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:14,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:14,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 10:39:14,924 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2018-12-02 10:39:14,926 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [14], [21], [24], [26], [32], [33], [34], [36] [2018-12-02 10:39:14,944 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 10:39:14,944 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 10:39:15,029 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 10:39:15,029 INFO L272 AbstractInterpreter]: Visited 12 different actions 28 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 60 root evaluator evaluations with a maximum evaluation depth of 4. Performed 60 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 2 variables. [2018-12-02 10:39:15,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:15,035 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 10:39:15,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 [2018-12-02 10:39:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:15,043 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 10:39:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 10:39:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 10:39:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 10:39:15,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-12-02 10:39:15,095 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 10:39:15,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 10:39:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 10:39:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 10:39:15,096 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2018-12-02 10:39:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:15,108 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-02 10:39:15,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 10:39:15,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-02 10:39:15,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:15,109 INFO L225 Difference]: With dead ends: 21 [2018-12-02 10:39:15,109 INFO L226 Difference]: Without dead ends: 16 [2018-12-02 10:39:15,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 10:39:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-02 10:39:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-12-02 10:39:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-02 10:39:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-02 10:39:15,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-12-02 10:39:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:15,111 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-02 10:39:15,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 10:39:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-02 10:39:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 10:39:15,111 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:15,112 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:15,112 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:15,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1607619511, now seen corresponding path program 2 times [2018-12-02 10:39:15,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:15,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:15,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,113 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 10:39:15,138 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 10:39:15,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 10:39:15,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 [2018-12-02 10:39:15,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 10:39:15,144 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 10:39:15,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 10:39:15,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 10:39:15,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 10:39:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 10:39:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 10:39:15,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-12-02 10:39:15,207 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 10:39:15,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 10:39:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 10:39:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 10:39:15,207 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-12-02 10:39:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:15,218 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-02 10:39:15,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 10:39:15,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-02 10:39:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:15,219 INFO L225 Difference]: With dead ends: 23 [2018-12-02 10:39:15,219 INFO L226 Difference]: Without dead ends: 18 [2018-12-02 10:39:15,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 10:39:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-02 10:39:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-12-02 10:39:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 10:39:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-02 10:39:15,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-12-02 10:39:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:15,222 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-02 10:39:15,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 10:39:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-02 10:39:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 10:39:15,223 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:15,223 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:15,223 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:15,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:15,223 INFO L82 PathProgramCache]: Analyzing trace with hash -130515723, now seen corresponding path program 3 times [2018-12-02 10:39:15,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:15,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 10:39:15,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,224 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,246 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 10:39:15,247 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 10:39:15,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 10:39:15,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,247 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 [2018-12-02 10:39:15,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 10:39:15,254 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 10:39:15,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 10:39:15,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 10:39:15,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 10:39:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 10:39:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 10:39:15,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2018-12-02 10:39:15,318 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 10:39:15,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 10:39:15,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 10:39:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 10:39:15,319 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-12-02 10:39:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:15,333 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-12-02 10:39:15,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 10:39:15,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-12-02 10:39:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:15,333 INFO L225 Difference]: With dead ends: 25 [2018-12-02 10:39:15,334 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 10:39:15,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-02 10:39:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 10:39:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-12-02 10:39:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-02 10:39:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-12-02 10:39:15,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-12-02 10:39:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:15,336 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-12-02 10:39:15,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 10:39:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-12-02 10:39:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 10:39:15,336 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:15,336 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:15,336 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:15,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash 263802547, now seen corresponding path program 4 times [2018-12-02 10:39:15,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:15,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 10:39:15,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,337 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,363 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 10:39:15,364 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 10:39:15,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 10:39:15,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 [2018-12-02 10:39:15,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:15,370 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 10:39:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 10:39:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 10:39:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 10:39:15,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-12-02 10:39:15,441 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 10:39:15,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 10:39:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 10:39:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 10:39:15,441 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2018-12-02 10:39:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:15,452 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-12-02 10:39:15,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 10:39:15,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-12-02 10:39:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:15,453 INFO L225 Difference]: With dead ends: 27 [2018-12-02 10:39:15,453 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 10:39:15,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 10:39:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 10:39:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-02 10:39:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-02 10:39:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-02 10:39:15,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-12-02 10:39:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:15,455 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-02 10:39:15,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 10:39:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-02 10:39:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-02 10:39:15,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 10:39:15,455 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 10:39:15,456 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 10:39:15,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 10:39:15,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1246537969, now seen corresponding path program 5 times [2018-12-02 10:39:15,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 10:39:15,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 10:39:15,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 10:39:15,457 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 10:39:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 10:39:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 10:39:15,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,492 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 10:39:15,492 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 10:39:15,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 10:39:15,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 10:39:15,492 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/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 [2018-12-02 10:39:15,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 10:39:15,498 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 10:39:15,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 10:39:15,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 10:39:15,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 10:39:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-02 10:39:15,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 10:39:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-02 10:39:15,587 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-02 10:39:15,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 15 [2018-12-02 10:39:15,588 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 10:39:15,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 10:39:15,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 10:39:15,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-12-02 10:39:15,588 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2018-12-02 10:39:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 10:39:15,604 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-02 10:39:15,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 10:39:15,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-12-02 10:39:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 10:39:15,604 INFO L225 Difference]: With dead ends: 21 [2018-12-02 10:39:15,604 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 10:39:15,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-12-02 10:39:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 10:39:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 10:39:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 10:39:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 10:39:15,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-12-02 10:39:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 10:39:15,606 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 10:39:15,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 10:39:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 10:39:15,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 10:39:15,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 10:39:15,628 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 10:39:15,629 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 15) the Hoare annotation is: true [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 15) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 15) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L448 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-12-02 10:39:15,629 INFO L444 ceAbstractionStarter]: At program point L12-3(line 12) the Hoare annotation is: (<= main_~i~0 1000000) [2018-12-02 10:39:15,629 INFO L444 ceAbstractionStarter]: At program point L12-4(line 12) the Hoare annotation is: (and (<= main_~i~0 1000000) (<= 1000000 main_~i~0)) [2018-12-02 10:39:15,630 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-02 10:39:15,630 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-02 10:39:15,630 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-02 10:39:15,630 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-02 10:39:15,630 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-02 10:39:15,630 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-02 10:39:15,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:39:15 BoogieIcfgContainer [2018-12-02 10:39:15,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 10:39:15,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 10:39:15,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 10:39:15,637 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 10:39:15,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:39:14" (3/4) ... [2018-12-02 10:39:15,639 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 10:39:15,643 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 10:39:15,643 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 10:39:15,644 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-02 10:39:15,646 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-12-02 10:39:15,646 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-02 10:39:15,646 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 10:39:15,668 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b7f77b67-6201-48e8-8989-15ef89e92442/bin-2019/utaipan/witness.graphml [2018-12-02 10:39:15,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 10:39:15,669 INFO L168 Benchmark]: Toolchain (without parser) took 1261.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 953.6 MB in the beginning and 930.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 132.8 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,670 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 10:39:15,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.37 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 945.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.39 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 942.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,671 INFO L168 Benchmark]: Boogie Preprocessor took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 10:39:15,671 INFO L168 Benchmark]: RCFGBuilder took 138.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -149.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,671 INFO L168 Benchmark]: TraceAbstraction took 937.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 934.5 MB in the end (delta: 158.2 MB). Peak memory consumption was 158.2 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,672 INFO L168 Benchmark]: Witness Printer took 31.74 ms. Allocated memory is still 1.1 GB. Free memory was 934.5 MB in the beginning and 930.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2018-12-02 10:39:15,674 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.37 ms. Allocated memory is still 1.0 GB. Free memory was 953.6 MB in the beginning and 945.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.39 ms. Allocated memory is still 1.0 GB. Free memory was 945.6 MB in the beginning and 942.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 138.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.1 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -149.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 937.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 934.5 MB in the end (delta: 158.2 MB). Peak memory consumption was 158.2 MB. Max. memory is 11.5 GB. * Witness Printer took 31.74 ms. Allocated memory is still 1.1 GB. Free memory was 934.5 MB in the beginning and 930.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 75 SDtfs, 19 SDslu, 128 SDs, 0 SdLazy, 70 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 15 HoareAnnotationTreeSize, 13 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 180 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 243 ConstructedInterpolants, 0 QuantifiedInterpolants, 6799 SizeOfPredicates, 6 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...