./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i --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_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 14367fbcb63815bbc35abe1c5a8e938762f99ead ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:43:03,402 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 07:43:03,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 07:43:03,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 07:43:03,409 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 07:43:03,409 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 07:43:03,410 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 07:43:03,411 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 07:43:03,411 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 07:43:03,412 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 07:43:03,413 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 07:43:03,413 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 07:43:03,413 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 07:43:03,414 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 07:43:03,415 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 07:43:03,415 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 07:43:03,416 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 07:43:03,417 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 07:43:03,418 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 07:43:03,419 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 07:43:03,419 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 07:43:03,420 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 07:43:03,422 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 07:43:03,422 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 07:43:03,422 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 07:43:03,423 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 07:43:03,423 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 07:43:03,424 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 07:43:03,425 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 07:43:03,429 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 07:43:03,429 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 07:43:03,430 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 07:43:03,430 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 07:43:03,430 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 07:43:03,430 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 07:43:03,431 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 07:43:03,431 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 07:43:03,441 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 07:43:03,441 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 07:43:03,442 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 07:43:03,442 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 07:43:03,442 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 07:43:03,442 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 07:43:03,442 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 07:43:03,442 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 07:43:03,443 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 07:43:03,443 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 07:43:03,443 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 07:43:03,443 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 07:43:03,443 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 07:43:03,443 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 07:43:03,444 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 07:43:03,445 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 07:43:03,445 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 07:43:03,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 07:43:03,446 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 07:43:03,446 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_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 -> 14367fbcb63815bbc35abe1c5a8e938762f99ead [2018-11-10 07:43:03,468 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 07:43:03,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 07:43:03,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 07:43:03,481 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 07:43:03,481 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 07:43:03,482 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-11-10 07:43:03,525 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/data/aba0791df/8969b14e05be4f9fa0333aa59e97ef39/FLAG33c9c42d4 [2018-11-10 07:43:03,918 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 07:43:03,919 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-11-10 07:43:03,923 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/data/aba0791df/8969b14e05be4f9fa0333aa59e97ef39/FLAG33c9c42d4 [2018-11-10 07:43:03,934 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/data/aba0791df/8969b14e05be4f9fa0333aa59e97ef39 [2018-11-10 07:43:03,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 07:43:03,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 07:43:03,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 07:43:03,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 07:43:03,942 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 07:43:03,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:43:03" (1/1) ... [2018-11-10 07:43:03,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4541c043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:03, skipping insertion in model container [2018-11-10 07:43:03,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 07:43:03" (1/1) ... [2018-11-10 07:43:03,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 07:43:03,963 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 07:43:04,058 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:43:04,061 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 07:43:04,070 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 07:43:04,078 INFO L193 MainTranslator]: Completed translation [2018-11-10 07:43:04,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04 WrapperNode [2018-11-10 07:43:04,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 07:43:04,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 07:43:04,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 07:43:04,079 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 07:43:04,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 07:43:04,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 07:43:04,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 07:43:04,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 07:43:04,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... [2018-11-10 07:43:04,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 07:43:04,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 07:43:04,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 07:43:04,100 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 07:43:04,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 07:43:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 07:43:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 07:43:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 07:43:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 07:43:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 07:43:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 07:43:04,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 07:43:04,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 07:43:04,285 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 07:43:04,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:43:04 BoogieIcfgContainer [2018-11-10 07:43:04,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 07:43:04,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 07:43:04,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 07:43:04,289 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 07:43:04,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 07:43:03" (1/3) ... [2018-11-10 07:43:04,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274a9acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:43:04, skipping insertion in model container [2018-11-10 07:43:04,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 07:43:04" (2/3) ... [2018-11-10 07:43:04,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274a9acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 07:43:04, skipping insertion in model container [2018-11-10 07:43:04,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:43:04" (3/3) ... [2018-11-10 07:43:04,291 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-11-10 07:43:04,297 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 07:43:04,301 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 07:43:04,311 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 07:43:04,333 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 07:43:04,333 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 07:43:04,333 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 07:43:04,333 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 07:43:04,333 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 07:43:04,334 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 07:43:04,334 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 07:43:04,334 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 07:43:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-10 07:43:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 07:43:04,353 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:04,353 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:04,355 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:04,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash 439143249, now seen corresponding path program 1 times [2018-11-10 07:43:04,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:04,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:04,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,398 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:04,440 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 07:43:04,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:43:04,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 07:43:04,442 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 07:43:04,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 07:43:04,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 07:43:04,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 07:43:04,454 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-11-10 07:43:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:04,469 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-11-10 07:43:04,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 07:43:04,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-10 07:43:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:04,477 INFO L225 Difference]: With dead ends: 34 [2018-11-10 07:43:04,477 INFO L226 Difference]: Without dead ends: 15 [2018-11-10 07:43:04,480 INFO L605 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 [2018-11-10 07:43:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-10 07:43:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-10 07:43:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-10 07:43:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-10 07:43:04,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-11-10 07:43:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:04,504 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-10 07:43:04,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 07:43:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-10 07:43:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-10 07:43:04,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:04,505 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:04,505 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:04,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:04,505 INFO L82 PathProgramCache]: Analyzing trace with hash 299545522, now seen corresponding path program 1 times [2018-11-10 07:43:04,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:04,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:04,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:04,675 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 07:43:04,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 07:43:04,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 07:43:04,676 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 07:43:04,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 07:43:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 07:43:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 07:43:04,678 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-11-10 07:43:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:04,755 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-11-10 07:43:04,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:43:04,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-11-10 07:43:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:04,757 INFO L225 Difference]: With dead ends: 29 [2018-11-10 07:43:04,758 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 07:43:04,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-10 07:43:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 07:43:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-11-10 07:43:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-10 07:43:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-10 07:43:04,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-11-10 07:43:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:04,763 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-10 07:43:04,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 07:43:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-10 07:43:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-10 07:43:04,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:04,764 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:04,764 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:04,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:04,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2077692347, now seen corresponding path program 1 times [2018-11-10 07:43:04,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:04,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:04,765 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:04,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:04,893 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 07:43:04,893 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-10 07:43:04,895 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [24], [31], [34], [36], [42], [43], [44], [46] [2018-11-10 07:43:04,927 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 07:43:04,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 07:43:05,013 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 07:43:05,040 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 07:43:05,041 INFO L272 AbstractInterpreter]: Visited 15 different actions 23 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-11-10 07:43:05,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:05,046 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 07:43:05,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:05,046 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 07:43:05,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:05,059 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 07:43:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:05,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:43:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:05,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:43:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:05,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 07:43:05,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-11-10 07:43:05,260 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 07:43:05,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 07:43:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 07:43:05,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-10 07:43:05,262 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2018-11-10 07:43:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:05,382 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-10 07:43:05,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 07:43:05,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-11-10 07:43:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:05,383 INFO L225 Difference]: With dead ends: 33 [2018-11-10 07:43:05,383 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 07:43:05,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-11-10 07:43:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 07:43:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-11-10 07:43:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 07:43:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 07:43:05,387 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-11-10 07:43:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:05,387 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 07:43:05,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 07:43:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 07:43:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 07:43:05,388 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:05,388 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:05,388 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:05,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1259125948, now seen corresponding path program 2 times [2018-11-10 07:43:05,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:05,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:05,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:05,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:05,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:05,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:05,428 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 07:43:05,428 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 07:43:05,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 07:43:05,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:05,429 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 07:43:05,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:43:05,437 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 07:43:05,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-10 07:43:05,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:43:05,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:43:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:43:05,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:43:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 07:43:05,530 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-10 07:43:05,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [4] total 9 [2018-11-10 07:43:05,530 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 07:43:05,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 07:43:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 07:43:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-10 07:43:05,531 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-11-10 07:43:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:05,550 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-11-10 07:43:05,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 07:43:05,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-10 07:43:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:05,551 INFO L225 Difference]: With dead ends: 34 [2018-11-10 07:43:05,551 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 07:43:05,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-10 07:43:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 07:43:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-11-10 07:43:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 07:43:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-10 07:43:05,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-11-10 07:43:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:05,554 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-10 07:43:05,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 07:43:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-10 07:43:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-10 07:43:05,555 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:05,555 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:05,555 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:05,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2068472574, now seen corresponding path program 1 times [2018-11-10 07:43:05,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:05,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 07:43:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:05,556 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:05,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:05,710 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 07:43:05,710 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-11-10 07:43:05,710 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [22], [24], [31], [34], [36], [42], [43], [44], [46] [2018-11-10 07:43:05,711 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 07:43:05,712 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 07:43:05,722 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-10 07:43:06,066 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 07:43:06,066 INFO L272 AbstractInterpreter]: Visited 16 different actions 254 times. Merged at 6 different actions 128 times. Widened at 1 different actions 18 times. Found 23 fixpoints after 2 different actions. Largest state had 6 variables. [2018-11-10 07:43:06,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:06,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 07:43:06,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:06,071 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 07:43:06,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:06,077 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 07:43:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:06,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:43:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:06,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:43:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:06,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 07:43:06,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2018-11-10 07:43:06,645 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 07:43:06,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 07:43:06,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 07:43:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-11-10 07:43:06,646 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2018-11-10 07:43:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:06,808 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-11-10 07:43:06,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 07:43:06,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-11-10 07:43:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:06,808 INFO L225 Difference]: With dead ends: 55 [2018-11-10 07:43:06,808 INFO L226 Difference]: Without dead ends: 38 [2018-11-10 07:43:06,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-11-10 07:43:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-10 07:43:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-10 07:43:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-10 07:43:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-11-10 07:43:06,813 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2018-11-10 07:43:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:06,813 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-11-10 07:43:06,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 07:43:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-11-10 07:43:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 07:43:06,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 07:43:06,814 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 07:43:06,814 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 07:43:06,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 07:43:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670498, now seen corresponding path program 2 times [2018-11-10 07:43:06,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 07:43:06,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:06,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 07:43:06,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 07:43:06,815 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 07:43:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 07:43:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 07:43:06,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:06,970 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 07:43:06,970 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 07:43:06,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 07:43:06,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 07:43:06,970 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/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 07:43:06,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 07:43:06,975 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 07:43:06,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 07:43:06,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 07:43:06,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 07:43:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:07,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 07:43:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 07:43:11,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 07:43:11,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2018-11-10 07:43:11,267 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 07:43:11,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 07:43:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 07:43:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1247, Unknown=15, NotChecked=0, Total=1482 [2018-11-10 07:43:11,268 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 25 states. [2018-11-10 07:43:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 07:43:11,652 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-11-10 07:43:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 07:43:11,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2018-11-10 07:43:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 07:43:11,652 INFO L225 Difference]: With dead ends: 62 [2018-11-10 07:43:11,652 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 07:43:11,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=516, Invalid=2775, Unknown=15, NotChecked=0, Total=3306 [2018-11-10 07:43:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 07:43:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 07:43:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 07:43:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 07:43:11,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-11-10 07:43:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 07:43:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 07:43:11,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 07:43:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 07:43:11,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 07:43:11,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 07:43:11,737 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 07:43:11,737 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 07:43:11,737 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 07:43:11,737 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 07:43:11,737 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 07:43:11,737 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 07:43:11,737 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-11-10 07:43:11,737 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 19) no Hoare annotation was computed. [2018-11-10 07:43:11,738 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and (<= main_~i~0 .cse0) (<= .cse0 main_~i~0) .cse1) (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~i~0 0)) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse2 .cse0) (<= .cse0 .cse2) .cse1)))) [2018-11-10 07:43:11,738 INFO L421 ceAbstractionStarter]: At program point L15-5(lines 15 19) the Hoare annotation is: (and (or (<= main_~n~0 0) (<= main_~n~0 main_~k~0)) (<= main_~k~0 main_~n~0)) [2018-11-10 07:43:11,738 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-10 07:43:11,738 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-10 07:43:11,739 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-10 07:43:11,739 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-10 07:43:11,739 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-10 07:43:11,739 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-10 07:43:11,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 07:43:11 BoogieIcfgContainer [2018-11-10 07:43:11,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 07:43:11,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 07:43:11,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 07:43:11,747 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 07:43:11,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 07:43:04" (3/4) ... [2018-11-10 07:43:11,751 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 07:43:11,755 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 07:43:11,755 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 07:43:11,755 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-10 07:43:11,758 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-10 07:43:11,758 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-10 07:43:11,758 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 07:43:11,784 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_92b0b94e-5bbb-420a-bcdf-94a72810ac53/bin-2019/utaipan/witness.graphml [2018-11-10 07:43:11,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 07:43:11,785 INFO L168 Benchmark]: Toolchain (without parser) took 7848.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -68.0 MB). Peak memory consumption was 103.4 MB. Max. memory is 11.5 GB. [2018-11-10 07:43:11,786 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:43:11,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 07:43:11,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.51 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 07:43:11,787 INFO L168 Benchmark]: Boogie Preprocessor took 10.72 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 07:43:11,787 INFO L168 Benchmark]: RCFGBuilder took 185.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -181.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-11-10 07:43:11,787 INFO L168 Benchmark]: TraceAbstraction took 7460.43 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.0 MB). Peak memory consumption was 134.6 MB. Max. memory is 11.5 GB. [2018-11-10 07:43:11,788 INFO L168 Benchmark]: Witness Printer took 37.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 07:43:11,789 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.51 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 10.72 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 185.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -181.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7460.43 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.0 MB). Peak memory consumption was 134.6 MB. Max. memory is 11.5 GB. * Witness Printer took 37.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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: 15]: Loop Invariant Derived loop invariant: (((i <= 2 * n && 2 * n <= i) && n <= k) || ((0 <= n && n <= 0) && i == 0)) || ((i + 1 <= 2 * n && 2 * n <= i + 1) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 7.4s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 440 SDs, 0 SdLazy, 620 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 59 HoareAnnotationTreeSize, 16 FomulaSimplifications, 204 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 213 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 207 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 285 ConstructedInterpolants, 30 QuantifiedInterpolants, 62577 SizeOfPredicates, 16 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 33/270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...