./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_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:21,049 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:20:21,051 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:20:21,061 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:20:21,061 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:20:21,062 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:20:21,064 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:20:21,065 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:20:21,067 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:20:21,068 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:20:21,069 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:20:21,069 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:20:21,070 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:20:21,071 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:20:21,072 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:20:21,073 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:20:21,074 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:20:21,076 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:20:21,078 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:20:21,080 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:20:21,081 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:20:21,082 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:20:21,085 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:20:21,085 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:20:21,085 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:20:21,086 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:20:21,087 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:20:21,088 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:20:21,089 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:20:21,090 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:20:21,091 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:20:21,092 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:20:21,092 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:20:21,092 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:20:21,093 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:20:21,094 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:20:21,094 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 22:20:21,109 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:20:21,109 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:20:21,110 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:20:21,111 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 22:20:21,111 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 22:20:21,111 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 22:20:21,111 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 22:20:21,112 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 22:20:21,112 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 22:20:21,112 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 22:20:21,112 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 22:20:21,113 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:20:21,113 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 22:20:21,113 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:20:21,114 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 22:20:21,114 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:20:21,114 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:20:21,114 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:20:21,116 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:20:21,116 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 22:20:21,116 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:20:21,117 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:20:21,117 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:20:21,117 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:20:21,117 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:20:21,117 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:20:21,118 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:20:21,118 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:20:21,118 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:20:21,118 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:20:21,118 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 22:20:21,119 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:20:21,119 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:20:21,119 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:20:21,119 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_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:21,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:20:21,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:20:21,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:20:21,175 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:20:21,176 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:20:21,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-10-26 22:20:21,239 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/data/6c4628155/29f142f16217423ab8997abfee15ccef/FLAGc3acb5dfd [2018-10-26 22:20:21,611 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:20:21,611 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-10-26 22:20:21,617 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/data/6c4628155/29f142f16217423ab8997abfee15ccef/FLAGc3acb5dfd [2018-10-26 22:20:21,629 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/data/6c4628155/29f142f16217423ab8997abfee15ccef [2018-10-26 22:20:21,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:20:21,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 22:20:21,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:20:21,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:20:21,639 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:20:21,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de743ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21, skipping insertion in model container [2018-10-26 22:20:21,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:20:21,681 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:20:21,825 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:20:21,828 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:20:21,844 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:20:21,859 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:20:21,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21 WrapperNode [2018-10-26 22:20:21,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:20:21,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:20:21,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:20:21,861 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:20:21,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:20:21,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:20:21,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:20:21,879 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:20:21,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... [2018-10-26 22:20:21,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:20:21,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:20:21,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:20:21,897 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:20:21,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 22:20:22,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 22:20:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:20:22,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:20:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 22:20:22,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 22:20:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 22:20:22,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 22:20:22,445 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:20:22,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:20:22 BoogieIcfgContainer [2018-10-26 22:20:22,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:20:22,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:20:22,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:20:22,451 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:20:22,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:20:21" (1/3) ... [2018-10-26 22:20:22,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329dc698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:20:22, skipping insertion in model container [2018-10-26 22:20:22,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:20:21" (2/3) ... [2018-10-26 22:20:22,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329dc698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:20:22, skipping insertion in model container [2018-10-26 22:20:22,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:20:22" (3/3) ... [2018-10-26 22:20:22,457 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-10-26 22:20:22,468 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:20:22,478 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:20:22,501 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:20:22,549 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:20:22,549 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:20:22,549 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:20:22,549 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:20:22,550 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:20:22,550 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:20:22,550 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:20:22,550 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:20:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-26 22:20:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 22:20:22,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:22,585 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:22,589 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:22,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash 439143249, now seen corresponding path program 1 times [2018-10-26 22:20:22,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:22,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:22,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:22,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:22,656 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:22,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:20:22,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:20:22,741 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:20:22,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:20:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:20:22,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:20:22,764 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-26 22:20:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:22,795 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-10-26 22:20:22,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:20:22,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-26 22:20:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:22,806 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:20:22,807 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 22:20:22,812 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 [2018-10-26 22:20:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 22:20:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-26 22:20:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 22:20:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-26 22:20:22,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-10-26 22:20:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:22,858 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-26 22:20:22,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:20:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-26 22:20:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:20:22,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:22,861 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:22,862 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:22,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 299545522, now seen corresponding path program 1 times [2018-10-26 22:20:22,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:22,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:22,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:22,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:22,867 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:23,188 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-10-26 22:20:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:23,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:20:23,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-26 22:20:23,433 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:20:23,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:20:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:20:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:20:23,439 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-26 22:20:23,607 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-26 22:20:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:23,790 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-10-26 22:20:23,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:20:23,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-26 22:20:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:23,793 INFO L225 Difference]: With dead ends: 29 [2018-10-26 22:20:23,793 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 22:20:23,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:20:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 22:20:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2018-10-26 22:20:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 22:20:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-26 22:20:23,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-10-26 22:20:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:23,801 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-26 22:20:23,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:20:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-26 22:20:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 22:20:23,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:23,802 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:23,804 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:23,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2077692347, now seen corresponding path program 1 times [2018-10-26 22:20:23,804 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:23,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:23,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:23,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:23,806 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:24,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:24,162 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:20:24,163 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-26 22:20:24,165 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-26 22:20:24,211 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:20:24,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:20:24,337 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 22:20:24,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 22:20:24,391 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. [2018-10-26 22:20:24,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:24,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 22:20:24,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:24,426 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 22:20:24,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:24,441 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:20:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:24,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:20:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:24,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:20:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:25,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:20:25,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-10-26 22:20:25,083 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:20:25,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:20:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:20:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:20:25,083 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2018-10-26 22:20:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:25,235 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-26 22:20:25,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:20:25,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-10-26 22:20:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:25,236 INFO L225 Difference]: With dead ends: 33 [2018-10-26 22:20:25,236 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 22:20:25,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:20:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 22:20:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-10-26 22:20:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 22:20:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-26 22:20:25,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-10-26 22:20:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:25,241 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-26 22:20:25,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:20:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-26 22:20:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:20:25,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:25,241 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:25,242 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:25,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1259125948, now seen corresponding path program 2 times [2018-10-26 22:20:25,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:25,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:25,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:25,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:25,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:25,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:25,336 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:20:25,336 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 22:20:25,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 22:20:25,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:25,336 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:25,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:20:25,344 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 22:20:25,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 22:20:25,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:20:25,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:20:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:20:25,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:20:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-26 22:20:25,519 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-26 22:20:25,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [4] total 9 [2018-10-26 22:20:25,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:20:25,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:20:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:20:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:20:25,521 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-26 22:20:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:25,548 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-26 22:20:25,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:20:25,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-26 22:20:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:25,550 INFO L225 Difference]: With dead ends: 34 [2018-10-26 22:20:25,550 INFO L226 Difference]: Without dead ends: 25 [2018-10-26 22:20:25,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:20:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-26 22:20:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-26 22:20:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-26 22:20:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-26 22:20:25,555 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-26 22:20:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:25,555 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-26 22:20:25,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:20:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-26 22:20:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 22:20:25,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:25,556 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:25,556 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:25,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2068472574, now seen corresponding path program 1 times [2018-10-26 22:20:25,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:25,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:25,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:20:25,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:25,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:25,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:25,856 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:20:25,856 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-26 22:20:25,856 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [20], [22], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-26 22:20:25,857 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 22:20:25,857 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 22:20:25,870 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 22:20:26,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 22:20:26,407 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. [2018-10-26 22:20:26,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:26,431 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 22:20:26,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:26,431 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:26,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:26,437 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 22:20:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:26,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:20:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:26,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:20:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:27,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:20:27,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2018-10-26 22:20:27,440 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:20:27,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:20:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:20:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:20:27,441 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 17 states. [2018-10-26 22:20:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:27,798 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-10-26 22:20:27,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:20:27,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-10-26 22:20:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:27,804 INFO L225 Difference]: With dead ends: 55 [2018-10-26 22:20:27,804 INFO L226 Difference]: Without dead ends: 38 [2018-10-26 22:20:27,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:20:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-26 22:20:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-26 22:20:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:20:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-26 22:20:27,811 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2018-10-26 22:20:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:27,811 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-26 22:20:27,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:20:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-26 22:20:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-26 22:20:27,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:20:27,812 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:20:27,812 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:20:27,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:20:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1794670498, now seen corresponding path program 2 times [2018-10-26 22:20:27,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:20:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:27,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:20:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:20:27,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:20:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:20:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-26 22:20:28,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:28,173 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 22:20:28,173 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 22:20:28,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 22:20:28,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:20:28,173 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/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 [2018-10-26 22:20:28,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:20:28,182 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 22:20:28,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-26 22:20:28,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:20:28,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:20:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:28,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 22:20:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:20:33,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 22:20:33,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2018-10-26 22:20:33,693 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 22:20:33,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:20:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:20:33,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1247, Unknown=15, NotChecked=0, Total=1482 [2018-10-26 22:20:33,694 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 25 states. [2018-10-26 22:20:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:20:34,317 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2018-10-26 22:20:34,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:20:34,318 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2018-10-26 22:20:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:20:34,319 INFO L225 Difference]: With dead ends: 62 [2018-10-26 22:20:34,319 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:20:34,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=516, Invalid=2775, Unknown=15, NotChecked=0, Total=3306 [2018-10-26 22:20:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:20:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:20:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:20:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:20:34,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-10-26 22:20:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:20:34,321 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:20:34,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:20:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:20:34,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:20:34,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:20:34,462 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:20:34,463 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 22:20:34,463 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:20:34,463 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-10-26 22:20:34,463 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-10-26 22:20:34,464 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-26 22:20:34,464 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-10-26 22:20:34,464 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-10-26 22:20:34,464 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 19) no Hoare annotation was computed. [2018-10-26 22:20:34,464 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)))) [2018-10-26 22:20:34,464 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)) [2018-10-26 22:20:34,464 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-26 22:20:34,464 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-26 22:20:34,465 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-26 22:20:34,465 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-26 22:20:34,465 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-26 22:20:34,465 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-26 22:20:34,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:20:34 BoogieIcfgContainer [2018-10-26 22:20:34,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:20:34,481 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:20:34,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:20:34,482 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:20:34,484 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:20:22" (3/4) ... [2018-10-26 22:20:34,489 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 22:20:34,506 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 22:20:34,508 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 22:20:34,509 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-26 22:20:34,513 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-26 22:20:34,514 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-26 22:20:34,514 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 22:20:34,564 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6929771f-a4d5-4c33-bf37-7722cf8091e9/bin-2019/utaipan/witness.graphml [2018-10-26 22:20:34,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:20:34,565 INFO L168 Benchmark]: Toolchain (without parser) took 12932.28 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 236.5 MB). Free memory was 960.3 MB in the beginning and 877.5 MB in the end (delta: 82.8 MB). Peak memory consumption was 319.3 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,568 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-10-26 22:20:34,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.69 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,571 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.85 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:20:34,578 INFO L168 Benchmark]: Boogie Preprocessor took 18.01 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,579 INFO L168 Benchmark]: RCFGBuilder took 549.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 946.8 MB in the beginning and 1.2 GB in the end (delta: -217.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,580 INFO L168 Benchmark]: TraceAbstraction took 12034.21 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 55.6 MB). Free memory was 1.2 GB in the beginning and 882.6 MB in the end (delta: 281.6 MB). Peak memory consumption was 337.2 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,580 INFO L168 Benchmark]: Witness Printer took 82.65 ms. Allocated memory is still 1.3 GB. Free memory was 882.6 MB in the beginning and 877.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-10-26 22:20:34,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 225.69 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 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 17.85 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.01 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 549.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 946.8 MB in the beginning and 1.2 GB in the end (delta: -217.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12034.21 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 55.6 MB). Free memory was 1.2 GB in the beginning and 882.6 MB in the end (delta: 281.6 MB). Peak memory consumption was 337.2 MB. Max. memory is 11.5 GB. * Witness Printer took 82.65 ms. Allocated memory is still 1.3 GB. Free memory was 882.6 MB in the beginning and 877.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 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: 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, 11.9s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 440 SDs, 0 SdLazy, 620 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 9.0s 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, 0.8s 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, 0.1s SatisfiabilityAnalysisTime, 8.7s 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...