./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/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 041ac1710be6e1a9f4a6c44510c9851574d3d115 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 11:31:59,965 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 11:31:59,966 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 11:31:59,971 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 11:31:59,971 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 11:31:59,972 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 11:31:59,973 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 11:31:59,973 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 11:31:59,974 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 11:31:59,974 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 11:31:59,975 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 11:31:59,975 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 11:31:59,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 11:31:59,976 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 11:31:59,976 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 11:31:59,977 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 11:31:59,977 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 11:31:59,978 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 11:31:59,979 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 11:31:59,979 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 11:31:59,980 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 11:31:59,980 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 11:31:59,982 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 11:31:59,982 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 11:31:59,982 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 11:31:59,982 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 11:31:59,983 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 11:31:59,983 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 11:31:59,984 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 11:31:59,984 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 11:31:59,984 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 11:31:59,984 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 11:31:59,985 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 11:31:59,985 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 11:31:59,985 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 11:31:59,985 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 11:31:59,986 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 11:31:59,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 11:31:59,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 11:31:59,993 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 11:31:59,993 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 11:31:59,993 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 11:31:59,993 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 11:31:59,994 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 11:31:59,994 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 11:31:59,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 11:31:59,995 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 11:31:59,996 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 11:31:59,996 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 11:31:59,996 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_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/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 -> 041ac1710be6e1a9f4a6c44510c9851574d3d115 [2018-12-09 11:32:00,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 11:32:00,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 11:32:00,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 11:32:00,027 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 11:32:00,027 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 11:32:00,028 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/nested9_true-unreach-call_true-termination.i [2018-12-09 11:32:00,074 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/data/90051560f/20c340e4af51424082adbec9aedea45f/FLAG4795c965d [2018-12-09 11:32:00,368 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 11:32:00,368 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/sv-benchmarks/c/loop-invgen/nested9_true-unreach-call_true-termination.i [2018-12-09 11:32:00,372 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/data/90051560f/20c340e4af51424082adbec9aedea45f/FLAG4795c965d [2018-12-09 11:32:00,380 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/data/90051560f/20c340e4af51424082adbec9aedea45f [2018-12-09 11:32:00,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 11:32:00,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 11:32:00,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 11:32:00,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 11:32:00,386 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 11:32:00,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428c1b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00, skipping insertion in model container [2018-12-09 11:32:00,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 11:32:00,401 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 11:32:00,487 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 11:32:00,490 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 11:32:00,500 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 11:32:00,508 INFO L195 MainTranslator]: Completed translation [2018-12-09 11:32:00,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00 WrapperNode [2018-12-09 11:32:00,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 11:32:00,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 11:32:00,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 11:32:00,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 11:32:00,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 11:32:00,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 11:32:00,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 11:32:00,521 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 11:32:00,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... [2018-12-09 11:32:00,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 11:32:00,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 11:32:00,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 11:32:00,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 11:32:00,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 11:32:00,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 11:32:00,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 11:32:00,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 11:32:00,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 11:32:00,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 11:32:00,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 11:32:00,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 11:32:00,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 11:32:00,696 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 11:32:00,697 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 11:32:00,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:32:00 BoogieIcfgContainer [2018-12-09 11:32:00,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 11:32:00,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 11:32:00,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 11:32:00,700 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 11:32:00,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:32:00" (1/3) ... [2018-12-09 11:32:00,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d37b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:32:00, skipping insertion in model container [2018-12-09 11:32:00,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:32:00" (2/3) ... [2018-12-09 11:32:00,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11d37b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:32:00, skipping insertion in model container [2018-12-09 11:32:00,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:32:00" (3/3) ... [2018-12-09 11:32:00,703 INFO L112 eAbstractionObserver]: Analyzing ICFG nested9_true-unreach-call_true-termination.i [2018-12-09 11:32:00,710 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 11:32:00,714 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 11:32:00,724 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 11:32:00,748 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 11:32:00,748 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 11:32:00,748 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 11:32:00,748 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 11:32:00,748 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 11:32:00,748 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 11:32:00,748 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 11:32:00,749 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 11:32:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-12-09 11:32:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 11:32:00,763 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:32:00,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:32:00,765 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:32:00,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:00,770 INFO L82 PathProgramCache]: Analyzing trace with hash -810471198, now seen corresponding path program 1 times [2018-12-09 11:32:00,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 11:32:00,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:00,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:00,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:00,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 11:32:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:00,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 11:32:00,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 11:32:00,866 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 11:32:00,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 11:32:00,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 11:32:00,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 11:32:00,878 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2018-12-09 11:32:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:32:00,923 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2018-12-09 11:32:00,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 11:32:00,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-09 11:32:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:32:00,929 INFO L225 Difference]: With dead ends: 53 [2018-12-09 11:32:00,929 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 11:32:00,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 11:32:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 11:32:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-12-09 11:32:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 11:32:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-12-09 11:32:00,952 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2018-12-09 11:32:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:32:00,952 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-12-09 11:32:00,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 11:32:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-12-09 11:32:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-09 11:32:00,953 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:32:00,953 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:32:00,953 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:32:00,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:00,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1809643041, now seen corresponding path program 1 times [2018-12-09 11:32:00,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 11:32:00,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:00,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:00,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:00,955 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 11:32:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 11:32:01,022 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-09 11:32:01,024 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [48], [59], [65], [68], [70], [76], [77], [78], [80] [2018-12-09 11:32:01,044 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 11:32:01,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 11:32:01,131 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 11:32:01,132 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Merged at 2 different actions 2 times. Never widened. Performed 79 root evaluator evaluations with a maximum evaluation depth of 4. Performed 79 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 12 variables. [2018-12-09 11:32:01,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 11:32:01,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:32:01,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,145 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 11:32:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:32:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 11:32:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 11:32:01,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 16 [2018-12-09 11:32:01,323 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 11:32:01,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 11:32:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 11:32:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-12-09 11:32:01,324 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2018-12-09 11:32:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:32:01,371 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-12-09 11:32:01,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 11:32:01,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-12-09 11:32:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:32:01,372 INFO L225 Difference]: With dead ends: 39 [2018-12-09 11:32:01,372 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 11:32:01,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-12-09 11:32:01,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 11:32:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-12-09 11:32:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 11:32:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-12-09 11:32:01,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2018-12-09 11:32:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:32:01,377 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-12-09 11:32:01,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 11:32:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-12-09 11:32:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 11:32:01,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:32:01,377 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:32:01,378 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:32:01,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2040308290, now seen corresponding path program 1 times [2018-12-09 11:32:01,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 11:32:01,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 11:32:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,426 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 11:32:01,426 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-09 11:32:01,426 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [48], [51], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2018-12-09 11:32:01,427 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 11:32:01,427 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 11:32:01,458 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 11:32:01,458 INFO L272 AbstractInterpreter]: Visited 24 different actions 28 times. Merged at 3 different actions 3 times. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 4. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 13 variables. [2018-12-09 11:32:01,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 11:32:01,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,461 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:32:01,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 11:32:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:32:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 11:32:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:32:01,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 11:32:01,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2018-12-09 11:32:01,543 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 11:32:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 11:32:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 11:32:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-09 11:32:01,544 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2018-12-09 11:32:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:32:01,651 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-12-09 11:32:01,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 11:32:01,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-12-09 11:32:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:32:01,653 INFO L225 Difference]: With dead ends: 65 [2018-12-09 11:32:01,654 INFO L226 Difference]: Without dead ends: 46 [2018-12-09 11:32:01,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-12-09 11:32:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-09 11:32:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2018-12-09 11:32:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 11:32:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2018-12-09 11:32:01,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2018-12-09 11:32:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:32:01,662 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2018-12-09 11:32:01,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 11:32:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2018-12-09 11:32:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 11:32:01,663 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:32:01,663 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:32:01,664 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:32:01,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash 911329064, now seen corresponding path program 1 times [2018-12-09 11:32:01,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 11:32:01,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,665 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 11:32:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 11:32:01,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,701 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 11:32:01,701 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-12-09 11:32:01,701 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [46], [48], [51], [55], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2018-12-09 11:32:01,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 11:32:01,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 11:32:01,757 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 11:32:01,757 INFO L272 AbstractInterpreter]: Visited 26 different actions 74 times. Merged at 9 different actions 22 times. Widened at 2 different actions 2 times. Performed 213 root evaluator evaluations with a maximum evaluation depth of 4. Performed 213 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 9 fixpoints after 6 different actions. Largest state had 14 variables. [2018-12-09 11:32:01,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 11:32:01,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,761 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:32:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,767 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 11:32:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:32:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 11:32:01,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 11:32:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 11:32:01,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 11:32:01,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-12-09 11:32:01,844 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 11:32:01,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 11:32:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 11:32:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-12-09 11:32:01,845 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2018-12-09 11:32:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:32:01,884 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2018-12-09 11:32:01,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 11:32:01,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-12-09 11:32:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:32:01,885 INFO L225 Difference]: With dead ends: 68 [2018-12-09 11:32:01,885 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 11:32:01,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-09 11:32:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 11:32:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2018-12-09 11:32:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 11:32:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-12-09 11:32:01,890 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2018-12-09 11:32:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:32:01,890 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-12-09 11:32:01,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 11:32:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-12-09 11:32:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 11:32:01,891 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:32:01,891 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:32:01,891 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:32:01,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:32:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash -973854811, now seen corresponding path program 2 times [2018-12-09 11:32:01,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 11:32:01,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:32:01,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:32:01,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 11:32:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:32:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 11:32:01,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,984 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 11:32:01,984 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 11:32:01,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 11:32:01,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:32:01,984 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:32:01,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 11:32:01,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 11:32:01,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 11:32:01,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 11:32:01,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:32:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-09 11:32:02,066 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 11:32:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-09 11:32:02,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 11:32:02,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2018-12-09 11:32:02,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 11:32:02,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 11:32:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 11:32:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2018-12-09 11:32:02,123 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 16 states. [2018-12-09 11:32:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:32:02,422 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2018-12-09 11:32:02,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 11:32:02,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2018-12-09 11:32:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:32:02,423 INFO L225 Difference]: With dead ends: 79 [2018-12-09 11:32:02,423 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 11:32:02,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 11:32:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 11:32:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 11:32:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 11:32:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 11:32:02,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2018-12-09 11:32:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:32:02,425 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 11:32:02,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 11:32:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 11:32:02,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 11:32:02,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 11:32:02,620 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-09 11:32:02,620 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 11:32:02,621 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 26) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse2 (* 3 main_~i~0))) (let ((.cse0 (< main_~i~0 main_~n~0)) (.cse1 (<= (+ main_~k~0 2) .cse2))) (or (and (exists ((main_~i~0 Int)) (and (<= main_~j~0 (* 2 main_~i~0)) (<= main_~i~0 1) (<= main_~i~0 main_~k~0))) .cse0 (exists ((main_~i~0 Int)) (and (<= 1 main_~i~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~i~0))) (<= main_~i~0 1) .cse1) (and (<= 2 main_~i~0) (< main_~j~0 .cse2) .cse0 (<= (* 2 main_~i~0) main_~j~0) .cse1)))) [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 22 23) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L451 ceAbstractionStarter]: At program point L24(lines 11 26) the Hoare annotation is: true [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L444 ceAbstractionStarter]: At program point L20-3(lines 20 23) the Hoare annotation is: (or (and (<= 1 main_~i~0) (<= main_~j~0 (* 2 main_~i~0))) (<= 2 main_~i~0) (and (<= 0 main_~i~0) (<= main_~i~0 0))) [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L448 ceAbstractionStarter]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2018-12-09 11:32:02,621 INFO L444 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (let ((.cse4 (* 2 main_~i~0))) (let ((.cse0 (<= 1 main_~i~0)) (.cse3 (<= main_~j~0 .cse4)) (.cse1 (< main_~i~0 main_~n~0)) (.cse2 (<= .cse4 main_~j~0))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse0 .cse1 (<= main_~j~0 (+ main_~k~0 1)) .cse2) (and (<= (* 3 main_~i~0) main_~j~0) (<= 0 main_~i~0) .cse1 .cse3) (and (<= 2 main_~i~0) .cse1 .cse2)))) [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 11 26) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 26) the Hoare annotation is: true [2018-12-09 11:32:02,622 INFO L444 ceAbstractionStarter]: At program point L22-2(lines 22 23) the Hoare annotation is: (let ((.cse1 (* 3 main_~i~0)) (.cse0 (< main_~i~0 main_~n~0)) (.cse2 (<= (* 2 main_~i~0) main_~j~0))) (or (and (exists ((main_~i~0 Int)) (and (<= main_~j~0 (* 2 main_~i~0)) (<= main_~i~0 1) (<= main_~i~0 main_~k~0))) .cse0 (exists ((main_~i~0 Int)) (and (<= 1 main_~i~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~i~0))) (<= main_~i~0 1) (<= (+ main_~k~0 2) .cse1)) (and (<= 2 main_~i~0) (< main_~j~0 .cse1) .cse0 .cse2) (and (<= 1 main_~i~0) (exists ((main_~i~0 Int)) (and (<= main_~j~0 (* 2 main_~i~0)) (<= main_~i~0 1) (<= (+ main_~i~0 1) main_~k~0))) .cse0 .cse2))) [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-09 11:32:02,622 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-09 11:32:02,630 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,631 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,632 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,633 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:32:02 BoogieIcfgContainer [2018-12-09 11:32:02,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 11:32:02,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 11:32:02,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 11:32:02,634 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 11:32:02,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:32:00" (3/4) ... [2018-12-09 11:32:02,637 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 11:32:02,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 11:32:02,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 11:32:02,640 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 11:32:02,642 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-12-09 11:32:02,642 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 11:32:02,642 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 11:32:02,643 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 11:32:02,658 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((\exists main_~i~0 : int :: (j <= 2 * main_~i~0 && main_~i~0 <= 1) && main_~i~0 <= k) && i < n) && (\exists main_~i~0 : int :: (1 <= main_~i~0 && 2 * main_~i~0 <= j) && k <= main_~i~0)) && i <= 1) && k + 2 <= 3 * i) || (((2 <= i && j < 3 * i) && i < n) && 2 * i <= j)) || (((1 <= i && (\exists main_~i~0 : int :: (j <= 2 * main_~i~0 && main_~i~0 <= 1) && main_~i~0 + 1 <= k)) && i < n) && 2 * i <= j) [2018-12-09 11:32:02,667 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_844dfc12-0cae-4a99-a8bb-c8c2fc1c446b/bin-2019/utaipan/witness.graphml [2018-12-09 11:32:02,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 11:32:02,668 INFO L168 Benchmark]: Toolchain (without parser) took 2285.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 956.0 MB in the beginning and 987.6 MB in the end (delta: -31.7 MB). Peak memory consumption was 81.6 MB. Max. memory is 11.5 GB. [2018-12-09 11:32:02,669 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:32:02,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.92 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 944.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-09 11:32:02,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.82 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:32:02,669 INFO L168 Benchmark]: Boogie Preprocessor took 12.57 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 938.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 11:32:02,669 INFO L168 Benchmark]: RCFGBuilder took 163.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-09 11:32:02,670 INFO L168 Benchmark]: TraceAbstraction took 1936.09 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 987.6 MB in the end (delta: 103.9 MB). Peak memory consumption was 103.9 MB. Max. memory is 11.5 GB. [2018-12-09 11:32:02,670 INFO L168 Benchmark]: Witness Printer took 33.47 ms. Allocated memory is still 1.1 GB. Free memory is still 987.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:32:02,671 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 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.92 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 944.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.82 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.57 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 938.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.2 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1936.09 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 987.6 MB in the end (delta: 103.9 MB). Peak memory consumption was 103.9 MB. Max. memory is 11.5 GB. * Witness Printer took 33.47 ms. Allocated memory is still 1.1 GB. Free memory is still 987.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] * 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: 20]: Loop Invariant Derived loop invariant: ((1 <= i && j <= 2 * i) || 2 <= i) || (0 <= i && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((1 <= i && i < n) && 2 * i <= j) && j <= 2 * i) || (((1 <= i && i < n) && j <= k + 1) && 2 * i <= j)) || (((3 * i <= j && 0 <= i) && i < n) && j <= 2 * i)) || ((2 <= i && i < n) && 2 * i <= j) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,674 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,675 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,676 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] [2018-12-09 11:32:02,676 WARN L416 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~i~0,QUANTIFIED] Derived loop invariant: ((((((\exists main_~i~0 : int :: (j <= 2 * main_~i~0 && main_~i~0 <= 1) && main_~i~0 <= k) && i < n) && (\exists main_~i~0 : int :: (1 <= main_~i~0 && 2 * main_~i~0 <= j) && k <= main_~i~0)) && i <= 1) && k + 2 <= 3 * i) || (((2 <= i && j < 3 * i) && i < n) && 2 * i <= j)) || (((1 <= i && (\exists main_~i~0 : int :: (j <= 2 * main_~i~0 && main_~i~0 <= 1) && main_~i~0 + 1 <= k)) && i < n) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 104 SDtfs, 123 SDslu, 343 SDs, 0 SdLazy, 483 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 306 GetRequests, 225 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 22 PreInvPairs, 45 NumberOfFragments, 240 HoareAnnotationTreeSize, 22 FomulaSimplifications, 503 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 85 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 266 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 377 ConstructedInterpolants, 9 QuantifiedInterpolants, 27195 SizeOfPredicates, 16 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 127/156 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...