./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c --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_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/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 9b6c190b845f4496788acb9553cb85e1e7dace14 ............................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 01:09:22,704 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 01:09:22,705 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 01:09:22,711 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 01:09:22,711 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 01:09:22,712 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 01:09:22,712 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 01:09:22,713 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 01:09:22,714 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 01:09:22,714 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 01:09:22,714 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 01:09:22,715 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 01:09:22,715 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 01:09:22,715 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 01:09:22,716 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 01:09:22,716 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 01:09:22,717 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 01:09:22,717 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 01:09:22,718 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 01:09:22,719 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 01:09:22,719 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 01:09:22,720 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 01:09:22,721 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 01:09:22,721 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 01:09:22,721 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 01:09:22,721 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 01:09:22,722 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 01:09:22,722 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 01:09:22,723 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 01:09:22,723 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 01:09:22,723 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 01:09:22,724 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 01:09:22,724 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 01:09:22,724 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 01:09:22,724 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 01:09:22,725 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 01:09:22,725 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 01:09:22,731 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 01:09:22,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 01:09:22,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 01:09:22,732 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 01:09:22,732 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 01:09:22,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 01:09:22,732 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 01:09:22,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 01:09:22,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 01:09:22,733 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 01:09:22,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 01:09:22,734 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 01:09:22,735 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 01:09:22,735 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 01:09:22,735 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_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/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 -> 9b6c190b845f4496788acb9553cb85e1e7dace14 [2018-12-09 01:09:22,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 01:09:22,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 01:09:22,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 01:09:22,761 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 01:09:22,761 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 01:09:22,761 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-09 01:09:22,795 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/data/9b145633a/70966f4271524be39dc74ac83fed3932/FLAG84fa333fc [2018-12-09 01:09:23,140 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 01:09:23,141 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-09 01:09:23,145 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/data/9b145633a/70966f4271524be39dc74ac83fed3932/FLAG84fa333fc [2018-12-09 01:09:23,533 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/data/9b145633a/70966f4271524be39dc74ac83fed3932 [2018-12-09 01:09:23,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 01:09:23,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 01:09:23,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 01:09:23,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 01:09:23,541 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 01:09:23,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73973e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23, skipping insertion in model container [2018-12-09 01:09:23,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 01:09:23,556 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 01:09:23,639 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:09:23,641 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 01:09:23,649 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 01:09:23,656 INFO L195 MainTranslator]: Completed translation [2018-12-09 01:09:23,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23 WrapperNode [2018-12-09 01:09:23,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 01:09:23,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 01:09:23,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 01:09:23,657 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 01:09:23,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 01:09:23,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 01:09:23,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 01:09:23,668 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 01:09:23,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... [2018-12-09 01:09:23,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 01:09:23,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 01:09:23,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 01:09:23,678 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 01:09:23,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/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 01:09:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 01:09:23,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 01:09:23,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 01:09:23,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 01:09:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 01:09:23,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 01:09:23,745 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-09 01:09:23,745 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-09 01:09:23,821 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 01:09:23,821 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 01:09:23,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:09:23 BoogieIcfgContainer [2018-12-09 01:09:23,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 01:09:23,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 01:09:23,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 01:09:23,824 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 01:09:23,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:09:23" (1/3) ... [2018-12-09 01:09:23,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54448987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:09:23, skipping insertion in model container [2018-12-09 01:09:23,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:09:23" (2/3) ... [2018-12-09 01:09:23,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54448987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:09:23, skipping insertion in model container [2018-12-09 01:09:23,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:09:23" (3/3) ... [2018-12-09 01:09:23,826 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-09 01:09:23,831 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 01:09:23,835 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 01:09:23,843 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 01:09:23,860 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 01:09:23,860 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 01:09:23,860 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 01:09:23,860 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 01:09:23,860 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 01:09:23,861 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 01:09:23,861 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 01:09:23,861 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 01:09:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 01:09:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 01:09:23,874 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:09:23,874 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:09:23,875 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:09:23,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:09:23,879 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-09 01:09:23,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:09:23,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:23,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:09:23,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:23,908 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:09:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:09:23,999 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 01:09:24,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 01:09:24,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 01:09:24,001 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 01:09:24,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 01:09:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 01:09:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:09:24,013 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-09 01:09:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:09:24,035 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-12-09 01:09:24,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 01:09:24,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 01:09:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:09:24,042 INFO L225 Difference]: With dead ends: 32 [2018-12-09 01:09:24,042 INFO L226 Difference]: Without dead ends: 18 [2018-12-09 01:09:24,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 01:09:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-09 01:09:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-09 01:09:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 01:09:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 01:09:24,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-09 01:09:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:09:24,067 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 01:09:24,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 01:09:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 01:09:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 01:09:24,068 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:09:24,068 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:09:24,068 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:09:24,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:09:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-09 01:09:24,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:09:24,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:09:24,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,069 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:09:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:09:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 01:09:24,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:09:24,132 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:09:24,132 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 01:09:24,133 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-12-09 01:09:24,153 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 01:09:24,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 01:09:24,250 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 01:09:24,251 INFO L272 AbstractInterpreter]: Visited 17 different actions 57 times. Merged at 5 different actions 21 times. Never widened. Performed 80 root evaluator evaluations with a maximum evaluation depth of 3. Performed 80 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 4 variables. [2018-12-09 01:09:24,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:09:24,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 01:09:24,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:09:24,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/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 01:09:24,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:09:24,266 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 01:09:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:09:24,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:09:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 01:09:24,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:09:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 01:09:24,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 01:09:24,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 01:09:24,397 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 01:09:24,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 01:09:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 01:09:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-09 01:09:24,398 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-12-09 01:09:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:09:24,413 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-09 01:09:24,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 01:09:24,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-12-09 01:09:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:09:24,414 INFO L225 Difference]: With dead ends: 25 [2018-12-09 01:09:24,414 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 01:09:24,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-09 01:09:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 01:09:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-09 01:09:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 01:09:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 01:09:24,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-09 01:09:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:09:24,418 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 01:09:24,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 01:09:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 01:09:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 01:09:24,419 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:09:24,419 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:09:24,419 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:09:24,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:09:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-09 01:09:24,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:09:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 01:09:24,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,420 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:09:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 01:09:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 01:09:24,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:09:24,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 01:09:24,488 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 01:09:24,488 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 01:09:24,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 01:09:24,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/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 01:09:24,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 01:09:24,496 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 01:09:24,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 01:09:24,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 01:09:24,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 01:09:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 01:09:24,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 01:09:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 01:09:24,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 01:09:24,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-09 01:09:24,691 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 01:09:24,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 01:09:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 01:09:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 01:09:24,692 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-12-09 01:09:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 01:09:24,718 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-09 01:09:24,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 01:09:24,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-12-09 01:09:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 01:09:24,719 INFO L225 Difference]: With dead ends: 28 [2018-12-09 01:09:24,719 INFO L226 Difference]: Without dead ends: 24 [2018-12-09 01:09:24,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 01:09:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-09 01:09:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-09 01:09:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 01:09:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-09 01:09:24,722 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-09 01:09:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 01:09:24,722 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-09 01:09:24,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 01:09:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-09 01:09:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 01:09:24,723 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 01:09:24,723 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 01:09:24,723 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 01:09:24,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 01:09:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-09 01:09:24,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 01:09:24,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 01:09:24,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 01:09:24,724 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 01:09:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 01:09:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 01:09:24,762 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 01:09:24,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:09:24 BoogieIcfgContainer [2018-12-09 01:09:24,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 01:09:24,778 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 01:09:24,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 01:09:24,778 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 01:09:24,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:09:23" (3/4) ... [2018-12-09 01:09:24,779 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 01:09:24,812 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_836ac27e-12e4-4d96-9a65-4ac9c14e9c2c/bin-2019/utaipan/witness.graphml [2018-12-09 01:09:24,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 01:09:24,813 INFO L168 Benchmark]: Toolchain (without parser) took 1275.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 72.4 MB). Free memory was 949.7 MB in the beginning and 898.9 MB in the end (delta: 50.7 MB). Peak memory consumption was 123.1 MB. Max. memory is 11.5 GB. [2018-12-09 01:09:24,814 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:09:24,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.50 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 941.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-12-09 01:09:24,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:09:24,816 INFO L168 Benchmark]: Boogie Preprocessor took 9.47 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 01:09:24,816 INFO L168 Benchmark]: RCFGBuilder took 144.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 72.4 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -112.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-12-09 01:09:24,816 INFO L168 Benchmark]: TraceAbstraction took 955.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 902.5 MB in the end (delta: 149.4 MB). Peak memory consumption was 149.4 MB. Max. memory is 11.5 GB. [2018-12-09 01:09:24,817 INFO L168 Benchmark]: Witness Printer took 34.96 ms. Allocated memory is still 1.1 GB. Free memory was 902.5 MB in the beginning and 898.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-12-09 01:09:24,819 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.50 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 941.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.47 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 144.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 72.4 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -112.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 955.24 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 902.5 MB in the end (delta: 149.4 MB). Peak memory consumption was 149.4 MB. Max. memory is 11.5 GB. * Witness Printer took 34.96 ms. Allocated memory is still 1.1 GB. Free memory was 902.5 MB in the beginning and 898.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=3, input=3] [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 VAL [input=3, result=3] [L13] __VERIFIER_error() VAL [input=3, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 2 SDslu, 270 SDs, 0 SdLazy, 58 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 9966 SizeOfPredicates, 2 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 27/54 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...