./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_false-unreach-call2_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_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 c0ad4658b31654787cb281a441e891421d607e94 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2018-12-08 15:40:05,855 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:40:05,856 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:40:05,862 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:40:05,862 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:40:05,863 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:40:05,863 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:40:05,864 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:40:05,865 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:40:05,866 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:40:05,866 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:40:05,866 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:40:05,867 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:40:05,867 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:40:05,868 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:40:05,868 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:40:05,869 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:40:05,870 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:40:05,871 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:40:05,871 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:40:05,872 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:40:05,873 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:40:05,874 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:40:05,874 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:40:05,874 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:40:05,875 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:40:05,875 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:40:05,875 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:40:05,876 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:40:05,876 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:40:05,877 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:40:05,877 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:40:05,877 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:40:05,877 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:40:05,878 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:40:05,878 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:40:05,878 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 15:40:05,886 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:40:05,886 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:40:05,886 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:40:05,886 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:40:05,886 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 15:40:05,887 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 15:40:05,887 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 15:40:05,888 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:40:05,888 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 15:40:05,889 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:40:05,889 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 15:40:05,889 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 15:40:05,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:40:05,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 15:40:05,890 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 15:40:05,890 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_736448bc-ed20-4ad2-a254-449d3770cc33/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 -> c0ad4658b31654787cb281a441e891421d607e94 [2018-12-08 15:40:05,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:40:05,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:40:05,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:40:05,917 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:40:05,917 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:40:05,917 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-12-08 15:40:05,951 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/data/63dee44c3/a874ed02411945f38109b69e24bff7a2/FLAGf7d391193 [2018-12-08 15:40:06,378 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:40:06,378 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/sv-benchmarks/c/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-12-08 15:40:06,381 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/data/63dee44c3/a874ed02411945f38109b69e24bff7a2/FLAGf7d391193 [2018-12-08 15:40:06,389 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/data/63dee44c3/a874ed02411945f38109b69e24bff7a2 [2018-12-08 15:40:06,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:40:06,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 15:40:06,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:40:06,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:40:06,394 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:40:06,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e0d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06, skipping insertion in model container [2018-12-08 15:40:06,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:40:06,408 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:40:06,488 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:40:06,490 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:40:06,498 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:40:06,506 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:40:06,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06 WrapperNode [2018-12-08 15:40:06,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:40:06,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 15:40:06,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 15:40:06,507 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 15:40:06,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 15:40:06,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:40:06,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:40:06,518 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:40:06,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... [2018-12-08 15:40:06,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:40:06,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:40:06,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:40:06,530 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:40:06,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 [2018-12-08 15:40:06,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:40:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:40:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:40:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:40:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:40:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:40:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 15:40:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 15:40:06,671 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:40:06,671 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 15:40:06,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:40:06 BoogieIcfgContainer [2018-12-08 15:40:06,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:40:06,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:40:06,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:40:06,674 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:40:06,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:40:06" (1/3) ... [2018-12-08 15:40:06,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51864981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:40:06, skipping insertion in model container [2018-12-08 15:40:06,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:40:06" (2/3) ... [2018-12-08 15:40:06,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51864981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:40:06, skipping insertion in model container [2018-12-08 15:40:06,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:40:06" (3/3) ... [2018-12-08 15:40:06,676 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call2_true-termination.i [2018-12-08 15:40:06,682 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:40:06,686 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 15:40:06,695 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 15:40:06,713 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:40:06,714 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 15:40:06,714 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:40:06,714 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:40:06,714 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:40:06,714 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:40:06,714 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:40:06,714 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:40:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-12-08 15:40:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 15:40:06,728 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:06,728 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:06,730 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:06,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2018-12-08 15:40:06,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:06,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:06,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:06,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:06,763 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:06,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:40:06,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 15:40:06,840 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:40:06,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:40:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:40:06,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:40:06,853 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-12-08 15:40:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:06,869 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2018-12-08 15:40:06,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:40:06,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-08 15:40:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:06,876 INFO L225 Difference]: With dead ends: 29 [2018-12-08 15:40:06,876 INFO L226 Difference]: Without dead ends: 12 [2018-12-08 15:40:06,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:40:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-08 15:40:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-08 15:40:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-08 15:40:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-08 15:40:06,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-08 15:40:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:06,898 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-08 15:40:06,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:40:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-08 15:40:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-08 15:40:06,899 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:06,899 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:06,899 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:06,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2018-12-08 15:40:06,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:06,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:06,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:06,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:06,900 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:06,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:06,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:40:06,949 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2018-12-08 15:40:06,950 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2018-12-08 15:40:06,969 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:40:06,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:40:07,053 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:40:07,054 INFO L272 AbstractInterpreter]: Visited 11 different actions 17 times. Merged at 1 different actions 3 times. Never widened. Performed 61 root evaluator evaluations with a maximum evaluation depth of 6. Performed 61 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 2 fixpoints after 2 different actions. Largest state had 3 variables. [2018-12-08 15:40:07,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:40:07,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,060 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 [2018-12-08 15:40:07,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:07,066 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:40:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:40:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:40:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:40:07,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2018-12-08 15:40:07,146 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:40:07,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:40:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:40:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:40:07,147 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-12-08 15:40:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:07,161 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-08 15:40:07,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 15:40:07,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-08 15:40:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:07,162 INFO L225 Difference]: With dead ends: 18 [2018-12-08 15:40:07,162 INFO L226 Difference]: Without dead ends: 13 [2018-12-08 15:40:07,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:40:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-08 15:40:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-08 15:40:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-08 15:40:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-08 15:40:07,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-12-08 15:40:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:07,166 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-08 15:40:07,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:40:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-08 15:40:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 15:40:07,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:07,166 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:07,167 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:07,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2018-12-08 15:40:07,167 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:07,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:07,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,168 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:40:07,215 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:40:07,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:40:07,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 [2018-12-08 15:40:07,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:40:07,221 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 15:40:07,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-08 15:40:07,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:40:07,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:40:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:40:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:40:07,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 11 [2018-12-08 15:40:07,335 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:40:07,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:40:07,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:40:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-12-08 15:40:07,336 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-12-08 15:40:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:07,349 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-12-08 15:40:07,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:40:07,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-08 15:40:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:07,350 INFO L225 Difference]: With dead ends: 19 [2018-12-08 15:40:07,350 INFO L226 Difference]: Without dead ends: 14 [2018-12-08 15:40:07,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-12-08 15:40:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-08 15:40:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-08 15:40:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-08 15:40:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-12-08 15:40:07,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-12-08 15:40:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:07,352 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-12-08 15:40:07,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:40:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-12-08 15:40:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 15:40:07,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:07,353 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:07,353 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:07,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2018-12-08 15:40:07,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:07,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:40:07,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,354 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,400 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:40:07,400 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:40:07,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:40:07,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,400 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 [2018-12-08 15:40:07,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:40:07,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 15:40:07,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:40:07,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:40:07,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:40:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:40:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:40:07,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 13 [2018-12-08 15:40:07,519 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:40:07,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 15:40:07,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 15:40:07,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-12-08 15:40:07,519 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-12-08 15:40:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:07,536 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-12-08 15:40:07,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 15:40:07,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-12-08 15:40:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:07,536 INFO L225 Difference]: With dead ends: 20 [2018-12-08 15:40:07,536 INFO L226 Difference]: Without dead ends: 15 [2018-12-08 15:40:07,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-12-08 15:40:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-08 15:40:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-08 15:40:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-08 15:40:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-08 15:40:07,539 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-12-08 15:40:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:07,539 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-08 15:40:07,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 15:40:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-08 15:40:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 15:40:07,539 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:07,540 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:07,540 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:07,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2018-12-08 15:40:07,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:07,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:40:07,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,541 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,588 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:40:07,589 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:40:07,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:40:07,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,589 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/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 [2018-12-08 15:40:07,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:07,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:40:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:40:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:40:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:40:07,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 15 [2018-12-08 15:40:07,712 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:40:07,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 15:40:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 15:40:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-12-08 15:40:07,712 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-12-08 15:40:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:07,736 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-08 15:40:07,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 15:40:07,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-12-08 15:40:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:07,736 INFO L225 Difference]: With dead ends: 21 [2018-12-08 15:40:07,736 INFO L226 Difference]: Without dead ends: 16 [2018-12-08 15:40:07,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-12-08 15:40:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-08 15:40:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-08 15:40:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 15:40:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-08 15:40:07,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-12-08 15:40:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:07,739 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-08 15:40:07,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 15:40:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-08 15:40:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-08 15:40:07,739 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:07,739 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:07,740 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:07,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2018-12-08 15:40:07,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:07,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:40:07,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,741 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:40:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:40:07,800 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:40:07,800 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:40:07,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:40:07,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:40:07,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:40:07,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 15:40:07,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 15:40:07,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:40:07,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:40:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:40:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:40:07,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:40:07,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 17 [2018-12-08 15:40:07,945 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:40:07,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 15:40:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 15:40:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-12-08 15:40:07,946 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2018-12-08 15:40:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:40:07,970 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-08 15:40:07,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 15:40:07,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-12-08 15:40:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:40:07,971 INFO L225 Difference]: With dead ends: 22 [2018-12-08 15:40:07,971 INFO L226 Difference]: Without dead ends: 17 [2018-12-08 15:40:07,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-12-08 15:40:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-08 15:40:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-08 15:40:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 15:40:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-08 15:40:07,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-12-08 15:40:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:40:07,974 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-08 15:40:07,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 15:40:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-08 15:40:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 15:40:07,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:40:07,974 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:40:07,975 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:40:07,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:40:07,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2018-12-08 15:40:07,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:40:07,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:40:07,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:40:07,976 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:40:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:40:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:40:07,999 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 15:40:08,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:40:08 BoogieIcfgContainer [2018-12-08 15:40:08,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:40:08,016 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:40:08,016 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:40:08,016 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:40:08,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:40:06" (3/4) ... [2018-12-08 15:40:08,017 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 15:40:08,044 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_736448bc-ed20-4ad2-a254-449d3770cc33/bin-2019/utaipan/witness.graphml [2018-12-08 15:40:08,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:40:08,045 INFO L168 Benchmark]: Toolchain (without parser) took 1653.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 962.0 MB in the beginning and 873.5 MB in the end (delta: 88.6 MB). Peak memory consumption was 213.9 MB. Max. memory is 11.5 GB. [2018-12-08 15:40:08,046 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:40:08,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 114.36 ms. Allocated memory is still 1.0 GB. Free memory was 962.0 MB in the beginning and 951.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:40:08,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.39 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:40:08,046 INFO L168 Benchmark]: Boogie Preprocessor took 11.46 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:40:08,046 INFO L168 Benchmark]: RCFGBuilder took 141.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -152.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-08 15:40:08,047 INFO L168 Benchmark]: TraceAbstraction took 1343.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 880.4 MB in the end (delta: 223.7 MB). Peak memory consumption was 223.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:40:08,047 INFO L168 Benchmark]: Witness Printer took 28.79 ms. Allocated memory is still 1.2 GB. Free memory was 880.4 MB in the beginning and 873.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2018-12-08 15:40:08,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 114.36 ms. Allocated memory is still 1.0 GB. Free memory was 962.0 MB in the beginning and 951.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.39 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.46 ms. Allocated memory is still 1.0 GB. Free memory is still 951.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -152.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1343.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 880.4 MB in the end (delta: 223.7 MB). Peak memory consumption was 223.7 MB. Max. memory is 11.5 GB. * Witness Printer took 28.79 ms. Allocated memory is still 1.2 GB. Free memory was 880.4 MB in the beginning and 873.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; VAL [x=0, y=1] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=1, y=2] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=2, y=4] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=3, y=8] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=4, y=16] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=5, y=32] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=6, y=64] [L11] COND FALSE !(x < 6) VAL [x=6, y=64] [L15] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 190 SDs, 0 SdLazy, 137 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 87 SyntacticMatches, 21 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 7855 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...