./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:44:22,839 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:44:22,840 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:44:22,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:44:22,848 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:44:22,848 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:44:22,849 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:44:22,850 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:44:22,851 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:44:22,851 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:44:22,852 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:44:22,852 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:44:22,853 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:44:22,854 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:44:22,854 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:44:22,855 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:44:22,855 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:44:22,857 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:44:22,858 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:44:22,859 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:44:22,860 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:44:22,860 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:44:22,862 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:44:22,862 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:44:22,862 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:44:22,863 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:44:22,864 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:44:22,864 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:44:22,865 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:44:22,866 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:44:22,866 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:44:22,866 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:44:22,866 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:44:22,867 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:44:22,867 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:44:22,868 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:44:22,868 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 04:44:22,878 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:44:22,878 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:44:22,879 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:44:22,879 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:44:22,879 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:44:22,879 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:44:22,879 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:44:22,879 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:44:22,880 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:44:22,880 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:44:22,880 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:44:22,880 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:44:22,880 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:44:22,880 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:44:22,881 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:44:22,882 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:44:22,882 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:44:22,882 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 04:44:22,883 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_8ec3f998-6923-494f-a829-dfc0e0800c07/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2018-11-10 04:44:22,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:44:22,911 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:44:22,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:44:22,914 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:44:22,914 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:44:22,915 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-11-10 04:44:22,950 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/data/e51b98ab7/3841c187e1d24c7db9087439a333139a/FLAG9cede9dd4 [2018-11-10 04:44:23,359 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:44:23,360 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-11-10 04:44:23,364 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/data/e51b98ab7/3841c187e1d24c7db9087439a333139a/FLAG9cede9dd4 [2018-11-10 04:44:23,373 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/data/e51b98ab7/3841c187e1d24c7db9087439a333139a [2018-11-10 04:44:23,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:44:23,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:44:23,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:44:23,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:44:23,379 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:44:23,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ca410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23, skipping insertion in model container [2018-11-10 04:44:23,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:44:23,398 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:44:23,496 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:44:23,499 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:44:23,509 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:44:23,517 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:44:23,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23 WrapperNode [2018-11-10 04:44:23,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:44:23,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:44:23,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:44:23,518 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:44:23,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:44:23,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:44:23,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:44:23,530 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:44:23,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... [2018-11-10 04:44:23,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:44:23,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:44:23,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:44:23,541 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:44:23,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:44:23,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:44:23,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:44:23,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:44:23,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:44:23,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:44:23,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:44:23,611 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-10 04:44:23,611 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-10 04:44:23,611 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-10 04:44:23,611 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-10 04:44:23,719 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:44:23,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:23 BoogieIcfgContainer [2018-11-10 04:44:23,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:44:23,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:44:23,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:44:23,722 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:44:23,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:44:23" (1/3) ... [2018-11-10 04:44:23,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511e690b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:44:23, skipping insertion in model container [2018-11-10 04:44:23,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:44:23" (2/3) ... [2018-11-10 04:44:23,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511e690b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:44:23, skipping insertion in model container [2018-11-10 04:44:23,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:23" (3/3) ... [2018-11-10 04:44:23,724 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_true-unreach-call_true-termination.c [2018-11-10 04:44:23,730 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:44:23,735 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 04:44:23,743 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 04:44:23,764 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:44:23,764 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:44:23,764 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:44:23,765 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:44:23,765 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:44:23,765 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:44:23,765 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:44:23,765 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:44:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 04:44:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:44:23,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:23,785 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:23,787 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:23,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-10 04:44:23,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:23,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:23,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:44:23,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:44:23,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 04:44:23,909 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:23,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 04:44:23,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 04:44:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:44:23,921 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-10 04:44:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:24,001 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-10 04:44:24,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:44:24,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 04:44:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:24,008 INFO L225 Difference]: With dead ends: 44 [2018-11-10 04:44:24,008 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 04:44:24,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 04:44:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 04:44:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 04:44:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 04:44:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 04:44:24,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-10 04:44:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:24,044 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 04:44:24,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 04:44:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 04:44:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 04:44:24,045 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:24,045 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:24,046 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:24,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-10 04:44:24,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,047 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:44:24,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:44:24,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 04:44:24,093 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:24,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 04:44:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 04:44:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:44:24,094 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-10 04:44:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:24,167 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-10 04:44:24,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:44:24,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 04:44:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:24,169 INFO L225 Difference]: With dead ends: 36 [2018-11-10 04:44:24,169 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 04:44:24,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 04:44:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 04:44:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-10 04:44:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 04:44:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 04:44:24,176 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-10 04:44:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:24,176 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 04:44:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 04:44:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 04:44:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 04:44:24,177 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:24,177 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:24,178 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:24,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:24,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-10 04:44:24,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:24,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:24,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 04:44:24,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:24,256 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:24,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-10 04:44:24,259 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-10 04:44:24,297 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:44:24,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:44:24,385 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 04:44:24,387 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-11-10 04:44:24,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:24,391 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 04:44:24,433 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-10 04:44:24,433 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 04:44:24,464 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-10 04:44:24,464 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 04:44:24,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 04:44:24,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-10 04:44:24,465 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:24,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 04:44:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 04:44:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 04:44:24,465 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-11-10 04:44:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:24,637 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-11-10 04:44:24,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 04:44:24,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-10 04:44:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:24,638 INFO L225 Difference]: With dead ends: 72 [2018-11-10 04:44:24,638 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 04:44:24,639 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:44:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 04:44:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-11-10 04:44:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-10 04:44:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-11-10 04:44:24,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-11-10 04:44:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:24,648 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-11-10 04:44:24,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 04:44:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-11-10 04:44:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 04:44:24,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:24,649 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:24,649 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:24,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-10 04:44:24,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:24,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:24,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:24,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 04:44:24,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:24,712 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:24,712 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-10 04:44:24,712 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-10 04:44:24,714 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:44:24,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:44:24,727 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 04:44:24,727 INFO L272 AbstractInterpreter]: Visited 16 different actions 25 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-11-10 04:44:24,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:24,730 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 04:44:24,752 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-11-10 04:44:24,752 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 04:44:24,786 INFO L415 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-11-10 04:44:24,786 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 04:44:24,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 04:44:24,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-10 04:44:24,786 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:24,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 04:44:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 04:44:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:44:24,787 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-11-10 04:44:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:25,068 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-11-10 04:44:25,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 04:44:25,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-10 04:44:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:25,069 INFO L225 Difference]: With dead ends: 87 [2018-11-10 04:44:25,069 INFO L226 Difference]: Without dead ends: 55 [2018-11-10 04:44:25,070 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:44:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-10 04:44:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-10 04:44:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-10 04:44:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-11-10 04:44:25,076 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-11-10 04:44:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-11-10 04:44:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 04:44:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-11-10 04:44:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 04:44:25,077 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:25,077 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:25,077 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:25,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-11-10 04:44:25,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:25,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:25,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:25,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:25,079 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:44:25,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:25,135 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:25,135 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 04:44:25,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 04:44:25,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:25,136 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:44:25,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 04:44:25,146 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 04:44:25,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 04:44:25,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 04:44:25,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:44:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 04:44:25,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:44:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:44:25,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:44:25,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2018-11-10 04:44:25,491 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 04:44:25,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 04:44:25,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 04:44:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:44:25,492 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-11-10 04:44:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:25,663 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-11-10 04:44:25,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:44:25,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-11-10 04:44:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:25,666 INFO L225 Difference]: With dead ends: 121 [2018-11-10 04:44:25,667 INFO L226 Difference]: Without dead ends: 76 [2018-11-10 04:44:25,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-10 04:44:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-10 04:44:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-11-10 04:44:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-10 04:44:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-10 04:44:25,678 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-11-10 04:44:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:25,678 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-10 04:44:25,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 04:44:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-10 04:44:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 04:44:25,679 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:25,679 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:25,679 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:25,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-11-10 04:44:25,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:25,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 04:44:25,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:25,680 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 04:44:25,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:25,737 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:25,737 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-11-10 04:44:25,738 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-10 04:44:25,739 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:44:25,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:44:25,779 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 04:44:25,779 INFO L272 AbstractInterpreter]: Visited 29 different actions 68 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-11-10 04:44:25,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:25,790 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 04:44:25,838 INFO L227 lantSequenceWeakener]: Weakened 34 states. On average, predicates are now at 48.04% of their original sizes. [2018-11-10 04:44:25,839 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 04:44:26,202 INFO L415 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-11-10 04:44:26,202 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 04:44:26,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 04:44:26,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [27] imperfect sequences [7] total 32 [2018-11-10 04:44:26,202 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:26,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 04:44:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 04:44:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2018-11-10 04:44:26,203 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 27 states. [2018-11-10 04:44:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:27,661 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2018-11-10 04:44:27,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 04:44:27,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2018-11-10 04:44:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:27,662 INFO L225 Difference]: With dead ends: 127 [2018-11-10 04:44:27,662 INFO L226 Difference]: Without dead ends: 86 [2018-11-10 04:44:27,663 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 04:44:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-10 04:44:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2018-11-10 04:44:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-10 04:44:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2018-11-10 04:44:27,672 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 55 [2018-11-10 04:44:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:27,673 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2018-11-10 04:44:27,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 04:44:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2018-11-10 04:44:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 04:44:27,674 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:44:27,675 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:44:27,675 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:44:27,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2018-11-10 04:44:27,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:44:27,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:27,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:44:27,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:44:27,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:44:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:44:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-11-10 04:44:27,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:44:27,918 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 04:44:27,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 69 with the following transitions: [2018-11-10 04:44:27,919 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-10 04:44:27,920 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 04:44:27,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 04:44:27,941 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-10 04:44:27,941 INFO L272 AbstractInterpreter]: Visited 33 different actions 83 times. Never merged. Never widened. Never found a fixpoint. Largest state had 5 variables. [2018-11-10 04:44:27,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:44:27,943 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-10 04:44:27,988 INFO L227 lantSequenceWeakener]: Weakened 52 states. On average, predicates are now at 50.64% of their original sizes. [2018-11-10 04:44:27,989 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-10 04:44:28,461 INFO L415 sIntCurrentIteration]: We unified 67 AI predicates to 67 [2018-11-10 04:44:28,461 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-10 04:44:28,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 04:44:28,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [36] imperfect sequences [17] total 51 [2018-11-10 04:44:28,461 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:44:28,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-10 04:44:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-10 04:44:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1184, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 04:44:28,462 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 36 states. [2018-11-10 04:44:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:44:30,189 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2018-11-10 04:44:30,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 04:44:30,190 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 68 [2018-11-10 04:44:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:44:30,190 INFO L225 Difference]: With dead ends: 92 [2018-11-10 04:44:30,190 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 04:44:30,191 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=3561, Unknown=0, NotChecked=0, Total=3782 [2018-11-10 04:44:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 04:44:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 04:44:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 04:44:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 04:44:30,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2018-11-10 04:44:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:44:30,192 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 04:44:30,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-10 04:44:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 04:44:30,193 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 04:44:30,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 04:44:30,487 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 04:44:30,487 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:44:30,487 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:44:30,487 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 04:44:30,487 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-10 04:44:30,488 INFO L421 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (= main_~x~0 4) [2018-11-10 04:44:30,488 INFO L425 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-10 04:44:30,489 INFO L425 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-10 04:44:30,489 INFO L428 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-10 04:44:30,489 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (* 2 fibo2_~n)) (.cse1 (* 2 |fibo2_#in~n|))) (and (or (<= .cse0 4) (< .cse1 4) (< 4 .cse1)) (not (= |fibo2_#in~n| 1)) (or (< 0 .cse1) (< .cse1 0)) (<= |fibo2_#in~n| fibo2_~n) (or (< .cse1 6) (<= .cse0 6) (< 6 .cse1)))) [2018-11-10 04:44:30,489 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-10 04:44:30,489 INFO L421 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse4 (* 2 |fibo2_#t~ret2|))) (let ((.cse2 (<= .cse4 2)) (.cse1 (* 2 fibo2_~n)) (.cse3 (<= 2 .cse4)) (.cse0 (* 2 |fibo2_#in~n|))) (and (not (= |fibo2_#in~n| 1)) (or (< 0 .cse0) (< .cse0 0)) (<= |fibo2_#in~n| fibo2_~n) (or (and (<= .cse1 4) .cse2 .cse3) (< .cse0 4) (< 4 .cse0)) (or (< .cse0 6) (and .cse2 (<= .cse1 6) .cse3) (< 6 .cse0))))) [2018-11-10 04:44:30,489 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-10 04:44:30,489 INFO L425 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-10 04:44:30,489 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-10 04:44:30,490 INFO L425 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-10 04:44:30,490 INFO L425 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-10 04:44:30,490 INFO L428 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-10 04:44:30,490 INFO L421 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (let ((.cse1 (* 2 |fibo1_#in~n|))) (or (let ((.cse0 (* 2 fibo1_~n))) (and (<= .cse0 4) (<= 4 .cse0))) (< .cse1 4) (< 4 .cse1))) (or (= fibo1_~n 4) (not (= |fibo1_#in~n| 4))) (not (= |fibo1_#in~n| 1)) (not (= |fibo1_#in~n| 0))) [2018-11-10 04:44:30,490 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-10 04:44:30,490 INFO L421 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (* 2 |fibo1_#t~ret0|))) (and (not (= |fibo1_#in~n| 1)) (not (= |fibo1_#in~n| 0)) (or (not (= |fibo1_#in~n| 4)) (and (<= fibo1_~n (+ |fibo1_#t~ret0| 2)) (<= .cse0 4) (= fibo1_~n 4))) (let ((.cse1 (* 2 |fibo1_#in~n|))) (or (< .cse1 4) (let ((.cse2 (* 2 fibo1_~n))) (and (<= 2 .cse0) (<= .cse2 4) (<= .cse0 2) (<= 4 .cse2))) (< 4 .cse1))))) [2018-11-10 04:44:30,490 INFO L425 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-10 04:44:30,490 INFO L425 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-10 04:44:30,491 INFO L425 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-10 04:44:30,491 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-10 04:44:30,491 INFO L425 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-10 04:44:30,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:44:30 BoogieIcfgContainer [2018-11-10 04:44:30,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:44:30,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:44:30,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:44:30,494 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:44:30,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:44:23" (3/4) ... [2018-11-10 04:44:30,496 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 04:44:30,500 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 04:44:30,501 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 04:44:30,501 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-10 04:44:30,501 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-10 04:44:30,511 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 04:44:30,512 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 04:44:30,512 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 04:44:30,542 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8ec3f998-6923-494f-a829-dfc0e0800c07/bin-2019/utaipan/witness.graphml [2018-11-10 04:44:30,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:44:30,543 INFO L168 Benchmark]: Toolchain (without parser) took 7167.93 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 234.4 MB). Free memory was 959.1 MB in the beginning and 1.2 GB in the end (delta: -273.7 MB). Peak memory consumption was 307.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,544 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:30,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.21 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,545 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:44:30,545 INFO L168 Benchmark]: Boogie Preprocessor took 10.55 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,545 INFO L168 Benchmark]: RCFGBuilder took 178.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 945.6 MB in the beginning and 1.2 GB in the end (delta: -215.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,546 INFO L168 Benchmark]: TraceAbstraction took 6772.92 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 61.9 MB). Free memory was 1.2 GB in the beginning and 886.3 MB in the end (delta: 274.5 MB). Peak memory consumption was 336.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,546 INFO L168 Benchmark]: Witness Printer took 49.36 ms. Allocated memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: -524.3 kB). Free memory was 886.3 MB in the beginning and 1.2 GB in the end (delta: -346.5 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2018-11-10 04:44:30,548 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 141.21 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.55 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 945.6 MB in the beginning and 1.2 GB in the end (delta: -215.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6772.92 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 61.9 MB). Free memory was 1.2 GB in the beginning and 886.3 MB in the end (delta: 274.5 MB). Peak memory consumption was 336.3 MB. Max. memory is 11.5 GB. * Witness Printer took 49.36 ms. Allocated memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: -524.3 kB). Free memory was 886.3 MB in the beginning and 1.2 GB in the end (delta: -346.5 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 6.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 3.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 216 SDslu, 1969 SDs, 0 SdLazy, 802 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 364 GetRequests, 209 SyntacticMatches, 8 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 4 AbstIntIterations, 4 AbstIntStrong, 0.914492753623189 AbsIntWeakeningRatio, 0.5652173913043478 AbsIntAvgWeakeningVarsNumRemoved, 5.983695652173913 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 27 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 119 PreInvPairs, 126 NumberOfFragments, 248 HoareAnnotationTreeSize, 119 FomulaSimplifications, 79 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 477 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 362 ConstructedInterpolants, 0 QuantifiedInterpolants, 40212 SizeOfPredicates, 4 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 198/270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...