./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 08:27:26,864 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 08:27:26,864 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 08:27:26,870 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 08:27:26,871 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 08:27:26,871 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 08:27:26,872 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 08:27:26,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 08:27:26,874 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 08:27:26,874 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 08:27:26,874 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 08:27:26,875 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 08:27:26,875 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 08:27:26,875 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 08:27:26,876 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 08:27:26,876 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 08:27:26,877 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 08:27:26,878 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 08:27:26,879 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 08:27:26,880 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 08:27:26,880 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 08:27:26,881 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 08:27:26,882 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 08:27:26,882 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 08:27:26,882 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 08:27:26,882 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 08:27:26,883 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 08:27:26,883 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 08:27:26,884 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 08:27:26,884 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 08:27:26,884 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 08:27:26,885 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 08:27:26,885 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 08:27:26,885 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 08:27:26,886 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 08:27:26,886 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 08:27:26,886 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 08:27:26,893 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 08:27:26,894 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 08:27:26,894 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 08:27:26,894 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 08:27:26,894 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 08:27:26,895 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 08:27:26,895 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 08:27:26,896 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 08:27:26,896 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 08:27:26,896 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 08:27:26,897 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 08:27:26,897 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 08:27:26,897 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 08:27:26,897 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer 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 -> Automizer 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 -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-12-08 08:27:26,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 08:27:26,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 08:27:26,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 08:27:26,925 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 08:27:26,925 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 08:27:26,925 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:27:26,963 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/data/0ff293e2c/60aa959066ea4af887860b39935bc69e/FLAGf7a13ce0a [2018-12-08 08:27:27,389 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 08:27:27,389 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:27:27,393 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/data/0ff293e2c/60aa959066ea4af887860b39935bc69e/FLAGf7a13ce0a [2018-12-08 08:27:27,401 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/data/0ff293e2c/60aa959066ea4af887860b39935bc69e [2018-12-08 08:27:27,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 08:27:27,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 08:27:27,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 08:27:27,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 08:27:27,406 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 08:27:27,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdfc843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27, skipping insertion in model container [2018-12-08 08:27:27,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 08:27:27,420 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 08:27:27,501 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:27:27,503 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 08:27:27,512 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 08:27:27,519 INFO L195 MainTranslator]: Completed translation [2018-12-08 08:27:27,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27 WrapperNode [2018-12-08 08:27:27,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 08:27:27,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 08:27:27,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 08:27:27,520 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 08:27:27,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 08:27:27,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 08:27:27,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 08:27:27,532 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 08:27:27,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... [2018-12-08 08:27:27,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 08:27:27,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 08:27:27,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 08:27:27,542 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 08:27:27,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-08 08:27:27,603 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-08 08:27:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 08:27:27,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 08:27:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 08:27:27,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 08:27:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 08:27:27,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 08:27:27,684 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 08:27:27,685 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 08:27:27,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:27:27 BoogieIcfgContainer [2018-12-08 08:27:27,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 08:27:27,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 08:27:27,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 08:27:27,688 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 08:27:27,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:27:27" (1/3) ... [2018-12-08 08:27:27,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295075b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:27:27, skipping insertion in model container [2018-12-08 08:27:27,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:27:27" (2/3) ... [2018-12-08 08:27:27,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295075b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:27:27, skipping insertion in model container [2018-12-08 08:27:27,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:27:27" (3/3) ... [2018-12-08 08:27:27,690 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 08:27:27,696 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 08:27:27,700 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 08:27:27,710 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 08:27:27,728 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 08:27:27,728 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 08:27:27,728 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 08:27:27,728 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 08:27:27,728 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 08:27:27,728 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 08:27:27,729 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 08:27:27,729 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 08:27:27,729 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 08:27:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-08 08:27:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 08:27:27,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:27,743 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:27,744 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:27,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:27,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-12-08 08:27:27,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:27,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:27,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:27,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:27,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:27,847 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 08:27:27,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:27:27,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 08:27:27,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 08:27:27,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 08:27:27,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 08:27:27,860 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-08 08:27:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:27,934 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-08 08:27:27,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 08:27:27,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 08:27:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:27,942 INFO L225 Difference]: With dead ends: 36 [2018-12-08 08:27:27,942 INFO L226 Difference]: Without dead ends: 22 [2018-12-08 08:27:27,944 INFO L631 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 [2018-12-08 08:27:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-08 08:27:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-08 08:27:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 08:27:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-08 08:27:27,968 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-12-08 08:27:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:27,968 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-08 08:27:27,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 08:27:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-08 08:27:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-08 08:27:27,969 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:27,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:27,969 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:27,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-12-08 08:27:27,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:27,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:27,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:27,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 08:27:27,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 08:27:27,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 08:27:28,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 08:27:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 08:27:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 08:27:28,001 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-12-08 08:27:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:28,042 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-12-08 08:27:28,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 08:27:28,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-08 08:27:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:28,043 INFO L225 Difference]: With dead ends: 28 [2018-12-08 08:27:28,043 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 08:27:28,044 INFO L631 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 [2018-12-08 08:27:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 08:27:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-12-08 08:27:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-08 08:27:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-08 08:27:28,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-12-08 08:27:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:28,047 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-08 08:27:28,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 08:27:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-08 08:27:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 08:27:28,048 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:28,048 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:28,048 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:28,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-12-08 08:27:28,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:28,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:28,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:28,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 08:27:28,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:28,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:28,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 08:27:28,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:28,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-08 08:27:28,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 08:27:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 08:27:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-08 08:27:28,166 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-12-08 08:27:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:28,223 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-12-08 08:27:28,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 08:27:28,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-08 08:27:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:28,224 INFO L225 Difference]: With dead ends: 39 [2018-12-08 08:27:28,224 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 08:27:28,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:27:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 08:27:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 08:27:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 08:27:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-08 08:27:28,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-12-08 08:27:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:28,228 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-08 08:27:28,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 08:27:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-08 08:27:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-08 08:27:28,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:28,228 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:28,229 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:28,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:28,229 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-12-08 08:27:28,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:28,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:28,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:28,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 08:27:28,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:28,264 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:28,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 08:27:28,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:28,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 08:27:28,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 08:27:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 08:27:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 08:27:28,298 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-12-08 08:27:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:28,351 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-12-08 08:27:28,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 08:27:28,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-12-08 08:27:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:28,352 INFO L225 Difference]: With dead ends: 33 [2018-12-08 08:27:28,352 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 08:27:28,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 08:27:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 08:27:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-08 08:27:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-08 08:27:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-12-08 08:27:28,357 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-12-08 08:27:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:28,357 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-12-08 08:27:28,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 08:27:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-12-08 08:27:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 08:27:28,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:28,358 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:28,358 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:28,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-12-08 08:27:28,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:28,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:28,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:28,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-08 08:27:28,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:28,387 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:28,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:27:28,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:27:28,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:28,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-08 08:27:28,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:28,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-08 08:27:28,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 08:27:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 08:27:28,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-08 08:27:28,442 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 9 states. [2018-12-08 08:27:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:28,511 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2018-12-08 08:27:28,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 08:27:28,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-12-08 08:27:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:28,512 INFO L225 Difference]: With dead ends: 43 [2018-12-08 08:27:28,513 INFO L226 Difference]: Without dead ends: 37 [2018-12-08 08:27:28,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-12-08 08:27:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-08 08:27:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-12-08 08:27:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 08:27:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-12-08 08:27:28,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 41 [2018-12-08 08:27:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:28,521 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-12-08 08:27:28,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 08:27:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-12-08 08:27:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-08 08:27:28,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:28,524 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:28,524 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:28,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2018-12-08 08:27:28,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:28,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:28,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:28,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-08 08:27:28,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:28,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:28,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 08:27:28,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-08 08:27:28,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:28,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-08 08:27:28,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:28,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-12-08 08:27:28,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 08:27:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 08:27:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-08 08:27:28,703 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 12 states. [2018-12-08 08:27:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:28,873 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2018-12-08 08:27:28,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 08:27:28,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-12-08 08:27:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:28,874 INFO L225 Difference]: With dead ends: 77 [2018-12-08 08:27:28,874 INFO L226 Difference]: Without dead ends: 50 [2018-12-08 08:27:28,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-12-08 08:27:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-08 08:27:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-12-08 08:27:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-08 08:27:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 64 transitions. [2018-12-08 08:27:28,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 64 transitions. Word has length 97 [2018-12-08 08:27:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:28,881 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 64 transitions. [2018-12-08 08:27:28,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 08:27:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 64 transitions. [2018-12-08 08:27:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-08 08:27:28,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:28,882 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:28,882 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:28,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 587556238, now seen corresponding path program 4 times [2018-12-08 08:27:28,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:28,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:28,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:28,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 113 proven. 82 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-08 08:27:28,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:28,932 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/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 08:27:28,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 08:27:28,951 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 08:27:28,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:28,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 84 proven. 176 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-12-08 08:27:29,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:29,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2018-12-08 08:27:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 08:27:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 08:27:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-12-08 08:27:29,027 INFO L87 Difference]: Start difference. First operand 44 states and 64 transitions. Second operand 14 states. [2018-12-08 08:27:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:29,347 INFO L93 Difference]: Finished difference Result 108 states and 183 transitions. [2018-12-08 08:27:29,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-08 08:27:29,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2018-12-08 08:27:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:29,349 INFO L225 Difference]: With dead ends: 108 [2018-12-08 08:27:29,349 INFO L226 Difference]: Without dead ends: 69 [2018-12-08 08:27:29,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2018-12-08 08:27:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-08 08:27:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-08 08:27:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-08 08:27:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-12-08 08:27:29,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 98 [2018-12-08 08:27:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:29,356 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2018-12-08 08:27:29,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 08:27:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2018-12-08 08:27:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-12-08 08:27:29,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:29,358 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:29,358 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:29,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 5 times [2018-12-08 08:27:29,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:29,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:29,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:29,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:29,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-12-08 08:27:29,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:29,474 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:27:29,480 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 08:27:29,521 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-12-08 08:27:29,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:29,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 586 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2018-12-08 08:27:29,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:29,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 17 [2018-12-08 08:27:29,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 08:27:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 08:27:29,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-12-08 08:27:29,619 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 17 states. [2018-12-08 08:27:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:30,014 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2018-12-08 08:27:30,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-08 08:27:30,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2018-12-08 08:27:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:30,016 INFO L225 Difference]: With dead ends: 153 [2018-12-08 08:27:30,016 INFO L226 Difference]: Without dead ends: 93 [2018-12-08 08:27:30,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=321, Invalid=1085, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 08:27:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-08 08:27:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2018-12-08 08:27:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-08 08:27:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2018-12-08 08:27:30,024 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2018-12-08 08:27:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:30,024 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2018-12-08 08:27:30,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 08:27:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2018-12-08 08:27:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-12-08 08:27:30,027 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:30,027 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:30,028 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:30,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:30,028 INFO L82 PathProgramCache]: Analyzing trace with hash 39069676, now seen corresponding path program 6 times [2018-12-08 08:27:30,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:30,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:30,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:30,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:30,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-12-08 08:27:30,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:30,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:27:30,152 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 08:27:30,183 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-08 08:27:30,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:30,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 331 proven. 821 refuted. 0 times theorem prover too weak. 3416 trivial. 0 not checked. [2018-12-08 08:27:30,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:30,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2018-12-08 08:27:30,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 08:27:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 08:27:30,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-08 08:27:30,251 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 11 states. [2018-12-08 08:27:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:30,347 INFO L93 Difference]: Finished difference Result 91 states and 125 transitions. [2018-12-08 08:27:30,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 08:27:30,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 287 [2018-12-08 08:27:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:30,348 INFO L225 Difference]: With dead ends: 91 [2018-12-08 08:27:30,348 INFO L226 Difference]: Without dead ends: 87 [2018-12-08 08:27:30,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-08 08:27:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-08 08:27:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-12-08 08:27:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-08 08:27:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2018-12-08 08:27:30,355 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 287 [2018-12-08 08:27:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:30,355 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2018-12-08 08:27:30,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 08:27:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2018-12-08 08:27:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-12-08 08:27:30,362 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:30,362 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 69, 42, 42, 42, 42, 42, 42, 42, 27, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:30,362 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:30,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash -75689396, now seen corresponding path program 7 times [2018-12-08 08:27:30,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:30,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:30,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:30,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:30,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 1960 proven. 2026 refuted. 0 times theorem prover too weak. 16084 trivial. 0 not checked. [2018-12-08 08:27:30,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:30,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:27:30,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:30,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 448 proven. 2987 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2018-12-08 08:27:30,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:30,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2018-12-08 08:27:30,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 08:27:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 08:27:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-12-08 08:27:30,894 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand 21 states. [2018-12-08 08:27:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:31,462 INFO L93 Difference]: Finished difference Result 210 states and 375 transitions. [2018-12-08 08:27:31,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-08 08:27:31,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 587 [2018-12-08 08:27:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:31,464 INFO L225 Difference]: With dead ends: 210 [2018-12-08 08:27:31,464 INFO L226 Difference]: Without dead ends: 130 [2018-12-08 08:27:31,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=2331, Unknown=0, NotChecked=0, Total=2970 [2018-12-08 08:27:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-08 08:27:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-12-08 08:27:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-08 08:27:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2018-12-08 08:27:31,473 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 587 [2018-12-08 08:27:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:31,473 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2018-12-08 08:27:31,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 08:27:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2018-12-08 08:27:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2018-12-08 08:27:31,477 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:31,477 INFO L402 BasicCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:31,477 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:31,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1739658035, now seen corresponding path program 8 times [2018-12-08 08:27:31,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:31,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:31,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:31,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 08:27:31,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 4524 proven. 1468 refuted. 0 times theorem prover too weak. 33496 trivial. 0 not checked. [2018-12-08 08:27:31,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:31,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:27:31,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 08:27:31,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 08:27:31,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:31,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 3465 proven. 5944 refuted. 0 times theorem prover too weak. 30079 trivial. 0 not checked. [2018-12-08 08:27:32,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:32,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2018-12-08 08:27:32,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-08 08:27:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 08:27:32,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2018-12-08 08:27:32,286 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand 25 states. [2018-12-08 08:27:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:32,926 INFO L93 Difference]: Finished difference Result 269 states and 488 transitions. [2018-12-08 08:27:32,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-08 08:27:32,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 818 [2018-12-08 08:27:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:32,928 INFO L225 Difference]: With dead ends: 269 [2018-12-08 08:27:32,929 INFO L226 Difference]: Without dead ends: 159 [2018-12-08 08:27:32,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2826, Unknown=0, NotChecked=0, Total=3540 [2018-12-08 08:27:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-12-08 08:27:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2018-12-08 08:27:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-12-08 08:27:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 187 transitions. [2018-12-08 08:27:32,941 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 187 transitions. Word has length 818 [2018-12-08 08:27:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:32,942 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 187 transitions. [2018-12-08 08:27:32,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-08 08:27:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 187 transitions. [2018-12-08 08:27:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-12-08 08:27:32,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 08:27:32,946 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 08:27:32,947 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 08:27:32,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 08:27:32,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 9 times [2018-12-08 08:27:32,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 08:27:32,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 08:27:32,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:32,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 08:27:32,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 08:27:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 08:27:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-08 08:27:33,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 08:27:33,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 08:27:33,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 08:27:33,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-08 08:27:33,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 08:27:33,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 08:27:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-08 08:27:34,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 08:27:34,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-12-08 08:27:34,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-08 08:27:34,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-08 08:27:34,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 08:27:34,169 INFO L87 Difference]: Start difference. First operand 130 states and 187 transitions. Second operand 36 states. [2018-12-08 08:27:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 08:27:34,291 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2018-12-08 08:27:34,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 08:27:34,291 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-12-08 08:27:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 08:27:34,292 INFO L225 Difference]: With dead ends: 131 [2018-12-08 08:27:34,292 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 08:27:34,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2018-12-08 08:27:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 08:27:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 08:27:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 08:27:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 08:27:34,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-12-08 08:27:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 08:27:34,293 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 08:27:34,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-08 08:27:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 08:27:34,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 08:27:34,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 08:27:34,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,311 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 08:27:34,676 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2018-12-08 08:27:34,677 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-08 08:27:34,677 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-08 08:27:34,677 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (< 1 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-12-08 08:27:34,677 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-08 08:27:34,677 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and (<= 21 |fibonacci_#t~ret0|) .cse0) (and (<= |fibonacci_#in~n| 3) .cse0) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) (<= 7 fibonacci_~n)) (and .cse0 (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5)) (and (<= 13 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 8)) (and .cse0 (<= fibonacci_~n 4) (<= 2 |fibonacci_#t~ret0|)) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= 6 fibonacci_~n)))) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 08:27:34,678 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-12-08 08:27:34,678 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-12-08 08:27:34,678 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-08 08:27:34,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:27:34 BoogieIcfgContainer [2018-12-08 08:27:34,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 08:27:34,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 08:27:34,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 08:27:34,680 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 08:27:34,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:27:27" (3/4) ... [2018-12-08 08:27:34,683 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 08:27:34,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-08 08:27:34,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 08:27:34,687 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 08:27:34,690 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 08:27:34,690 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 08:27:34,690 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 08:27:34,717 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_50ce2bd3-5e5c-4eff-87b3-976a42a6fb74/bin-2019/uautomizer/witness.graphml [2018-12-08 08:27:34,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 08:27:34,717 INFO L168 Benchmark]: Toolchain (without parser) took 7314.36 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 723.5 MB). Free memory was 960.3 MB in the beginning and 1.0 GB in the end (delta: -62.3 MB). Peak memory consumption was 661.2 MB. Max. memory is 11.5 GB. [2018-12-08 08:27:34,718 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:27:34,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 115.70 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 08:27:34,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.46 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:27:34,718 INFO L168 Benchmark]: Boogie Preprocessor took 10.17 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:27:34,718 INFO L168 Benchmark]: RCFGBuilder took 143.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -180.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-08 08:27:34,719 INFO L168 Benchmark]: TraceAbstraction took 6994.45 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 574.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.9 MB). Peak memory consumption was 681.6 MB. Max. memory is 11.5 GB. [2018-12-08 08:27:34,719 INFO L168 Benchmark]: Witness Printer took 36.56 ms. Allocated memory is still 1.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 08:27:34,720 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 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 115.70 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.46 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.17 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -180.0 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6994.45 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 574.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.9 MB). Peak memory consumption was 681.6 MB. Max. memory is 11.5 GB. * Witness Printer took 36.56 ms. Allocated memory is still 1.8 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 4 procedures, 24 locations, 1 error locations. SAFE Result, 6.9s OverallTime, 12 OverallIterations, 119 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 318 SDtfs, 861 SDslu, 1412 SDs, 0 SdLazy, 2285 SolverSat, 1062 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3421 GetRequests, 3139 SyntacticMatches, 2 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 62 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 239 PreInvPairs, 330 NumberOfFragments, 93 HoareAnnotationTreeSize, 239 FomulaSimplifications, 1380 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3241 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 5933 NumberOfCodeBlocks, 5698 NumberOfCodeBlocksAsserted, 164 NumberOfCheckSat, 5911 ConstructedInterpolants, 0 QuantifiedInterpolants, 5422699 SizeOfPredicates, 62 NumberOfNonLiveVariables, 6048 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 176572/201478 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...